EdmFunctions.Count(DbExpression) Method

Reference

Definition

Namespace:: System.Data.Common.CommandTrees.ExpressionBuilder

Assembly:: System.Data.Entity.dll

Important

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Creates a DbFunctionExpression that invokes the canonical 'Count' function over the specified collection. The result type of the expression is Edm.Int32.

public:
[System::Runtime::CompilerServices::Extension]
 static System::Data::Common::CommandTrees::DbFunctionExpression ^ Count(System::Data::Common::CommandTrees::DbExpression ^ collection);

public static System.Data.Common.CommandTrees.DbFunctionExpression Count (this System.Data.Common.CommandTrees.DbExpression collection);

static member Count : System.Data.Common.CommandTrees.DbExpression -> System.Data.Common.CommandTrees.DbFunctionExpression

<Extension()>
Public Function Count (collection As DbExpression) As DbFunctionExpression

Parameters

collection: DbExpression

An expression that specifies the collection over which the count value should be computed.

Returns

DbFunctionExpression

A new DbFunctionExpression that produces the count value.

Exceptions

ArgumentNullException

collection is null.

ArgumentException

collection is invalid.

Applies to