QueryableExtensions.AverageAsync Method (System.Data.Entity)

Asynchronously computes the average of a sequence of Decimal values.

Namespace: System.Data.Entity
Assembly: EntityFramework (in EntityFramework.dll)

Overload List

	Name	Description
	AverageAsync(IQueryable<Decimal>^)	Asynchronously computes the average of a sequence of Decimal values.
	AverageAsync(IQueryable<Decimal>^, CancellationToken)	Asynchronously computes the average of a sequence of Decimal values.
	AverageAsync(IQueryable<Double>^)	Asynchronously computes the average of a sequence of Double values.
	AverageAsync(IQueryable<Double>^, CancellationToken)	Asynchronously computes the average of a sequence of Double values.
	AverageAsync(IQueryable<Int32>^)	Asynchronously computes the average of a sequence of Int32 values.
	AverageAsync(IQueryable<Int32>^, CancellationToken)	Asynchronously computes the average of a sequence of Int32 values.
	AverageAsync(IQueryable<Int64>^)	Asynchronously computes the average of a sequence of Int64 values.
	AverageAsync(IQueryable<Int64>^, CancellationToken)	Asynchronously computes the average of a sequence of Int64 values.
	AverageAsync(IQueryable<Nullable<Decimal>>^)	Asynchronously computes the average of a sequence of nullable Decimal values.
	AverageAsync(IQueryable<Nullable<Decimal>>^, CancellationToken)	Asynchronously computes the average of a sequence of nullable Decimal values.
	AverageAsync(IQueryable<Nullable<Double>>^)	Asynchronously computes the average of a sequence of nullable Double values.
	AverageAsync(IQueryable<Nullable<Double>>^, CancellationToken)	Asynchronously computes the average of a sequence of nullable Double values.
	AverageAsync(IQueryable<Nullable<Int32>>^)	Asynchronously computes the average of a sequence of nullable Int32 values.
	AverageAsync(IQueryable<Nullable<Int32>>^, CancellationToken)	Asynchronously computes the average of a sequence of nullable Int32 values.
	AverageAsync(IQueryable<Nullable<Int64>>^)	Asynchronously computes the average of a sequence of nullable Int64 values.
	AverageAsync(IQueryable<Nullable<Int64>>^, CancellationToken)	Asynchronously computes the average of a sequence of nullable Int64 values.
	AverageAsync(IQueryable<Nullable<Single>>^)	Asynchronously computes the average of a sequence of nullable Single values.
	AverageAsync(IQueryable<Nullable<Single>>^, CancellationToken)	Asynchronously computes the average of a sequence of nullable Single values.
	AverageAsync(IQueryable<Single>^)	Asynchronously computes the average of a sequence of Single values.
	AverageAsync(IQueryable<Single>^, CancellationToken)	Asynchronously computes the average of a sequence of Single values.
	AverageAsync<TSource>(IQueryable<TSource>^, Expression<Func<TSource, Decimal>^>^)	Asynchronously computes the average of a sequence of Decimal values that is obtained by invoking a projection function on each element of the input sequence.
	AverageAsync<TSource>(IQueryable<TSource>^, Expression<Func<TSource, Decimal>^>^, CancellationToken)	Asynchronously computes the average of a sequence of Decimal values that is obtained by invoking a projection function on each element of the input sequence.
	AverageAsync<TSource>(IQueryable<TSource>^, Expression<Func<TSource, Double>^>^)	Asynchronously computes the average of a sequence of Double values that is obtained by invoking a projection function on each element of the input sequence.
	AverageAsync<TSource>(IQueryable<TSource>^, Expression<Func<TSource, Double>^>^, CancellationToken)	Asynchronously computes the average of a sequence of Double values that is obtained by invoking a projection function on each element of the input sequence.
	AverageAsync<TSource>(IQueryable<TSource>^, Expression<Func<TSource, Int32>^>^)	Asynchronously computes the average of a sequence of Int32 values that is obtained by invoking a projection function on each element of the input sequence.
	AverageAsync<TSource>(IQueryable<TSource>^, Expression<Func<TSource, Int32>^>^, CancellationToken)	Asynchronously computes the average of a sequence of Int32 values that is obtained by invoking a projection function on each element of the input sequence.
	AverageAsync<TSource>(IQueryable<TSource>^, Expression<Func<TSource, Int64>^>^)	Asynchronously computes the average of a sequence of Int64 values that is obtained by invoking a projection function on each element of the input sequence.
	AverageAsync<TSource>(IQueryable<TSource>^, Expression<Func<TSource, Int64>^>^, CancellationToken)	Asynchronously computes the average of a sequence of Int64 values that is obtained by invoking a projection function on each element of the input sequence.
	AverageAsync<TSource>(IQueryable<TSource>^, Expression<Func<TSource, Nullable<Decimal>>^>^)	Asynchronously computes the average of a sequence of nullable Decimal values that is obtained by invoking a projection function on each element of the input sequence.
	AverageAsync<TSource>(IQueryable<TSource>^, Expression<Func<TSource, Nullable<Decimal>>^>^, CancellationToken)	Asynchronously computes the average of a sequence of nullable Decimal values that is obtained by invoking a projection function on each element of the input sequence.
	AverageAsync<TSource>(IQueryable<TSource>^, Expression<Func<TSource, Nullable<Double>>^>^)	Asynchronously computes the average of a sequence of nullable Double values that is obtained by invoking a projection function on each element of the input sequence.
	AverageAsync<TSource>(IQueryable<TSource>^, Expression<Func<TSource, Nullable<Double>>^>^, CancellationToken)	Asynchronously computes the average of a sequence of nullable Double values that is obtained by invoking a projection function on each element of the input sequence.
	AverageAsync<TSource>(IQueryable<TSource>^, Expression<Func<TSource, Nullable<Int32>>^>^)	Asynchronously computes the average of a sequence of nullable Int32 values that is obtained by invoking a projection function on each element of the input sequence.
	AverageAsync<TSource>(IQueryable<TSource>^, Expression<Func<TSource, Nullable<Int32>>^>^, CancellationToken)	Asynchronously computes the average of a sequence of nullable Int32 values that is obtained by invoking a projection function on each element of the input sequence.
	AverageAsync<TSource>(IQueryable<TSource>^, Expression<Func<TSource, Nullable<Int64>>^>^)	Asynchronously computes the average of a sequence of nullable Int64 values that is obtained by invoking a projection function on each element of the input sequence.
	AverageAsync<TSource>(IQueryable<TSource>^, Expression<Func<TSource, Nullable<Int64>>^>^, CancellationToken)	Asynchronously computes the average of a sequence of nullable Int64 values that is obtained by invoking a projection function on each element of the input sequence.
	AverageAsync<TSource>(IQueryable<TSource>^, Expression<Func<TSource, Nullable<Single>>^>^)	Asynchronously computes the average of a sequence of nullable Single values that is obtained by invoking a projection function on each element of the input sequence.
	AverageAsync<TSource>(IQueryable<TSource>^, Expression<Func<TSource, Nullable<Single>>^>^, CancellationToken)	Asynchronously computes the average of a sequence of nullable Single values that is obtained by invoking a projection function on each element of the input sequence.
	AverageAsync<TSource>(IQueryable<TSource>^, Expression<Func<TSource, Single>^>^)	Asynchronously computes the average of a sequence of Single values that is obtained by invoking a projection function on each element of the input sequence.
	AverageAsync<TSource>(IQueryable<TSource>^, Expression<Func<TSource, Single>^>^, CancellationToken)	Asynchronously computes the average of a sequence of Single values that is obtained by invoking a projection function on each element of the input sequence.

