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TemplateControl.OnError Method

Raises the Error event.

Namespace:  System.Web.UI
Assembly:  System.Web (in System.Web.dll)

protected virtual void OnError(
	EventArgs e


Type: System.EventArgs
An EventArgs that contains the event data.

The following code example demonstrates a possible way to use of the OnError method. It creates a string with some arguments that are not valid, which leads to an exception. Because the TemplateControl class is an abstract class, this code example was written using the Page class, which is derived from the TemplateControl class.

<%@ Page language="c#" %>
  <script language="C#" runat="server">
  void Page_Load(object sender, System.EventArgs e)
  Page.Error += new System.EventHandler(Error_Handler);
  string myString = "Hello";
  // An exception is raised because the length of 'myString' is less than '6'.
  string mySubString = myString.Substring(0,6);
  void Error_Handler(object sender,System.EventArgs e)
  Response.Write("<br><b>An Error was raised</b>");

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, 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.