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Getting the Posted Error Value

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XmlHttpPanel
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sitefinitysteve
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sitefinitysteve asked on 05 May 2010, 03:22 PM
I want to provide a "Refresh" link for the user if the Callback fails...is there a way to get the posted Error Value in the Error Callback Method somehow?

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Pero
Telerik team
answered on 10 May 2010, 12:09 PM
Hello Steve,

The error message can be retrieved using the get_errorMessage() client-side method of the event arguments. The following code alerts the error message received from the XmlHttpPanel:

.aspx
<%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<head id="Head1" runat="server">
    <title></title>
    <telerik:RadScriptBlock ID="RadScriptBlock1" runat="server">
 
        <script type="text/javascript">
            function SetValue()
            {
                var panel = $find("<%=XmlPanel1.ClientID %>");
                panel.set_value("Some_Value");
            }
 
            function OnClientResponseError(sender, args)
            {
                alert("XmlHttpPanel Value: " + sender.get_value());
 
                //Comment this line and the default error message will be alerted
                args.set_cancelErrorAlert(true);
 
                alert("XmlHttpPanel Error: " + args.get_errorMessage());
            }
        </script>
 
    </telerik:RadScriptBlock>
</head>
<body>
    <form id="form1" runat="server">
    <asp:ScriptManager ID="ScriptManager1" runat="server">
        <Scripts>
            <asp:ScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.Core.js" />
        </Scripts>
    </asp:ScriptManager>
    <asp:Button ID="Button2" runat="server" Text="Postback" />
    <input value="Set Value (callback)" onclick="SetValue(); return false;" type="button" />
    <div>
        <telerik:RadXmlHttpPanel ID="XmlPanel1" runat="server" OnServiceRequest="XmlPanel1_ServiceRequest"
            EnableClientScriptEvaluation="true" OnClientResponseError="OnClientResponseError">
        </telerik:RadXmlHttpPanel>
    </div>
    </form>
</body>
</html>

.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
 
public partial class XmlPanel_Lifecycle : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
    }
 
    protected void XmlPanel1_ServiceRequest(object sender, Telerik.Web.UI.RadXmlHttpPanelEventArgs e)
    {
        throw (new Exception("CUSTOM EXCEPTION"));
    }
 
}


All the best,
Pero
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sitefinitysteve
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answered on 10 May 2010, 01:04 PM
Thanks :)

This isn't anywhere in the docs though

Can someone quickly update it with all the functions we can use?
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Pero
Telerik team
answered on 10 May 2010, 01:30 PM
Hello Steve,

I'm glad you resolved your problem.

We will update the documentation as soon as we can. Please note that, besides the online documentation, you can use the client-side Intellisense, which in my opinion is more helpful. Here is a help article showing how to use the intellisense: http://www.telerik.com/help/aspnet-ajax/intellisense-vs2010.html.


Sincerely yours,
Pero
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sitefinitysteve
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answered on 10 May 2010, 01:33 PM
I've never been able to get intellisense to work with 2010, given up really

That link says you need to drag-drop a control onto the page, but I usually just create manually due to the gimpy design view rendering :)

Also the intellisense doesn't work in ASCX files which is where I do most of the building
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Igor
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answered on 18 Aug 2010, 06:24 PM
Hello,

Suggested solution works fine as long as i have <customErrors mode="Off"...> in web.config. If it's ON, i always receive ''There was an error in the callback." message instead of custom exception text.

Is there a workaround for my scenario to get proper error message?

Thanks.
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Pero
Telerik team
answered on 23 Aug 2010, 09:26 AM
Hi Igor,

When you have specified <customErrors/> with mode="On" the users will see the generic errors, and the custom errors, as described in the following MSDN article: http://msdn.microsoft.com/en-us/library/h0hfz6fc.aspx.

You can't work around to get the custom exception message. The only way is to set the mode to "Off" or "RemoteOnly".

Sincerely yours,
Pero
the Telerik team
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