QueryableExtensions::AverageAsync Method (IQueryable<Decimal>^)

Asynchronously computes the average of a sequence of Decimal values.

Syntax

public:
[ExtensionAttribute]
static Task<Decimal>^ AverageAsync(
	IQueryable<Decimal>^ source
)

Parameters

source: Type: System.Linq::IQueryable<Decimal>^
A sequence of Decimal values to calculate the average of.

Return Value

Type: System.Threading.Tasks::Task<Decimal>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Exceptions

Exception	Condition
ArgumentNullException	source is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .
InvalidOperationException	source contains no elements.

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

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QueryableExtensions::AverageAsync Method (IQueryable<Decimal>^, CancellationToken)

Asynchronously computes the average of a sequence of Decimal values.

Syntax

public:
[ExtensionAttribute]
static Task<Decimal>^ AverageAsync(
	IQueryable<Decimal>^ source,
	CancellationToken cancellationToken
)

Parameters

source: Type: System.Linq::IQueryable<Decimal>^
A sequence of Decimal values to calculate the average of.

cancellationToken: Type: System.Threading::CancellationToken
A CancellationToken to observe while waiting for the task to complete.

Return Value

Type: System.Threading.Tasks::Task<Decimal>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Exceptions

Exception	Condition
ArgumentNullException	source is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .
InvalidOperationException	source contains no elements.

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

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QueryableExtensions::AverageAsync Method (IQueryable<Double>^)

Asynchronously computes the average of a sequence of Double values.

Syntax

public:
[ExtensionAttribute]
static Task<double>^ AverageAsync(
	IQueryable<double>^ source
)

Parameters

source: Type: System.Linq::IQueryable<Double>^
A sequence of Double values to calculate the average of.

Return Value

Type: System.Threading.Tasks::Task<Double>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Exceptions

Exception	Condition
ArgumentNullException	source is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .
InvalidOperationException	source contains no elements.

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

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QueryableExtensions::AverageAsync Method (IQueryable<Double>^, CancellationToken)

Asynchronously computes the average of a sequence of Double values.

Syntax

public:
[ExtensionAttribute]
static Task<double>^ AverageAsync(
	IQueryable<double>^ source,
	CancellationToken cancellationToken
)

Parameters

source: Type: System.Linq::IQueryable<Double>^
A sequence of Double values to calculate the average of.

cancellationToken: Type: System.Threading::CancellationToken
A CancellationToken to observe while waiting for the task to complete.

Return Value

Type: System.Threading.Tasks::Task<Double>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Exceptions

Exception	Condition
ArgumentNullException	source is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .
InvalidOperationException	source contains no elements.

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

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QueryableExtensions::AverageAsync Method (IQueryable<Int32>^)

Asynchronously computes the average of a sequence of Int32 values.

Syntax

public:
[ExtensionAttribute]
static Task<double>^ AverageAsync(
	IQueryable<int>^ source
)

Parameters

source: Type: System.Linq::IQueryable<Int32>^
A sequence of Int32 values to calculate the average of.

Return Value

Type: System.Threading.Tasks::Task<Double>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Exceptions

Exception	Condition
ArgumentNullException	source is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .
InvalidOperationException	source contains no elements.

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

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QueryableExtensions::AverageAsync Method (IQueryable<Int32>^, CancellationToken)

Asynchronously computes the average of a sequence of Int32 values.

Syntax

public:
[ExtensionAttribute]
static Task<double>^ AverageAsync(
	IQueryable<int>^ source,
	CancellationToken cancellationToken
)

Parameters

source: Type: System.Linq::IQueryable<Int32>^
A sequence of Int32 values to calculate the average of.

cancellationToken: Type: System.Threading::CancellationToken
A CancellationToken to observe while waiting for the task to complete.

