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POasp.net custom control used in user control (ascx) - how to catch on load error?
 

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  1. POasp.net custom control used in user control (ascx) - how to catch on load error?
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    <p>I have a custom control that is placed on a user control(ascx). In the load of the custom control happens an error. I would like to "catch" this error in the user control(ascx). How could I do this?</p> <p>Default aspx:</p> <pre><code>&lt;%@ Page Language="vb" AutoEventWireup="false" CodeBehind="Default.aspx.vb" Inherits="WebApplication1._Default" %&gt; &lt;%@ Register src="WebUserControl1.ascx" tagname="WebUserControl1" tagprefix="uc1" %&gt; &lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"&gt; &lt;html xmlns="http://www.w3.org/1999/xhtml"&gt; &lt;head runat="server"&gt;&lt;title&gt;&lt;/title&gt;&lt;/head&gt; &lt;body&gt;&lt;form id="form1" runat="server"&gt; &lt;asp:Label runat="server" ID="test" Text="hello world"&gt;&lt;/asp:Label&gt; &lt;uc1:WebUserControl1 ID="WebUserControl11" runat="server" /&gt; &lt;/form&gt;&lt;/body&gt;&lt;/html&gt; </code></pre> <p>WebUserControl1.ascx:</p> <pre><code>&lt;%@ Control Language="vb" AutoEventWireup="false" CodeBehind="WebUserControl1.ascx.vb" Inherits="WebApplication1.WebUserControl1" %&gt; &lt;%@ Register tagPrefix="test" namespace="WebApplication1" assembly="WebApplication1" %&gt; &lt;test:MyControl runat="server" ID="test2" Text="test"&gt;&lt;/test:MyControl&gt; </code></pre> <p>WebUserControl1.ascx.vb:</p> <pre><code>Public Class WebUserControl1 Inherits System.Web.UI.UserControl Protected Overrides Sub OnLoad(ByVal e As System.EventArgs) Try 'Doesn't work! MyBase.OnLoad(e) Catch ex As Exception handleException(ex) End Try End Sub Private Sub Page_Error(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Error 'Doesn't work! handleException(New Exception()) End Sub Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load End Sub Private Sub handleException(ByVal ex As Exception) Me.Controls.Add(New LiteralControl("ex.tostring")) End Sub End Class </code></pre> <p>And last but not least: my custom control:</p> <p>MyControl.vb:</p> <pre><code>Public Class MyControl Inherits System.Web.UI.WebControls.Label Protected Overrides Sub OnLoad(ByVal e As System.EventArgs) Throw New Exception("") MyBase.OnLoad(e) End Sub End Class </code></pre> <p>I would like to be able to catch this error, in the *.ascx file this seems not be possible? Or is it?</p>
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    1. PTQuestion
    1. USJohn Saunders
    1. USJDC
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      1. POasp.net custom control used in user control (ascx) - how to catch on load error?
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      1. VTUpMod
    1. COThis isn't going to be possible because the user control doesn't initiate the `OnLoad` - the only place to catch this exception is in `Application_Error`.
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      1. POasp.net custom control used in user control (ascx) - how to catch on load error?
      1. USMike Perrenoud
 

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