EdmFunctions.LongCount Method (DbExpression)

 

Creates a DbFunctionExpression that invokes the canonical 'BigCount' function over the specified collection. The result type of the expression is Edm.Int64.

Namespace:   System.Data.Entity.Core.Common.CommandTrees.ExpressionBuilder
Assembly:  EntityFramework (in EntityFramework.dll)

public static DbFunctionExpression LongCount(
	this DbExpression collection
)

Parameters

collection
Type: System.Data.Entity.Core.Common.CommandTrees.DbExpression

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

Return Value

Type: System.Data.Entity.Core.Common.CommandTrees.DbFunctionExpression

A new DbFunctionExpression that produces the count value.

Exception Condition
ArgumentNullException

collection is null.

ArgumentException

No overload of the canonical 'BigCount' function accepts arguments with the result types of collection.