Return Value

Type: System.Threading.Tasks::Task<Double>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Exceptions

Exception	Condition
ArgumentNullException	source is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .
InvalidOperationException	source contains no elements.

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

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QueryableExtensions::AverageAsync Method (IQueryable<Int64>^)

Asynchronously computes the average of a sequence of Int64 values.

Syntax

public:
[ExtensionAttribute]
static Task<double>^ AverageAsync(
	IQueryable<long long>^ source
)

Parameters

source: Type: System.Linq::IQueryable<Int64>^
A sequence of Int64 values to calculate the average of.

Return Value

Type: System.Threading.Tasks::Task<Double>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Exceptions

Exception	Condition
ArgumentNullException	source is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .
InvalidOperationException	source contains no elements.

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

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QueryableExtensions::AverageAsync Method (IQueryable<Int64>^, CancellationToken)

Asynchronously computes the average of a sequence of Int64 values.

Syntax

public:
[ExtensionAttribute]
static Task<double>^ AverageAsync(
	IQueryable<long long>^ source,
	CancellationToken cancellationToken
)

Parameters

source: Type: System.Linq::IQueryable<Int64>^
A sequence of Int64 values to calculate the average of.

cancellationToken: Type: System.Threading::CancellationToken
A CancellationToken to observe while waiting for the task to complete.

Return Value

Type: System.Threading.Tasks::Task<Double>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Exceptions

Exception	Condition
ArgumentNullException	source is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .
InvalidOperationException	source contains no elements.

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

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QueryableExtensions::AverageAsync Method (IQueryable<Nullable<Decimal>>^)

Asynchronously computes the average of a sequence of nullable Decimal values.

Syntax

public:
[ExtensionAttribute]
[SuppressMessageAttribute("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures")]
static Task<Nullable<Decimal>>^ AverageAsync(
	IQueryable<Nullable<Decimal>>^ source
)

Parameters

source: Type: System.Linq::IQueryable<Nullable<Decimal>>^
A sequence of nullable Decimal values to calculate the average of.

Return Value

Type: System.Threading.Tasks::Task<Nullable<Decimal>>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Exceptions

Exception	Condition
ArgumentNullException	source is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

Return to top

QueryableExtensions::AverageAsync Method (IQueryable<Nullable<Decimal>>^, CancellationToken)

Asynchronously computes the average of a sequence of nullable Decimal values.

Syntax

public:
[ExtensionAttribute]
[SuppressMessageAttribute("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures")]
static Task<Nullable<Decimal>>^ AverageAsync(
	IQueryable<Nullable<Decimal>>^ source,
	CancellationToken cancellationToken
)

Parameters

source: Type: System.Linq::IQueryable<Nullable<Decimal>>^
A sequence of nullable Decimal values to calculate the average of.

cancellationToken: Type: System.Threading::CancellationToken
A CancellationToken to observe while waiting for the task to complete.

Return Value

Type: System.Threading.Tasks::Task<Nullable<Decimal>>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Exceptions

Exception	Condition
ArgumentNullException	source is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

Return to top

QueryableExtensions::AverageAsync Method (IQueryable<Nullable<Double>>^)

Asynchronously computes the average of a sequence of nullable Double values.

Syntax

public:
[ExtensionAttribute]
[SuppressMessageAttribute("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures")]
static Task<Nullable<double>>^ AverageAsync(
	IQueryable<Nullable<double>>^ source
)

Parameters

source: Type: System.Linq::IQueryable<Nullable<Double>>^
A sequence of nullable Double values to calculate the average of.

Return Value

Type: System.Threading.Tasks::Task<Nullable<Double>>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Exceptions

Exception	Condition
ArgumentNullException	source is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

Return to top

QueryableExtensions::AverageAsync Method (IQueryable<Nullable<Double>>^, CancellationToken)

Asynchronously computes the average of a sequence of nullable Double values.

Syntax

public:
[ExtensionAttribute]
[SuppressMessageAttribute("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures")]
static Task<Nullable<double>>^ AverageAsync(
	IQueryable<Nullable<double>>^ source,
	CancellationToken cancellationToken
)

Parameters

source: Type: System.Linq::IQueryable<Nullable<Double>>^
A sequence of nullable Double values to calculate the average of.

cancellationToken: Type: System.Threading::CancellationToken
A CancellationToken to observe while waiting for the task to complete.

Return Value

Type: System.Threading.Tasks::Task<Nullable<Double>>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Exceptions

Exception	Condition
ArgumentNullException	source is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

Return to top

QueryableExtensions::AverageAsync Method (IQueryable<Nullable<Int32>>^)

Asynchronously computes the average of a sequence of nullable Int32 values.

Syntax

public:
[ExtensionAttribute]
[SuppressMessageAttribute("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures")]
static Task<Nullable<double>>^ AverageAsync(
	IQueryable<Nullable<int>>^ source
)

Parameters

source: Type: System.Linq::IQueryable<Nullable<Int32>>^
A sequence of nullable Int32 values to calculate the average of.

Return Value

Type: System.Threading.Tasks::Task<Nullable<Double>>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Exceptions

Exception	Condition
ArgumentNullException	source is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

Return to top

QueryableExtensions::AverageAsync Method (IQueryable<Nullable<Int32>>^, CancellationToken)

Asynchronously computes the average of a sequence of nullable Int32 values.

