How to close window from user control

Question

Hello
 I have a child window opened from a mainwindow, and it is drawn by my defined user control.  The user control has two buttons, cancel and save.  I am trying to close the child window when the cancel button is pressed.  As the button is defined in another class to the window I am trying to find a better way to reference the window (to call the close method).

So I have
a) Settings : Window =  (Settings.xaml) which has a user control UCSettings.xaml in it.
b) The class behind UCSettings has the button click event defined in it.  When I add the code below - it all works as expected.

I am not sure if
a) I should register the window (thought that was to allow xaml to access stuff defined in code)
b) I can get to this via the parent property of the usercontrol instance (but the child window is not the parent directly)
c) I should be raising an event ---

Any help appreciated.....thanks

There has to be a better way........

// This code is defined in the class that is my user control definition

private void SettingsCancelButton_Click(object sender, RoutedEventArgs e)

{

e.Handled = true;

if ( MessageBox.Show("Are you sure you want to cancel?", "Cancel?",

MessageBoxButton.YesNo , MessageBoxImage.Question) == MessageBoxResult.Yes)

{

// find the window that is holding this user control....and then call close on it....

foreach (Window window in Application.Current.Windows)

{

if (window.Title == "Settings")   //could also compare types here i guess.....

{

window.Close();

break;

}

}

}

Answer 1

well -

I tried raising an event and that works, created a routed event and a handler, and set it to bubble up to the window,

and its a lot of code  -still its got to be nicer and better performance,

thanks for reading - its non trivial i guess at some level (or too trivial?)

Answer 2

Hi,

I should try another solution, the command will work but this seams like a simple solution:
Use the static method on the Window class to get the Window of a specific object.

Something like this:

Window window = Window.GetWindow(this);

if (window != null)

window.Close();

You can set the DialogResult property of the Window if needed.

Answer 3

I am not sure if there is a direct way. For my projects I have a BaseUserControlClass that has a 'ParentWindow' DependencyProperty that can be set from XAML or code

public class UCBase : UserControl

{

private static DependencyProperty ParentWindowProperty;

//The parent window

public Window ParentWindow

{

set { SetValue(ParentWindowProperty, value);}

get { return (Window)GetValue(ParentWindowProperty); }

}

static UCBase()

{

FrameworkPropertyMetadata metadata = new FrameworkPropertyMetadata();

ParentWindowProperty = DependencyProperty.Register("ParentWindow", typeof(Window), typeof(UCBase), metadata, null);

}

}

Then I set it from XAML by binding to the ancestor type of Window or from code when you instantiate by myUserControl.ParentWindow = this;
Then when I want to close the hosting window, I just call this.ParentWindow.Close(); from inside the usercontrol OR myUserControl.ParentWindow.Close();
Works anyway you want!

It might be not the best way, but it works! I use it all the time.  OH of course you can just add the DependencyProperty Directly to your UserControl, if you don't use it a lot!

Hope this helps.

-noorbakhsh

Answer 4

Hello
 I have a child window opened from a mainwindow, and it is drawn by my defined user control.  The user control has two buttons, cancel and save.  I am trying to close the child window when the cancel button is pressed.  As the button is defined in another class to the window I am trying to find a better way to reference the window (to call the close method).

So I have
a) Settings : Window =  (Settings.xaml) which has a user control UCSettings.xaml in it.
b) The class behind UCSettings has the button click event defined in it.  When I add the code below - it all works as expected.

I am not sure if
a) I should register the window (thought that was to allow xaml to access stuff defined in code)
b) I can get to this via the parent property of the usercontrol instance (but the child window is not the parent directly)
c) I should be raising an event ---

Any help appreciated.....thanks

There has to be a better way........

// This code is defined in the class that is my user control definition

private void SettingsCancelButton_Click(object sender, RoutedEventArgs e)

{

e.Handled = true;

if ( MessageBox.Show("Are you sure you want to cancel?", "Cancel?",

MessageBoxButton.YesNo , MessageBoxImage.Question) == MessageBoxResult.Yes)

{

// find the window that is holding this user control....and then call close on it....

foreach (Window window in Application.Current.Windows)

{

if (window.Title == "Settings")   //could also compare types here i guess.....

{

window.Close();

break;

}

}

}

if  (window.IsActive)

{

       window.Close();

}