Page.Redirect from RadWindow + RadAjaxPanel

2 posts, 0 answers
  1. Gregory
    Gregory avatar
    5 posts
    Member since:
    Jan 2011

    Posted 13 Jun 2012 Link to this post

    Hello. I present a simplified version of the implementation in which I found this problem.

    Let's suppose I have a user control, called Redirector, which only has a link button for markup, and who's job it is to redirect to a certain page:
    Public Class Redirector
    Inherits UserControl
    Private Sub lnkRedirect_Command(sender As Object, e As System.Web.UI.WebControls.CommandEventArgs) Handles lnkRedirect.Command
    End Sub
    End Class

    I want to put this on a page, inside of a RadWindow, along with some other controls. Here's the markup for my page:

    <%@ Register TagPrefix="testApp" TagName="Redirector" Src="~/Redirector.ascx" %>
    <asp:Content runat="server" ContentPlaceHolderID="ContentPlaceHolder1" >
        Page 1
        <br />
        <asp:Button ID="btnOpen" runat="server" Text="Open" />
        <trk:RadWindow runat="server" ID="MainRadWindow">
                Hello there.
                <trk:RadAjaxPanel ID="InnerAjaxPanel" runat="server">
                            <testApp:Redirector ID="Redirector1" runat="server" />
                            <asp:Button ID="btnPostBack" runat="server" Text="Postback" />
                            <asp:Label ID="lblTime" runat="server" />

    And here is the code-behind for the page:

    Public Class WebForm1
        Inherits System.Web.UI.Page
        Private Sub btnOpen_Command(sender As Object, e As System.Web.UI.WebControls.CommandEventArgs) Handles btnOpen.Command
            MainRadWindow.VisibleOnPageLoad = True
        End Sub
        Private Sub btnPostBack_Command(sender As Object, e As System.Web.UI.WebControls.CommandEventArgs) Handles btnPostBack.Command
            lblTime.Text = Now.TimeOfDay().ToString
        End Sub
    End Class

    If the user opens the RadWindow and immediately clicks the linkbutton, Page.Redirect() happens with no problem. However, if the user first clicks on btnPostback, and then clicks the linkbutton, the InnerAjaxPanel throws a javascript error.

        Microsoft JScript runtime error: Unable to get value of the property '_events': object is null or undefined

    Could you please look into this and let me know what is causing the problem, and how I could fix it?

    Thank you.
  2. Maria Ilieva
    Maria Ilieva avatar
    4017 posts

    Posted 18 Jun 2012 Link to this post

    Hello Gregory,

    Could you please try to redirect the page using the RadAjaxPanel.Redirect() method and verify if this makes any difference?

    Kind regards,
    Maria Ilieva
    the Telerik team
    If you want to get updates on new releases, tips and tricks and sneak peeks at our product labs directly from the developers working on the RadControls for ASP.NET AJAX, subscribe to their blog feed now.
Back to Top