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Cancel in a previewClosedEvent doesn't Work (Q1)

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Ludovic Alcala asked on 23 Mar 2010, 11:55 AM

Hello,
i use a radwindow, and when i cancel the PreviewClosed Event, it loop two times in my event,
Any idea ?

My Code :
this.PreviewClosed += new EventHandler<WindowPreviewClosedEventArgs>(RadWindow_PreviewClosed);

private void RadWindow_PreviewClosed(object sender, WindowPreviewClosedEventArgs e)
        {
                if (validatorManager.globalFormChange)
                {
                    e.Cancel = true;
                    RadWindow.Confirm(new DialogParameters
                    {
                        Header = "Enregistrement",
                        Content = "Souhaitez vous enregistrer avant de quitter?",
                        IconContent = "",
                        OkButtonContent = "Oui",
                        CancelButtonContent = "Non",
                        Closed = new EventHandler<WindowClosedEventArgs>(OnPreviewClosePopup)
                    });
                    return;
                }
            }
        }

I use Q1 2010 309.

Thank you.

7 Answers, 1 is accepted

Accepted

answered on 05 Apr 2010, 04:32 PM

Hi,

We're having this issue too.
I cancel on the PreviewClosedEvent, tell my UIManager component that the view thats hosted inside this window wants to close and pass a callback that the view's viewmodel will call which confirms if the window can close or not.

As a work around I'm applying states to the window to know exactly when it can close.

    
                    void window_PreviewClosed(object sender, WindowPreviewClosedEventArgs e)  
        
                    {  
        
                        var window = sender as RadWindow;  
        
                        var view = GetView(window);  
        
                        if (window.Tag == "CAN_CLOSE")  
        
                            return;  
        
                        if (window.Tag == "CLOSING")  
        
                        {  
        
                            e.Cancel = true;  
        
                            return;  
        
                        }  
        
                        //window.Tag is null here  
        
                        e.Cancel = true;  
        
                        window.Tag = "CLOSING";  
        
                        manager.TryClose(view, res => 
        
                        {  
        
                            if (res)  
        
                            {  
        
                                window.Tag = "CAN_CLOSE";  
        
                                window.Close(); //forces PreviewClosed, hence CAN_CLOSE  
        
                            }  
        
                            window.Tag = null;  
        
                        });  
        
                    }

It's not elegant but it works..