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

QueryableExtensionMethodsCountColumnAsyncTSource, TColumnType Method (IQueryableTSource, ExpressionFuncTSource, TColumnType)

Async variant of CountColumn

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 Task<int> CountColumnAsync<TSource, TColumnType>(
	this IQueryable<TSource> source,
	Expression<Func<TSource, TColumnType>> selector
)

<ExtensionAttribute>
Public Shared Function CountColumnAsync(Of TSource, TColumnType) ( 
	source As IQueryable(Of TSource),
	selector As Expression(Of Func(Of TSource, TColumnType))
) As Task(Of 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: TaskInt32
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

CountColumnAsync Overload

SD.LLBLGen.Pro.LinqSupportClasses Namespace