How to catch the event of the window close button(red X button on window right top corner) in wpf form?
Use the Closing
event in the Window, you can handle it like this to prevent it from closing:
private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e)
{
e.Cancel = true;
}
if it is pressed confirm button in form2 do action, if it is pressed X-button do nothing:
public class Form2
{
public bool confirm { get; set; }
public Form2()
{
confirm = false;
InitializeComponent();
}
private void Confirm_Button_Click(object sender, RoutedEventArgs e)
{
//your code
confirm = true;
this.Close();
}
}
first form:
public void Form2_Closing(object sender, CancelEventArgs e)
{
if(Form2.confirm == false) return;
//your code
}
SOLUTION:
Have a flag to identify if Close() method is called from other than X icon button. (eg: IsNonCloseButtonClicked;)
Have a conditional statement inside Closing () event method which checks if the IsNonCloseButtonClicked is false.
If false, the app is trying to close itself through other than X icon button. If true, it means X icon button is clicked for closing this app.
[Sample Code]
private void buttonCloseTheApp_Click (object sender, RoutedEventArgs e) {
IsNonCloseButtonClicked = true;
this.Close (); // this will trigger the Closing () event method
}
private void MainWindow_Closing (object sender, System.ComponentModel.CancelEventArgs e) {
if (IsNonCloseButtonClicked) {
e.Cancel = !IsValidated ();
// Non X button clicked - statements
if (e.Cancel) {
IsNonCloseButtonClicked = false; // reset the flag
return;
}
} else {
// X button clicked - statements
}
}