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Displaying a Custom Dialog in WPF Before the Main Application Window is Shown

, 27 Feb 2010 CPOL
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In a WPF application, the first window opened is deemed to be the main window. In order to prevent an application from closing when an initial dialog is closed, use the Application.Current.ShutdownMode property as demonstrated in the following example:protected override void...
In a WPF application, the first window opened is deemed to be the main window. In order to prevent an application from closing when an initial dialog is closed, use the Application.Current.ShutdownMode property as demonstrated in the following example:
 
protected override void OnStartup(StartupEventArgs e)
 {
            Application.Current.ShutdownMode = ShutdownMode.OnExplicitShutdown;
            CustomDialog dialog = new CustomDialog ();
            bool? dialogResult = auth.ShowDialog();
            /* Handle results */
            if (dialogResult.HasValue && dialogResult.Value)
            {
                base.OnStartup(e);
            }
            else
            {
                this.Shutdown();
            }
}

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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Daniel Vaughan
President Outcoder
Switzerland Switzerland
Daniel Vaughan is a Microsoft MVP and co-founder of Outcoder, a Swiss software and consulting company dedicated to creating best-of-breed user experiences and leading-edge back-end solutions, using the Microsoft stack of technologies--in particular WPF, WinRT, Windows Phone, and also Xamarin.Forms.
 
Daniel is the author of Windows Phone 8 Unleashed and Windows Phone 7.5 Unleashed, both published by SAMS.
 
Daniel is the developer behind several acclaimed Windows Phone apps including Surfy, Intellicam, and Splashbox; and is the creator of a number of popular open-source projects including Calcium SDK, and Clog.
 
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