QueryableExtensionMethods.CountColumn(TSource, TColumnType) Method (IQueryable(TSource), Expression(Func(TSource, TColumnType)))

QueryableExtensionMethodsCountColumnTSource, TColumnType Method (IQueryableTSource, ExpressionFuncTSource, TColumnType)

returns the number of values in the set specified by selector which is 1 column wide.

Namespace: SD.LLBLGen.Pro.LinqSupportClasses
Assembly: SD.LLBLGen.Pro.ORMSupportClasses (in SD.LLBLGen.Pro.ORMSupportClasses.dll) Version: 5.3.0.0 (5.3.0)

Syntax

Copy

public static int CountColumn<TSource, TColumnType>(
	this IQueryable<TSource> source,
	Expression<Func<TSource, TColumnType>> selector
)

<ExtensionAttribute>
Public Shared Function CountColumn(Of TSource, TColumnType) ( 
	source As IQueryable(Of TSource),
	selector As Expression(Of Func(Of TSource, TColumnType))
) As Integer

Parameters

source: Type: System.LinqIQueryableTSource
The source.
selector: Type: System.Linq.ExpressionsExpressionFuncTSource, TColumnType
The selector. A projection function to apply to each element.

Type Parameters

TSource: The type of the source.
TColumnType: The type of the column.

Return Value

Type: Int32
The number of values.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IQueryableTSource. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).

Remarks

doesn't apply DISTINCT to the set to count. If you want the total of distinct values, use the overload which accepts a boolean.

Reference

QueryableExtensionMethods Class

CountColumn Overload

SD.LLBLGen.Pro.LinqSupportClasses Namespace