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RadWindow is duplicating on multiple creations

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Window

This is a migrated thread and some comments may be shown as answers.

Shane Grant asked on 26 Dec 2009, 01:23 AM

I wasn't sure the best way to describe this, but here is what I have:

I have a RadMenu with Help -> About
When I click about here is the code that is fired:

    
                    protected void aboutClick() 
        
                    { 
        
                        RadWindow windowAbout = new RadWindow(); 
        
                        // Set the window properties  
        
                        windowAbout.NavigateUrl = "~/windows/about.aspx"; 
        
                        windowAbout.ID = "RadWindowAbout"; 
        
                        windowAbout.VisibleOnPageLoad = true;  
        
                        windowAbout.Title = "About"; 
        
                        windowAbout.VisibleStatusbar = false; 
        
                        //windowAbout.Animation = WindowAnimation.FlyIn; 
        
                        windowAbout.Width = new Unit(400, UnitType.Pixel); 
        
                        windowAbout.Height = new Unit(310, UnitType.Pixel); 
        
                        //windowAbout.Modal = true; 
        
                        windowAbout.DestroyOnClose = true; 
        
                        windowAbout.Behaviors = WindowBehaviors.Close | WindowBehaviors.Move; 
        
                        RadWindowManager1.Windows.Add(windowAbout); 
        
                    }

With or without making the window modal the first time I select about everything is fine. The second time I select it I get two instances of the window, and third time I get three.

Any help is appreciated.

16 Answers, 1 is accepted

answered on 28 Dec 2009, 09:52 AM

Hello Shane Grant,

I examined your code and I also believe that the only problem in this case could be the fact that you have used the VisibleOnPageLoad property with ViewState enabled and setting EnableViewState="false" for the RadWindowManager should fix this.

On a side note, if you want to dynamically create a RadWindow object on the client you should use the radopen function - e.g call it in the client click event of the menu item, this will create the new RadWindow. You can examine the following demos to get a better overview about this function:

http://demos.telerik.com/aspnet-ajax/window/examples/radopen/defaultcs.aspx
http://demos.telerik.com/aspnet-ajax/window/examples/windowmanager/defaultcs.aspx
http://demos.telerik.com/aspnet-ajax/controls/examples/integration/gridandwindow/defaultcs.aspx?product=window
http://demos.telerik.com/aspnet-ajax/window/examples/usingurlforserverarguments/defaultcs.aspx

Greetings,
Svetlina
the Telerik team

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answered on 30 Dec 2009, 07:09 AM

Svetlina,

Setting EnableViewState="false" on the RadWindowManager does stop it from duplicating the About Window, but I am using the same RadWindowManager for other windows that I need to persist through postbacks, and this causes all windows to vanish on any page postback.

My workaround was as follows:

1. I added a second RadWindowManager:

    
                <telerik:RadWindowManager ID="RadWindowManagerDocumentArea" runat="server" RestrictionZoneID="RestrictionZone"  
        
                    ShowContentDuringLoad="false"> 
        
                </telerik:RadWindowManager> 
        
                <telerik:RadWindowManager ID="RadWindowManagerPopupWindows" runat="server" RestrictionZoneID="RestrictionZone"  
        
                    ShowContentDuringLoad="false" EnableViewState="false"> 
        
                </telerik:RadWindowManager>

Then I simply add the About window into the second manager like this:

    
                    protected void aboutClick() 
        
                    { 
        
                        RadWindow windowAbout = new RadWindow(); 
        
                        // Set the window properties  
        
                        windowAbout.NavigateUrl = "~/windows/about.aspx"; 
        
                        windowAbout.ID = "RadWindowAbout"; 
        
                        windowAbout.VisibleOnPageLoad = true; // Set this property to True for showing window from code  
        
                        windowAbout.Title = "About"; 
        
                        windowAbout.VisibleStatusbar = false; 
        
                        //windowAbout.Animation = WindowAnimation.FlyIn; 
        
                        windowAbout.Width = new Unit(400, UnitType.Pixel); 
        
                        windowAbout.Height = new Unit(310, UnitType.Pixel); 
        
                        windowAbout.Modal = true; 
        
                        windowAbout.EnableViewState = false; 
        
                        windowAbout.DestroyOnClose = true; 
        
                        windowAbout.Behaviors = WindowBehaviors.Close; 
        
                        RadWindowManagerPopupWindows.Windows.Add(windowAbout); 
        
                    }

This seems to resolve the duplication issue.

