Prevent Application From Shutdown on Certain Condition

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Hi all,

How to preventing application to shutdown from based xaml? I have Application.xaml which have Me.Startup and Me.Exit to handle object initialization and dispose. If any page on my program is close by Alt+F4, I will check at Me.Exit with certain condition. If True, the it continue dispose object and exit. But when False, it should cancel the exit and stay on last page.

How to do this? I create application interface using Page.xaml not Window.xaml and from what I search, most of it show on Windows_Closing.. What I need is cancelling when False just like Winforms which can use e.Cancel = True but in WPF.

Kindly help. Thanks

UPDATED
: RUNNING INTERFACE USING PAGE.XAML NOT WINDOW.XAML

Posted 16-Dec-14 20:41pm

Luiey Ichigo

Updated 23-Dec-14 17:55pm

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TheRealSteveJudge · Answer 1 · 2014-12-16T22:01:00

You can do like this:

C#

<window x:class="WpfApplication7.MainWindow" xmlns:x="#unknown">
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525" Closing="Window_Closing">
    <grid>
        
    </grid>
</window>

C#

using System.Windows;

namespace WpfApplication7
{
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e)
        {
            e.Cancel = true;
        }
    }
}

You must handle the Closing event by setting e.Cancel = true.
Of course you must check your condition before setting e.Cancel = true!