TemplateControl.OnError Method (EventArgs)

 

Raises the Error event.

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

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
Available since 1.1
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