Thank you for your help

Accepted

answered on 30 Dec 2009, 10:56 AM

Hello Shane,

In this case I recommend not to use a second RadWindowManager but to use one RadWindow with EnableViewState="false" and one RadWindowManager for all the other RadWindows with ViewState enabled. I recommend this because the RadWindowManager control is designed to be a singleton and if you have more than one on your page only one of them will be "active" depedning on the initialization time of the managers and this can cause problems. However, there is absolutely no problem to have as many additional separate RadWindows on the page and if you use a separate RadWindow, setting EnableViewState="false" for it will solve the VisibleOnPageLoad problem.

Best wishes,
Svetlina
the Telerik team

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answered on 30 Jun 2010, 06:14 PM

I am having the same issue with this. I have a radMenu that calls code-behind that adds it to my RadWindowManager1's windows collection. In-page, my RadWindowManager is set up like:

    
            <telerik:RadWindowManager ID="RadWindowManager1" runat="server" Behaviors="Resize, Minimize, Close, Pin, Move, Reload" 
        
                             KeepInScreenBounds="True" VisibleOnPageLoad="False" 
        
                            Behavior="Resize, Minimize, Close, Pin, Move, Reload" InitialBehavior="None" 
        
                            Height="520px" RestrictionZoneID="pnlMainContent" VisibleStatusbar="False"   
        
                            Width="870px" DestroyOnClose="True" EnableViewState="False">  
        
                        </telerik:RadWindowManager>

This is great because it no longer duplicates, but now (as this guy mentions) I am unable to have multiple windows shown through a postback. What am I doing wrong?

answered on 05 Jul 2010, 12:27 PM

Hello Matt,

The behavior that you experience is expected. DestroyOnClose destroys RadWindow's client object - it does not affect the control on the server. RadWindow does not provide the requested functionality out of the box (because this would mean that you would need to make a trip to the server every time you click the [X] button).
To implement the desired logic, we would suggest to manually clear the Windows collection on the server when needed.

I hope this information helps.

Regards,
Georgi Tunev
the Telerik team

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answered on 16 Feb 2011, 06:27 AM

I have problem with my RadWindow, it only opens the first time being clicked. If it's clicked the second time and so on, it will load empty window.

Please advice, and below is my code.

Thank you,
Mustika

function

openWin2() {

window.radopen(

null, "RadWinAttachment");

return false;

}

telerik:RadWindowManager ID="RadWindowManager2" runat="server">

<telerik:RadWindow ID="RadWinAttachment" runat="server" Skin="<%$appSettings:TelerikSkin%>"

DestroyOnClose="true" ReloadOnShow="true" EnableEmbeddedSkins="false" Width="500px" Height="350px" NavigateUrl="~/Pages/AttachmentNew_Prop.aspx"

Modal="true" VisibleTitlebar="true" Behaviors="Close">

</telerik:RadWindow>

</Windows>

telerik:RadWindowManager>

asp:LinkButton ID="LinkButton1" OnClientClick="return openWin2();" runat="server">Add Attachment to this Claim</asp:LinkButton>

answered on 16 Feb 2011, 07:18 AM

Hi Nengah,

This happens when you set DestroyOnClose to true. When this property is set to true, RadWindow’s object will be destroyed once the window is closed. This, however, means that you will not be able to open that same RadWindow again until the whole page is reloaded.
In such scenario, it will be best to either set all needed properties (width, height, modality, etc.) to the RadWindowManager or as an alternative – to use the client-side API and set them when opening the RadWindow.

Kind regards,
Georgi Tunev
the Telerik team

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