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QueryableExtensionMethodsCountColumnAsyncTSource, TColumnType Method (IQueryableTSource, ExpressionFuncTSource, TColumnType, Boolean, CancellationToken)

Async variant of CountColumn.

Namespace:  SD.LLBLGen.Pro.LinqSupportClasses
Assembly:  SD.LLBLGen.Pro.ORMSupportClasses (in SD.LLBLGen.Pro.ORMSupportClasses.dll) Version: 5.6.0.0 (5.6.19.0117)
Syntax
public static Task<int> CountColumnAsync<TSource, TColumnType>(
	this IQueryable<TSource> source,
	Expression<Func<TSource, TColumnType>> selector,
	bool applyDistinct,
	CancellationToken cancellationToken
)

Parameters

source
Type: System.LinqIQueryableTSource
The source.
selector
Type: System.Linq.ExpressionsExpressionFuncTSource, TColumnType
The selector. A projection function to apply to each element.
applyDistinct
Type: SystemBoolean
if set to true, DISTINCT is applied on the set to count.
cancellationToken
Type: System.ThreadingCancellationToken
The cancellation token.

Type Parameters

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

Return Value

Type: TaskInt32
The number of distinct 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).
See Also