This documentation is archived and is not being maintained.

TypedTableBaseExtensions.Select<TRow, S> Method

Projects each element of a TypedTableBase<T> into a new form.

Namespace:  System.Data
Assembly:  System.Data.DataSetExtensions (in System.Data.DataSetExtensions.dll)

public static EnumerableRowCollection<S> Select<TRow, S>(
	this TypedTableBase<TRow> source,
	Func<TRow, S> selector
where TRow : DataRow

Type Parameters


The type of the row elements in source, DataRow.



Type: System.Data.TypedTableBase<TRow>
A TypedTableBase<T> that contains the DataRow elements to invoke a transformation function upon.
Type: System.Func<TRow, S>
A transformation function to apply to each element.

Return Value

Type: System.Data.EnumerableRowCollection<S>
An EnumerableRowCollection<TRow> whose elements are the result of invoking the transformation function on each element of source.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type TypedTableBase<TRow>. 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).

This projection method requires the transformation function, selector, to produce one value for each value in the source sequence, source. If selector returns a value that is itself a collection, the consumer must traverse the sub-sequences manually.

.NET Framework

Supported in: 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.