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Microsoft JScript runtime error: 'null' is null or not an object

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Daniel Plomp asked on 24 Mar 2010, 10:58 AM

Hi all,

Have a question about multiple RadWindows on one page that I try to open client-side.

These are my windows defined on my page:

                    <telerik:RadWindowManager ID="windowManager" runat="server">         
                    <Windows>         
                        <telerik:RadWindow Skin="Sitefinity" InitialBehaviors="None" VisibleStatusbar="false"         
                            Width="650px" Height="725px" Behaviors="Close" ID="wdKitchenSetup" runat="server"         
                            Modal="true" Overlay="false">         
                        </telerik:RadWindow>         
                        <telerik:RadWindow Skin="Sitefinity" InitialBehaviors="None" Visible="false" Width="400px"         
                            Height="400px" Behaviors="Close" ID="wdWashupSetup" runat="server" Modal="true" Overlay="false">         
                        </telerik:RadWindow>         
                    </Windows>         
                </telerik:RadWindowManager>         

These are the js functions I use.

The ShowKitchenSetup is working okay. It shows a popup with the content of the referred url.

The ShowWashupSetup gives an error. (see thread title)

                    function ShowWashupSetup(id) {         
                     
                            // Define the ajaxManager         
                            var ajaxPanel = $find("<%= ajaxPanel.ClientID %>");         
                     
                            // Concat the arguments         
                            var arguments = "Washup, " + id;         
                     
                            // Execute the ajax request         
                            ajaxPanel.ajaxRequest(arguments);         
                     
                            // Define the window manager         
                            var manager = GetRadWindowManager();         
                     
                            // Define the url with parameters         
                            var url = "ConfigWashup.aspx?id=" + id;         
                     
                            // Get the window         
                            var wnd = manager.getWindowByName("wdWashupSetup");         
                     
                            // Set the url         
                            wnd.setUrl(url);         
                     
                            // Show the window         
                            wnd.show();         
                     
                        }         
                     
                        function ShowKitchenSetup(id) {         
                     
                            // Define the ajaxManager         
                            var ajaxPanel = $find("<%= ajaxPanel.ClientID %>");         
                     
                            // Concat the arguments         
                            var arguments = "KitchenSetup, " + id;         
                     
                            // Execute the ajax request         
                            ajaxPanel.ajaxRequest(arguments);         
                     
                            // Define the window manager         
                            var manager = GetRadWindowManager();         
                     
                            // Define the url with parameters         
                            var url = "ConfigKitchen.aspx?id=" + id;         
                     
                            // Get the window         
                            var wnd = manager.getWindowByName("wdKitchenSetup");         
                     
                            // Set the url         
                            wnd.setUrl(url);         
                     
                            // Show the window         
                            wnd.show();         
                        }         

Anyone has an idea why this won't work?

Thanks,

Daniel

9 Answers, 1 is accepted

answered on 24 Mar 2010, 01:49 PM

Hello Daniel,

The code looks OK so I assume that the reason for the problem might be in the setup that you are using. Please open a support ticket and send us a small sample project where this issue could be reproduced - we will check it right away and get back to you with a solution.

Regards,
Georgi Tunev
the Telerik team

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answered on 25 Mar 2010, 10:19 AM

Hello Daniel,

First of all I would like to apologize - I was reviewing the forum posts and I just noticed that I missed the problem in your code.
The reason for the problem is that in the second RadWindow (the one that throws the error) you have set Visible=false. When Visible is set to false, the control will not be rendered on the page at all and that is why you cannot "find" it in the JavaScript code. Remove that property (its default value is true) and all will work as expected.

Greetings,
Georgi Tunev
the Telerik team

answered on 04 Nov 2011, 05:17 PM

Hi Subhash,

If this issue is related to the RadWindow please examine the following sticky thread on opening if from the server: http://www.telerik.com/community/forums/aspnet-ajax/window/opening-radwindow-from-the-server.aspx. The important part is the utilization of the Sys.Application.Load event to ensure the controls are loaded before trying to access them. More information on that is available here.

If this issue comes from the sorting of the grid alone please post your question in the respective forum, as there are more people there that this will relate to.

Best wishes,
Marin
the Telerik team

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