Syntax

public:
[SuppressMessageAttribute("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures")]
[ExtensionAttribute]
static Task<Nullable<double>>^ AverageAsync(
	IQueryable<Nullable<int>>^ source,
	CancellationToken cancellationToken
)

Parameters

source: Type: System.Linq::IQueryable<Nullable<Int32>>^
A sequence of nullable Int32 values to calculate the average of.

cancellationToken: Type: System.Threading::CancellationToken
A CancellationToken to observe while waiting for the task to complete.

Return Value

Type: System.Threading.Tasks::Task<Nullable<Double>>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Exceptions

Exception	Condition
ArgumentNullException	source is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

Return to top

QueryableExtensions::AverageAsync Method (IQueryable<Nullable<Int64>>^)

Asynchronously computes the average of a sequence of nullable Int64 values.

Syntax

public:
[ExtensionAttribute]
[SuppressMessageAttribute("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures")]
static Task<Nullable<double>>^ AverageAsync(
	IQueryable<Nullable<long long>>^ source
)

Parameters

source: Type: System.Linq::IQueryable<Nullable<Int64>>^
A sequence of nullable Int64 values to calculate the average of.

Return Value

Type: System.Threading.Tasks::Task<Nullable<Double>>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Exceptions

Exception	Condition
ArgumentNullException	source is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

Return to top

QueryableExtensions::AverageAsync Method (IQueryable<Nullable<Int64>>^, CancellationToken)

Asynchronously computes the average of a sequence of nullable Int64 values.

Syntax

public:
[ExtensionAttribute]
[SuppressMessageAttribute("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures")]
static Task<Nullable<double>>^ AverageAsync(
	IQueryable<Nullable<long long>>^ source,
	CancellationToken cancellationToken
)

Parameters

source: Type: System.Linq::IQueryable<Nullable<Int64>>^
A sequence of nullable Int64 values to calculate the average of.

cancellationToken: Type: System.Threading::CancellationToken
A CancellationToken to observe while waiting for the task to complete.

Return Value

Type: System.Threading.Tasks::Task<Nullable<Double>>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Exceptions

Exception	Condition
ArgumentNullException	source is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

Return to top

QueryableExtensions::AverageAsync Method (IQueryable<Nullable<Single>>^)

Asynchronously computes the average of a sequence of nullable Single values.

Syntax

public:
[SuppressMessageAttribute("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures")]
[ExtensionAttribute]
static Task<Nullable<float>>^ AverageAsync(
	IQueryable<Nullable<float>>^ source
)

Parameters

source: Type: System.Linq::IQueryable<Nullable<Single>>^
A sequence of nullable Single values to calculate the average of.

Return Value

Type: System.Threading.Tasks::Task<Nullable<Single>>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Exceptions

Exception	Condition
ArgumentNullException	source is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

Return to top

QueryableExtensions::AverageAsync Method (IQueryable<Nullable<Single>>^, CancellationToken)

Asynchronously computes the average of a sequence of nullable Single values.

Syntax

public:
[ExtensionAttribute]
[SuppressMessageAttribute("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures")]
static Task<Nullable<float>>^ AverageAsync(
	IQueryable<Nullable<float>>^ source,
	CancellationToken cancellationToken
)

Parameters

source: Type: System.Linq::IQueryable<Nullable<Single>>^
A sequence of nullable Single values to calculate the average of.

cancellationToken: Type: System.Threading::CancellationToken
A CancellationToken to observe while waiting for the task to complete.

Return Value

Type: System.Threading.Tasks::Task<Nullable<Single>>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Exceptions

Exception	Condition
ArgumentNullException	source is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

Return to top

QueryableExtensions::AverageAsync Method (IQueryable<Single>^)

Asynchronously computes the average of a sequence of Single values.

Syntax

public:
[ExtensionAttribute]
static Task<float>^ AverageAsync(
	IQueryable<float>^ source
)

Parameters

source: Type: System.Linq::IQueryable<Single>^
A sequence of Single values to calculate the average of.

Return Value

Type: System.Threading.Tasks::Task<Single>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Exceptions

Exception	Condition
ArgumentNullException	source is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .
InvalidOperationException	source contains no elements.

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

Return to top

QueryableExtensions::AverageAsync Method (IQueryable<Single>^, CancellationToken)

Asynchronously computes the average of a sequence of Single values.

Syntax

public:
[ExtensionAttribute]
static Task<float>^ AverageAsync(
	IQueryable<float>^ source,
	CancellationToken cancellationToken
)

Parameters

source: Type: System.Linq::IQueryable<Single>^
A sequence of Single values to calculate the average of.

cancellationToken: Type: System.Threading::CancellationToken
A CancellationToken to observe while waiting for the task to complete.

Return Value

Type: System.Threading.Tasks::Task<Single>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Exceptions

Exception	Condition
ArgumentNullException	source is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .
InvalidOperationException	source contains no elements.

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

Return to top

QueryableExtensions::AverageAsync<TSource> Method (IQueryable<TSource>^, Expression<Func<TSource, Decimal>^>^)

Asynchronously computes the average of a sequence of Decimal values that is obtained by invoking a projection function on each element of the input sequence.

Syntax

public:
generic<typename TSource>
[ExtensionAttribute]
[SuppressMessageAttribute("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures")]
static Task<Decimal>^ AverageAsync(
	IQueryable<TSource>^ source,
	Expression<Func<TSource, Decimal>^>^ selector
)

Parameters

source: Type: System.Linq::IQueryable<TSource>^
A sequence of values to calculate the average of.

selector: Type: System.Linq.Expressions::Expression<Func<TSource, Decimal>^>^
A projection function to apply to each element.

