Select(TRow, S) Method

EnumerableRowCollectionExtensions.Select<TRow, S> Method (EnumerableRowCollection<TRow>, Func<TRow, S>)


Projects each element of an EnumerableRowCollection<TRow> into a new form. This API supports the .NET Framework infrastructure and is not intended to be used directly from your code.

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

public static EnumerableRowCollection<S> Select<TRow, S>(
	this EnumerableRowCollection<TRow> source,
	Func<TRow, S> selector


Type: System.Data.EnumerableRowCollection<TRow>

An EnumerableRowCollection<TRow> containing the DataRow elements to invoke a transform function upon.

Type: System.Func<TRow, S>

A transform function to apply to each element.

Return Value

Type: System.Data.EnumerableRowCollection<S>

An EnumerableRowCollection<TRow> whose elements are the result of invoking the transform function on each element of source.

Type Parameters


The type of the row elements in source, typically DataRow.


The type that TRow will be transformed into.

This method is implemented by using deferred execution. The immediate return value is an object that stores all the information that is required to perform the action. The query represented by this method is not executed until the object is enumerated either by calling its GetEnumerator method directly or by using foreach in Visual C# or For Each in Visual Basic.

This projection method requires the transform function, selector, to produce one value for each value in the source sequence, source. If selector returns a value that is itself a collection, it is up to the consumer to traverse the subsequences manually.

.NET Framework
Available since 3.5
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