C# – WPF Cancel Button

buttoncvisual studio 2010wpf

I am working on a WPF Application. One of my Windows has a Button called "Cancel" with its IsCancel=true. I need to show a message box with Yes/No when the user clicks Cancel or presses ESCAPE Key. If the user click Yes, the Window should continue closing but if the user clicks No, it should not close the form but continue the regular operation with the Window opened. How can I do so? Please help. Thanks in advance.

Best Answer

this will help you

void Window_Closing(object sender, CancelEventArgs e)
{
     MessageBoxResult result = MessageBox.Show(
            "msg", 
            "title", 
            MessageBoxButton.YesNo, 
            MessageBoxImage.Warning);
        if (result == MessageBoxResult.No)
        {
            // If user doesn't want to close, cancel closure
            e.Cancel = true;
        }        
}

Related Solutions

Wpf – How does the WPF Button.IsCancel property work

Yes, it only works on dialogs as a normal window has no concept of "cancelling", it's the same as DialogResult.Cancel returning from ShowDialog in WinForms.

If you wanted to close a Window with escape you could add a handler to PreviewKeyDown on the window, pickup on whether it is Key.Escape and close the form:

public MainWindow()
{
    InitializeComponent();

    this.PreviewKeyDown += new KeyEventHandler(CloseOnEscape);
}

private void CloseOnEscape(object sender, KeyEventArgs e)
{
    if (e.Key == Key.Escape)
        Close();
}

WPF and initial focus

This works, too:

<Window FocusManager.FocusedElement="{Binding ElementName=SomeElement}">

   <DataGrid x:Name="SomeElement">
     ...
   </DataGrid>
</Window>

Best Answer

Related Solutions

Wpf – How does the WPF Button.IsCancel property work

WPF and initial focus

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