Return Value

Type: System.Threading.Tasks::Task<Decimal>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Type Parameters

TSource: The type of the elements of source .

Exceptions

Exception	Condition
ArgumentNullException	source or selector is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .
InvalidOperationException	source contains no elements.

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

Return to top

QueryableExtensions::AverageAsync<TSource> Method (IQueryable<TSource>^, Expression<Func<TSource, Decimal>^>^, CancellationToken)

Asynchronously computes the average of a sequence of Decimal values that is obtained by invoking a projection function on each element of the input sequence.

Syntax

public:
generic<typename TSource>
[ExtensionAttribute]
[SuppressMessageAttribute("Microsoft.Design", "CA1011:ConsiderPassingBaseTypesAsParameters")]
[SuppressMessageAttribute("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures")]
static Task<Decimal>^ AverageAsync(
	IQueryable<TSource>^ source,
	Expression<Func<TSource, Decimal>^>^ selector,
	CancellationToken cancellationToken
)

Parameters

source: Type: System.Linq::IQueryable<TSource>^
A sequence of values to calculate the average of.

selector: Type: System.Linq.Expressions::Expression<Func<TSource, Decimal>^>^
A projection function to apply to each element.

cancellationToken: Type: System.Threading::CancellationToken
A CancellationToken to observe while waiting for the task to complete.

Return Value

Type: System.Threading.Tasks::Task<Decimal>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Type Parameters

TSource: The type of the elements of source .

Exceptions

Exception	Condition
ArgumentNullException	source or selector is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .
InvalidOperationException	source contains no elements.

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

Return to top

QueryableExtensions::AverageAsync<TSource> Method (IQueryable<TSource>^, Expression<Func<TSource, Double>^>^)

Asynchronously computes the average of a sequence of Double values that is obtained by invoking a projection function on each element of the input sequence.

Syntax

public:
generic<typename TSource>
[SuppressMessageAttribute("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures")]
[ExtensionAttribute]
static Task<double>^ AverageAsync(
	IQueryable<TSource>^ source,
	Expression<Func<TSource, double>^>^ selector
)

Parameters

source: Type: System.Linq::IQueryable<TSource>^
A sequence of values to calculate the average of.

selector: Type: System.Linq.Expressions::Expression<Func<TSource, Double>^>^
A projection function to apply to each element.

Return Value

Type: System.Threading.Tasks::Task<Double>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Type Parameters

TSource: The type of the elements of source .

Exceptions

Exception	Condition
ArgumentNullException	source or selector is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .
InvalidOperationException	source contains no elements.

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

Return to top

QueryableExtensions::AverageAsync<TSource> Method (IQueryable<TSource>^, Expression<Func<TSource, Double>^>^, CancellationToken)

Asynchronously computes the average of a sequence of Double values that is obtained by invoking a projection function on each element of the input sequence.

Syntax

public:
generic<typename TSource>
[ExtensionAttribute]
[SuppressMessageAttribute("Microsoft.Design", "CA1011:ConsiderPassingBaseTypesAsParameters")]
[SuppressMessageAttribute("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures")]
static Task<double>^ AverageAsync(
	IQueryable<TSource>^ source,
	Expression<Func<TSource, double>^>^ selector,
	CancellationToken cancellationToken
)

Parameters

source: Type: System.Linq::IQueryable<TSource>^
A sequence of values to calculate the average of.

selector: Type: System.Linq.Expressions::Expression<Func<TSource, Double>^>^
A projection function to apply to each element.

cancellationToken: Type: System.Threading::CancellationToken
A CancellationToken to observe while waiting for the task to complete.

Return Value

Type: System.Threading.Tasks::Task<Double>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Type Parameters

TSource: The type of the elements of source .

Exceptions

Exception	Condition
ArgumentNullException	source or selector is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .
InvalidOperationException	source contains no elements.

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

Return to top

QueryableExtensions::AverageAsync<TSource> Method (IQueryable<TSource>^, Expression<Func<TSource, Int32>^>^)

Asynchronously computes the average of a sequence of Int32 values that is obtained by invoking a projection function on each element of the input sequence.

Syntax

public:
generic<typename TSource>
[SuppressMessageAttribute("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures")]
[ExtensionAttribute]
static Task<double>^ AverageAsync(
	IQueryable<TSource>^ source,
	Expression<Func<TSource, int>^>^ selector
)

Parameters

source: Type: System.Linq::IQueryable<TSource>^
A sequence of values to calculate the average of.

selector: Type: System.Linq.Expressions::Expression<Func<TSource, Int32>^>^
A projection function to apply to each element.

Return Value

Type: System.Threading.Tasks::Task<Double>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Type Parameters

TSource: The type of the elements of source .

Exceptions

Exception	Condition
ArgumentNullException	source or selector is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .
InvalidOperationException	source contains no elements.

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

Return to top

QueryableExtensions::AverageAsync<TSource> Method (IQueryable<TSource>^, Expression<Func<TSource, Int32>^>^, CancellationToken)

Asynchronously computes the average of a sequence of Int32 values that is obtained by invoking a projection function on each element of the input sequence.

Syntax

public:
generic<typename TSource>
[ExtensionAttribute]
[SuppressMessageAttribute("Microsoft.Design", "CA1011:ConsiderPassingBaseTypesAsParameters")]
[SuppressMessageAttribute("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures")]
static Task<double>^ AverageAsync(
	IQueryable<TSource>^ source,
	Expression<Func<TSource, int>^>^ selector,
	CancellationToken cancellationToken
)

Parameters

source: Type: System.Linq::IQueryable<TSource>^
A sequence of values to calculate the average of.

selector: Type: System.Linq.Expressions::Expression<Func<TSource, Int32>^>^
A projection function to apply to each element.

cancellationToken: Type: System.Threading::CancellationToken
A CancellationToken to observe while waiting for the task to complete.

