List<T>.ForEach Method
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Performs the specified action on each element of the List<T>.
Assembly: mscorlib (in mscorlib.dll)
| Exception | Condition |
|---|---|
| ArgumentNullException | action is null. |
The following example demonstrates the use of the Action<T> delegate to print the contents of a List<T> object. In this example the Print method is used to display the contents of the list to the console.
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In addition to displaying the contents using the Print method, the C# example demonstrates the use of anonymous methods to display the results to the console. |
using System; using System.Collections.Generic; class Example { private static System.Windows.Controls.TextBlock outputBlock; public static void Demo(System.Windows.Controls.TextBlock outputBlock) { Example.outputBlock = outputBlock; List<String> names = new List<String>(); names.Add("Bruce"); names.Add("Alfred"); names.Add("Tim"); names.Add("Richard"); // Display the contents of the list using the Print method. names.ForEach(Print); // The following demonstrates the anonymous method feature of C# // to display the contents of the list. names.ForEach(delegate(String name) { outputBlock.Text += name + "\n"; }); } private static void Print(string s) { outputBlock.Text += s + "\n"; } } /* This code will produce output similar to the following: * Bruce * Alfred * Tim * Richard * Bruce * Alfred * Tim * Richard */
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