EdmFunctions.Count(DbExpression) Method

Reference

Definition

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

Assembly:: System.Data.Entity.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

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

Поділитися через