Return Value

Type: System.Threading.Tasks::Task<Double>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Type Parameters

TSource: The type of the elements of source .

Exceptions

Exception	Condition
ArgumentNullException	source or selector is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .
InvalidOperationException	source contains no elements.

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

Return to top

QueryableExtensions::AverageAsync<TSource> Method (IQueryable<TSource>^, Expression<Func<TSource, Int64>^>^)

Asynchronously computes the average of a sequence of Int64 values that is obtained by invoking a projection function on each element of the input sequence.

Syntax

public:
generic<typename TSource>
[SuppressMessageAttribute("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures")]
[ExtensionAttribute]
static Task<double>^ AverageAsync(
	IQueryable<TSource>^ source,
	Expression<Func<TSource, long long>^>^ selector
)

Parameters

source: Type: System.Linq::IQueryable<TSource>^
A sequence of values to calculate the average of.

selector: Type: System.Linq.Expressions::Expression<Func<TSource, Int64>^>^
A projection function to apply to each element.

Return Value

Type: System.Threading.Tasks::Task<Double>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Type Parameters

TSource: The type of the elements of source .

Exceptions

Exception	Condition
ArgumentNullException	source or selector is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .
InvalidOperationException	source contains no elements.

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

Return to top

QueryableExtensions::AverageAsync<TSource> Method (IQueryable<TSource>^, Expression<Func<TSource, Int64>^>^, CancellationToken)

Asynchronously computes the average of a sequence of Int64 values that is obtained by invoking a projection function on each element of the input sequence.

Syntax

public:
generic<typename TSource>
[ExtensionAttribute]
[SuppressMessageAttribute("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures")]
[SuppressMessageAttribute("Microsoft.Design", "CA1011:ConsiderPassingBaseTypesAsParameters")]
static Task<double>^ AverageAsync(
	IQueryable<TSource>^ source,
	Expression<Func<TSource, long long>^>^ selector,
	CancellationToken cancellationToken
)

Parameters

source: Type: System.Linq::IQueryable<TSource>^
A sequence of values to calculate the average of.

selector: Type: System.Linq.Expressions::Expression<Func<TSource, Int64>^>^
A projection function to apply to each element.

cancellationToken: Type: System.Threading::CancellationToken
A CancellationToken to observe while waiting for the task to complete.

Return Value

Type: System.Threading.Tasks::Task<Double>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Type Parameters

TSource: The type of the elements of source .

Exceptions

Exception	Condition
ArgumentNullException	source or selector is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .
InvalidOperationException	source contains no elements.

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

Return to top

QueryableExtensions::AverageAsync<TSource> Method (IQueryable<TSource>^, Expression<Func<TSource, Nullable<Decimal>>^>^)

Asynchronously computes the average of a sequence of nullable Decimal values that is obtained by invoking a projection function on each element of the input sequence.

Syntax

public:
generic<typename TSource>
[SuppressMessageAttribute("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures")]
[ExtensionAttribute]
static Task<Nullable<Decimal>>^ AverageAsync(
	IQueryable<TSource>^ source,
	Expression<Func<TSource, Nullable<Decimal>>^>^ selector
)

Parameters

source: Type: System.Linq::IQueryable<TSource>^
A sequence of values to calculate the average of.

selector: Type: System.Linq.Expressions::Expression<Func<TSource, Nullable<Decimal>>^>^
A projection function to apply to each element.

Return Value

Type: System.Threading.Tasks::Task<Nullable<Decimal>>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Type Parameters

TSource: The type of the elements of source .

Exceptions

Exception	Condition
ArgumentNullException	source or selector is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

Return to top

QueryableExtensions::AverageAsync<TSource> Method (IQueryable<TSource>^, Expression<Func<TSource, Nullable<Decimal>>^>^, CancellationToken)

Asynchronously computes the average of a sequence of nullable Decimal values that is obtained by invoking a projection function on each element of the input sequence.

Syntax

public:
generic<typename TSource>
[ExtensionAttribute]
[SuppressMessageAttribute("Microsoft.Design", "CA1011:ConsiderPassingBaseTypesAsParameters")]
[SuppressMessageAttribute("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures")]
static Task<Nullable<Decimal>>^ AverageAsync(
	IQueryable<TSource>^ source,
	Expression<Func<TSource, Nullable<Decimal>>^>^ selector,
	CancellationToken cancellationToken
)

Parameters

source: Type: System.Linq::IQueryable<TSource>^
A sequence of values to calculate the average of.

selector: Type: System.Linq.Expressions::Expression<Func<TSource, Nullable<Decimal>>^>^
A projection function to apply to each element.

cancellationToken: Type: System.Threading::CancellationToken
A CancellationToken to observe while waiting for the task to complete.

Return Value

Type: System.Threading.Tasks::Task<Nullable<Decimal>>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Type Parameters

TSource: The type of the elements of source .

Exceptions

Exception	Condition
ArgumentNullException	source or selector is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

Return to top

QueryableExtensions::AverageAsync<TSource> Method (IQueryable<TSource>^, Expression<Func<TSource, Nullable<Double>>^>^)

Asynchronously computes the average of a sequence of nullable Double values that is obtained by invoking a projection function on each element of the input sequence.

