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

Async variant of CountColumn.

Namespace:  SD.LLBLGen.Pro.LinqSupportClasses
Assembly:  SD.LLBLGen.Pro.ORMSupportClasses (in SD.LLBLGen.Pro.ORMSupportClasses.dll) Version: 5.11.0.0 (5.11.23.1114)
Syntax
public static Task<int> CountColumnAsync<TSource, TColumnType>(
	this IQueryable<TSource> source,
	Expression<Func<TSource, TColumnType>> selector,
	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.
cancellationToken
Type: System.ThreadingCancellationToken
The cancellation token.

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.
See Also