QueryableExtensions::AnyAsync Method
Asynchronously determines whether a sequence contains any elements.
Assembly: EntityFramework (in EntityFramework.dll)
| Name | Description | |
|---|---|---|
  | AnyAsync<TSource>(IQueryable<TSource>^) | Asynchronously determines whether a sequence contains any elements. |
| AnyAsync<TSource>(IQueryable<TSource>^, CancellationToken) | Asynchronously determines whether a sequence contains any elements. |
| AnyAsync<TSource>(IQueryable<TSource>^, Expression<Func<TSource, Boolean>^>^) | Asynchronously determines whether any element of a sequence satisfies a condition. |
| AnyAsync<TSource>(IQueryable<TSource>^, Expression<Func<TSource, Boolean>^>^, CancellationToken) | Asynchronously determines whether any element of a sequence satisfies a condition. |
QueryableExtensions::AnyAsync<TSource> Method (IQueryable<TSource>^)
Asynchronously determines whether a sequence contains any elements.
public: generic<typename TSource> [ExtensionAttribute] static Task<bool>^ AnyAsync( IQueryable<TSource>^ source )
Parameters
- source
-
Type:
System.Linq::IQueryable<TSource>^
An IQueryable<T> to check for being empty.
Return Value
Type: System.Threading.Tasks::Task<Boolean>^A task that represents the asynchronous operation. The task result contains true if the source sequence contains any elements; otherwise, false.
Type Parameters
- TSource
The type of the elements of source.
| Exception | Condition |
|---|---|
| ArgumentNullException | source is null . |
| InvalidOperationException | source does not implement IDbAsyncQueryProvider . |
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.
QueryableExtensions::AnyAsync<TSource> Method (IQueryable<TSource>^, CancellationToken)
Asynchronously determines whether a sequence contains any elements.
public: generic<typename TSource> [ExtensionAttribute] static Task<bool>^ AnyAsync( IQueryable<TSource>^ source, CancellationToken cancellationToken )
Parameters
- source
-
Type:
System.Linq::IQueryable<TSource>^
An IQueryable<T> to check for being empty.
- cancellationToken
-
Type:
System.Threading::CancellationToken
A CancellationToken to observe while waiting for the task to complete.
Return Value
Type: System.Threading.Tasks::Task<Boolean>^A task that represents the asynchronous operation. The task result contains true if the source sequence contains any elements; otherwise, false.
Type Parameters
- TSource
The type of the elements of source.
| Exception | Condition |
|---|---|
| ArgumentNullException | source is null . |
| InvalidOperationException | source does not implement IDbAsyncQueryProvider . |
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.
QueryableExtensions::AnyAsync<TSource> Method (IQueryable<TSource>^, Expression<Func<TSource, Boolean>^>^)
Asynchronously determines whether any element of a sequence satisfies a condition.
public: generic<typename TSource> [ExtensionAttribute] [SuppressMessageAttribute("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures")] static Task<bool>^ AnyAsync( IQueryable<TSource>^ source, Expression<Func<TSource, bool>^>^ predicate )
Parameters
- source
-
Type:
System.Linq::IQueryable<TSource>^
An IQueryable<T> whose elements to test for a condition.
- predicate
-
Type:
System.Linq.Expressions::Expression<Func<TSource, Boolean>^>^
A function to test each element for a condition.
Return Value
Type: System.Threading.Tasks::Task<Boolean>^A task that represents the asynchronous operation. The task result contains true if any elements in the source sequence pass the test in the specified predicate; otherwise, false.
Type Parameters
- TSource
The type of the elements of source.
| Exception | Condition |
|---|---|
| ArgumentNullException | source or predicate is null . |
| InvalidOperationException | source does not implement IDbAsyncQueryProvider . |
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.
QueryableExtensions::AnyAsync<TSource> Method (IQueryable<TSource>^, Expression<Func<TSource, Boolean>^>^, CancellationToken)
Asynchronously determines whether any element of a sequence satisfies a condition.
public: generic<typename TSource> [SuppressMessageAttribute("Microsoft.Design", "CA1011:ConsiderPassingBaseTypesAsParameters")] [SuppressMessageAttribute("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures")] [ExtensionAttribute] static Task<bool>^ AnyAsync( IQueryable<TSource>^ source, Expression<Func<TSource, bool>^>^ predicate, CancellationToken cancellationToken )
Parameters
- source
-
Type:
System.Linq::IQueryable<TSource>^
An IQueryable<T> whose elements to test for a condition.
- predicate
-
Type:
System.Linq.Expressions::Expression<Func<TSource, Boolean>^>^
A function to test each element for a condition.
- cancellationToken
-
Type:
System.Threading::CancellationToken
A CancellationToken to observe while waiting for the task to complete.
Return Value
Type: System.Threading.Tasks::Task<Boolean>^A task that represents the asynchronous operation. The task result contains true if any elements in the source sequence pass the test in the specified predicate; otherwise, false.
Type Parameters
- TSource
The type of the elements of source.
| Exception | Condition |
|---|---|
| ArgumentNullException | source or predicate is null . |
| InvalidOperationException | source does not implement IDbAsyncQueryProvider . |
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.