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TemplateControl.OnError Method

Raises the Error event.

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

'Declaration
Protected Overridable Sub OnError ( _
	e As EventArgs _
)

Parameters

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="VB" %>
 <html>
  <head>
  <script language="VB" runat="server">
  Sub Page_Load(sender as object, e as System.EventArgs)
  AddHandler Page.Error, AddressOf Error_Handler
  try
  Dim myString as string = "Hello"
  'An exception is raised because the length of 'myString' is less than '6'.
  Dim mySubString as string= myString.Substring(0,6)
  catch e1 As Exception
  OnError (EventArgs.Empty)
  End try
  End Sub
  Sub Error_Handler(sender as object,e as System.EventArgs)
  Response.Write("<br><b>An Error was raised</b>")
  End Sub
  </script>
  </head>
 </html>

.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.
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