WPF Closing a Window from the a UserControl MVVM - wpf

Question

I currently have a problem with my Binding because upon pressing a Button, it should close a certain Window but it doesn't. This is a more detailed description of the situation:
In my Application, I have the following button:
Upon pressing it, a new Window is launched. It contains a UserControl and is used as a DialogBox to confirm that the user wants to save all changes. This is the code that launches the DialogBox (Window). Note that the window is passed by reference:
private void OpenRegisterDialog(string changes)
{
window = new Window
{
Title = "Confirmation",
ResizeMode = ResizeMode.NoResize,
WindowStartupLocation = WindowStartupLocation.CenterScreen
};
SaveConfirmationDg = new SaveConfirmationDialog(ref window);
window.ShowDialog();
}
Note that the Content of the Window has not been set yet, I will document this after.
This is how the DialogBox looks like (upon pressing OUI or NON, the window should be closing but it isn't):
This is the xaml used to generate the DialogBox which is a UserControl nested into our DialogBox Window.
SaveConfirmation.xaml
<Grid HorizontalAlignment="Center" VerticalAlignment="Center" Height="200" Width="350" Background="Black">
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Grid Grid.Row="0">
<TextBlock HorizontalAlignment="Center" VerticalAlignment="Center" Foreground="White" Text="Voulez-vous enregistrer les modifications?" />
</Grid>
<Grid Grid.Row="1">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Grid Grid.Column="0">
<Button Foreground="White" Content="OUI" Command="{Binding Close}" CommandParameter="close" Margin="10,0" />
</Grid>
<Grid Grid.Column="1">
<Button Foreground="White" Content="NON" Command="{Binding Close}" CommandParameter="close" Margin="10,0" />
</Grid>
</Grid>
As I am using the MVVM pattern, I am setting the DataContext to SaveConfirmationDialogViewModel.cs in the Code-Behind (Note that the window created is passed as a reference).
public SaveConfirmationDialog(ref Window window)
{
InitializeComponent();
DataContext = new SaveConfirmationDialogViewModel(ref window);
}
Finally, here is how I create and assign the Content of the DialogBox:
SaveConfirmationDialogViewModel.Cs
class SaveConfirmationDialogViewModel : ViewModelBase
{
public Window CurrentWindow;
public MyICommand<string> Close { get; private set; }
SaveConfirmationDialog SaveConfDg;
public SaveConfirmationDialogViewModel(ref Window window)
{
SaveConfDg = new SaveConfirmationDialog();
window.Content = SaveConfDg;
window.SizeToContent = SizeToContent.WidthAndHeight;
CurrentWindow = window;
Close = new MyICommand<string>(ExitDialog);
}
private void ExitDialog(string exit)
{
CurrentWindow.Close();
}
}
Note that CurrentWindow is assigned a reference of window to be able to use it outside of the Constructor. After pressing the OUI and NON buttons the ExitDialog method of the Close command should be used to close the Window but I see it's not even called because I have checked by placing a breakpoint.
I am thinking the problem might be with the DataContext. Does anyone have a clue what the problem might
be?
Thanks in advance!

Answer 1

Finally, the problem was really simple, I just needed to comment out the first line of my Constructor and pass the SaveConfirmationDialog object from the Code-Behind
SaveConfirmationDialogViewModel.cs
public SaveConfirmationDialogViewModel(ref Window window, SaveConfirmationDialog SaveConfDg)
{
//SaveConfDg = new SaveConfirmationDialog();
window.Content = SaveConfDg;
window.SizeToContent = SizeToContent.WidthAndHeight;
CurrentWindow = window;
Close = new MyICommand<string>(ExitDialog);
}
SaveConfirmationDialog.xaml.cs
public SaveConfirmationDialog(ref Window window)
{
InitializeComponent();
//Added this as second parameter
DataContext = new SaveConfirmationDialogViewModel(ref window, this);
}