Hi Marc,
To do this we can manually catch each exception and trigger the Error
event. Below is the sample:
ascx:
<%@ Control Language="C#" AutoEventWireup="true"
CodeBehind="WebUserControl1.ascx.cs"
Inherits="WebApplication1.WebUserControl1" %>
<asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Click
Me" />
ascx.cs:
namespace WebApplication1
{
public partial class WebUserControl1 : System.Web.UI.UserControl
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
try
{
throw new Exception("hello world!");
}
catch (Exception ex) {
this.OnError(new WebUserControlEventArgs() { Message =
ex.Message });
}
}
}
public class WebUserControlEventArgs : EventArgs {
public string Message { get; set; }
}
}
aspx:
<uc1:WebUserControl1 ID="WebUserControl11" runat="server"/>
aspx.cs:
namespace WebApplication1
{
public partial class WebForm1 : System.Web.UI.Page
{
protected void Page_Init(object sender, EventArgs e)
{
this.WebUserControl11.Error+=new
EventHandler(WebUserControl11_Error);
}
void WebUserControl11_Error(object sender, EventArgs e)
{
Response.Write("Exception is thrown in WebUserControl11");
}
}
}
In each event handler of web user control we can use a try..catch block to
wrap our code. And trigger the Error event in the catch block to notify the
Page that uses the web user control.
If you have additional questions please feel free to ask.
Regards,
Allen Chen
Microsoft Online Support
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