Syntax

public:
generic<typename TSource>
[SuppressMessageAttribute("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures")]
[ExtensionAttribute]
static Task<Nullable<double>>^ AverageAsync(
	IQueryable<TSource>^ source,
	Expression<Func<TSource, Nullable<double>>^>^ selector
)

Parameters

source: Type: System.Linq::IQueryable<TSource>^
A sequence of values to calculate the average of.

selector: Type: System.Linq.Expressions::Expression<Func<TSource, Nullable<Double>>^>^
A projection function to apply to each element.

Return Value

Type: System.Threading.Tasks::Task<Nullable<Double>>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Type Parameters

TSource: The type of the elements of source .

Exceptions

Exception	Condition
ArgumentNullException	source or selector is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

Return to top

QueryableExtensions::AverageAsync<TSource> Method (IQueryable<TSource>^, Expression<Func<TSource, Nullable<Double>>^>^, CancellationToken)

Asynchronously computes the average of a sequence of nullable Double values that is obtained by invoking a projection function on each element of the input sequence.

Syntax

public:
generic<typename TSource>
[SuppressMessageAttribute("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures")]
[ExtensionAttribute]
[SuppressMessageAttribute("Microsoft.Design", "CA1011:ConsiderPassingBaseTypesAsParameters")]
static Task<Nullable<double>>^ AverageAsync(
	IQueryable<TSource>^ source,
	Expression<Func<TSource, Nullable<double>>^>^ selector,
	CancellationToken cancellationToken
)

Parameters

source: Type: System.Linq::IQueryable<TSource>^
A sequence of values to calculate the average of.

selector: Type: System.Linq.Expressions::Expression<Func<TSource, Nullable<Double>>^>^
A projection function to apply to each element.

cancellationToken: Type: System.Threading::CancellationToken
A CancellationToken to observe while waiting for the task to complete.

Return Value

Type: System.Threading.Tasks::Task<Nullable<Double>>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Type Parameters

TSource: The type of the elements of source .

Exceptions

Exception	Condition
ArgumentNullException	source or selector is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

Return to top

QueryableExtensions::AverageAsync<TSource> Method (IQueryable<TSource>^, Expression<Func<TSource, Nullable<Int32>>^>^)

Asynchronously computes the average of a sequence of nullable Int32 values that is obtained by invoking a projection function on each element of the input sequence.

Syntax

public:
generic<typename TSource>
[SuppressMessageAttribute("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures")]
[ExtensionAttribute]
static Task<Nullable<double>>^ AverageAsync(
	IQueryable<TSource>^ source,
	Expression<Func<TSource, Nullable<int>>^>^ selector
)

Parameters

source: Type: System.Linq::IQueryable<TSource>^
A sequence of values to calculate the average of.

selector: Type: System.Linq.Expressions::Expression<Func<TSource, Nullable<Int32>>^>^
A projection function to apply to each element.

Return Value

Type: System.Threading.Tasks::Task<Nullable<Double>>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Type Parameters

TSource: The type of the elements of source .

Exceptions

Exception	Condition
ArgumentNullException	source or selector is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

Return to top

QueryableExtensions::AverageAsync<TSource> Method (IQueryable<TSource>^, Expression<Func<TSource, Nullable<Int32>>^>^, CancellationToken)

Asynchronously computes the average of a sequence of nullable Int32 values that is obtained by invoking a projection function on each element of the input sequence.

Syntax

public:
generic<typename TSource>
[SuppressMessageAttribute("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures")]
[SuppressMessageAttribute("Microsoft.Design", "CA1011:ConsiderPassingBaseTypesAsParameters")]
[ExtensionAttribute]
static Task<Nullable<double>>^ AverageAsync(
	IQueryable<TSource>^ source,
	Expression<Func<TSource, Nullable<int>>^>^ selector,
	CancellationToken cancellationToken
)

Parameters

source: Type: System.Linq::IQueryable<TSource>^
A sequence of values to calculate the average of.

selector: Type: System.Linq.Expressions::Expression<Func<TSource, Nullable<Int32>>^>^
A projection function to apply to each element.

cancellationToken: Type: System.Threading::CancellationToken
A CancellationToken to observe while waiting for the task to complete.

Return Value

Type: System.Threading.Tasks::Task<Nullable<Double>>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Type Parameters

TSource: The type of the elements of source .

Exceptions

Exception	Condition
ArgumentNullException	source or selector is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

Return to top

QueryableExtensions::AverageAsync<TSource> Method (IQueryable<TSource>^, Expression<Func<TSource, Nullable<Int64>>^>^)

Asynchronously computes the average of a sequence of nullable Int64 values that is obtained by invoking a projection function on each element of the input sequence.

Syntax

public:
generic<typename TSource>
[SuppressMessageAttribute("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures")]
[ExtensionAttribute]
static Task<Nullable<double>>^ AverageAsync(
	IQueryable<TSource>^ source,
	Expression<Func<TSource, Nullable<long long>>^>^ selector
)

Parameters

source: Type: System.Linq::IQueryable<TSource>^
A sequence of values to calculate the average of.

selector: Type: System.Linq.Expressions::Expression<Func<TSource, Nullable<Int64>>^>^
A projection function to apply to each element.

Return Value

Type: System.Threading.Tasks::Task<Nullable<Double>>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Type Parameters

TSource: The type of the elements of source .

Exceptions

Exception	Condition
ArgumentNullException	source or selector is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

Return to top

QueryableExtensions::AverageAsync<TSource> Method (IQueryable<TSource>^, Expression<Func<TSource, Nullable<Int64>>^>^, CancellationToken)

Asynchronously computes the average of a sequence of nullable Int64 values that is obtained by invoking a projection function on each element of the input sequence.

