Cannot implicitly convert type RadWindow to Window

[Sergiy]

Hello, I have got RadWindow created in xaml.
When I try to create this Rad window in code

                var mainWindow = new MainWindow(); // IT'S RADWINDOW
                Application.Current.MainWindow = mainWindow;
                Close();
                Application.Current.MainWindow.Show();

I have an error as:
Cannot implicitly convert type 'SomeProjectName.SomeFolder.MainWindow' to 'System.Windows.Window'

How to solve this problem?

[Yana]

Hello Sergiy,

Please check the following kb article which demonstrates how you can use RadWindow as main Window in WPF:
http://www.telerik.com/support/kb/wpf/window/radwindow-as-main-window.aspx

Also the approach is discussed in details in the following forum thread:
http://www.telerik.com/community/forums/wpf/window/radwindow-as-mainwindow.aspx 

Kind regards,
Yana
the Telerik team

[Ron]

I'm having the same issue. The RadWindow cannot be used as a typical Window object. These referenced links only show how to set up the RadWindow, not how to use the RadWindow as a Window object in the code-behind.  Can someone please answer how to use the RadWindow as a Window object in the code-behind?

[Yana]

Hi Ron,

Currently this is the only way to use RadWindow as main Window that we provide. Could you please explain in more details the issues you're experiencing with the approach?

Regards,
Yana
the Telerik team

[Anatoliy]

I have the same Exception with using WPF + MEF... RadWindow can't be converted in Bootstraper:

protected override void InitializeShell()
        {
            base.InitializeShell();
            Application.Current.MainWindow = (Window) Shell;
            Application.Current.MainWindow.Show();
        }

Waiting for some advises!

Best regards, Anatoliy

[Sueleyman]

Hi Anatoliy,

 did you find a soultion for this ?

[Kalin]

Hello Sueleyman,

Please find attached a sample project demonstrating how to use RadWindow as MainWindow in a PRISM 5 application.

Hope this helps.

Regards,
Kalin
Telerik

[Jason]

Has anyone found a solution for this? I'm having a lot of trouble setting the parent Window of my RadWindow since I can't get it to recognize the RadWindow as a System.Windows.Window.

[Jason]

To elaborate further, the issue is that while Telerik says that RadWindow is a "Window" object, it's not entirely accurate, since RadWindow does not inherit the System.Windows.Window class, instead it inherits System.Windows.WindowBase, which means that if you try and pass a RadWindow to functions like the WPF / Win32 interoperability helper System.Windows.Interop.WindowInteropHelper it fails because the WindowInteropHelper expects an object of the "Window" class, not "WindowBase".

So is there a way of getting a RadWindow as a System.Windows.Window object?

[Kalin]

Hi Jason,

RadWindow is hosted in transparent WPF Window. You could get the host Window at run time as shown below:

var wpfWindow = Window.GetWindow(radWindow);

If you need it before it is shown, you could use the HostCreated event of RadWindow - you will be able to find the WPF Window instance in the event arguments.

Hope this helps.

Regards,
Kalin
Progress Telerik

[Jason]

Thank you a ton Kalin! That solved it for me. Had to use the hostcreated event, but from there I could set my radWindow's owner using the interop helper. Cheers!