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QueryableExtensionMethodsCountColumnTSource, TColumnType Method (IQueryableTSource, ExpressionFuncTSource, TColumnType, Boolean)

returns the number of distinct 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: 5.9.0.0 (5.9.0)
Syntax
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public static int CountColumn<TSource, TColumnType>(
	this IQueryable<TSource> source,
	Expression<Func<TSource, TColumnType>> selector,
	bool applyDistinct
)

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.

Type Parameters

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

Return Value

Type: 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 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