Click or drag to resize
QueryableExtensionMethods.CountColumnAsync<TSource, TColumnType> Method (IQueryable<TSource>, Expression<Func<TSource, TColumnType>>, Boolean, CancellationToken)
Async variant of CountColumn.

Namespace:  SD.LLBLGen.Pro.LinqSupportClasses
Assembly:  SD.LLBLGen.Pro.ORMSupportClasses (in SD.LLBLGen.Pro.ORMSupportClasses.dll) Version: 5.3.0.0 (5.3.0)
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.Linq.IQueryable<TSource>
The source.
selector
Type: System.Linq.Expressions.Expression<Func<TSource, TColumnType>>
The selector. A projection function to apply to each element.
applyDistinct
Type: System.Boolean
if set to true, DISTINCT is applied on the set to count.
cancellationToken
Type: System.Threading.CancellationToken
The cancellation token.

Type Parameters

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

Return Value

Type: Task<Int32>
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 IQueryable<TSource>. 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