Syntax

public:
generic<typename TSource>
[ExtensionAttribute]
[SuppressMessageAttribute("Microsoft.Design", "CA1011:ConsiderPassingBaseTypesAsParameters")]
[SuppressMessageAttribute("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures")]
static Task<Nullable<double>>^ AverageAsync(
	IQueryable<TSource>^ source,
	Expression<Func<TSource, Nullable<long long>>^>^ selector,
	CancellationToken cancellationToken
)

Parameters

source: Type: System.Linq::IQueryable<TSource>^
A sequence of values to calculate the average of.

selector: Type: System.Linq.Expressions::Expression<Func<TSource, Nullable<Int64>>^>^
A projection function to apply to each element.

cancellationToken: Type: System.Threading::CancellationToken
A CancellationToken to observe while waiting for the task to complete.

Return Value

Type: System.Threading.Tasks::Task<Nullable<Double>>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Type Parameters

TSource: The type of the elements of source .

Exceptions

Exception	Condition
ArgumentNullException	source or selector is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

Return to top

QueryableExtensions::AverageAsync<TSource> Method (IQueryable<TSource>^, Expression<Func<TSource, Nullable<Single>>^>^)

Asynchronously computes the average of a sequence of nullable Single values that is obtained by invoking a projection function on each element of the input sequence.

Syntax

public:
generic<typename TSource>
[SuppressMessageAttribute("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures")]
[ExtensionAttribute]
static Task<Nullable<float>>^ AverageAsync(
	IQueryable<TSource>^ source,
	Expression<Func<TSource, Nullable<float>>^>^ selector
)

Parameters

source: Type: System.Linq::IQueryable<TSource>^
A sequence of values to calculate the average of.

selector: Type: System.Linq.Expressions::Expression<Func<TSource, Nullable<Single>>^>^
A projection function to apply to each element.

Return Value

Type: System.Threading.Tasks::Task<Nullable<Single>>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Type Parameters

TSource: The type of the elements of source .

Exceptions

Exception	Condition
ArgumentNullException	source or selector is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

Return to top

QueryableExtensions::AverageAsync<TSource> Method (IQueryable<TSource>^, Expression<Func<TSource, Nullable<Single>>^>^, CancellationToken)

Asynchronously computes the average of a sequence of nullable Single values that is obtained by invoking a projection function on each element of the input sequence.

Syntax

public:
generic<typename TSource>
[ExtensionAttribute]
[SuppressMessageAttribute("Microsoft.Design", "CA1011:ConsiderPassingBaseTypesAsParameters")]
[SuppressMessageAttribute("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures")]
static Task<Nullable<float>>^ AverageAsync(
	IQueryable<TSource>^ source,
	Expression<Func<TSource, Nullable<float>>^>^ selector,
	CancellationToken cancellationToken
)

Parameters

source: Type: System.Linq::IQueryable<TSource>^
A sequence of values to calculate the average of.

selector: Type: System.Linq.Expressions::Expression<Func<TSource, Nullable<Single>>^>^
A projection function to apply to each element.

cancellationToken: Type: System.Threading::CancellationToken
A CancellationToken to observe while waiting for the task to complete.

Return Value

Type: System.Threading.Tasks::Task<Nullable<Single>>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Type Parameters

TSource: The type of the elements of source .

Exceptions

Exception	Condition
ArgumentNullException	source or selector is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

Return to top

QueryableExtensions::AverageAsync<TSource> Method (IQueryable<TSource>^, Expression<Func<TSource, Single>^>^)

Asynchronously computes the average of a sequence of Single values that is obtained by invoking a projection function on each element of the input sequence.

Syntax

public:
generic<typename TSource>
[ExtensionAttribute]
[SuppressMessageAttribute("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures")]
static Task<float>^ AverageAsync(
	IQueryable<TSource>^ source,
	Expression<Func<TSource, float>^>^ selector
)

Parameters

source: Type: System.Linq::IQueryable<TSource>^
A sequence of values to calculate the average of.

selector: Type: System.Linq.Expressions::Expression<Func<TSource, Single>^>^
A projection function to apply to each element.

Return Value

Type: System.Threading.Tasks::Task<Single>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Type Parameters

TSource: The type of the elements of source .

Exceptions

Exception	Condition
ArgumentNullException	source or selector is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .
InvalidOperationException	source contains no elements.

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

Return to top

QueryableExtensions::AverageAsync<TSource> Method (IQueryable<TSource>^, Expression<Func<TSource, Single>^>^, CancellationToken)

Asynchronously computes the average of a sequence of Single values that is obtained by invoking a projection function on each element of the input sequence.

Syntax

public:
generic<typename TSource>
[SuppressMessageAttribute("Microsoft.Design", "CA1011:ConsiderPassingBaseTypesAsParameters")]
[SuppressMessageAttribute("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures")]
[ExtensionAttribute]
static Task<float>^ AverageAsync(
	IQueryable<TSource>^ source,
	Expression<Func<TSource, float>^>^ selector,
	CancellationToken cancellationToken
)

Parameters

source: Type: System.Linq::IQueryable<TSource>^
A sequence of values to calculate the average of.

selector: Type: System.Linq.Expressions::Expression<Func<TSource, Single>^>^
A projection function to apply to each element.

cancellationToken: Type: System.Threading::CancellationToken
A CancellationToken to observe while waiting for the task to complete.

Return Value

Type: System.Threading.Tasks::Task<Single>^

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Type Parameters

TSource: The type of the elements of source .

Exceptions

Exception	Condition
ArgumentNullException	source or selector is null .
InvalidOperationException	source does not implement IDbAsyncQueryProvider .
InvalidOperationException	source contains no elements.

Remarks

Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.

Return to top

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