Changing MainWindow background color WPF
I am trying to change the background color of the MainWindow using a dialogbox called EditColorDialog. The dialogbox can read the current background color of the main window just fine but I can't 开发者_Go百科seem to get it to change that color.
public partial class EditColorDialog : Window
{
ColorDialog colorPicker = new ColorDialog(); //this is a colorpicker
MainWindow mw = new MainWindow();
public ColorDialog()
{
InitializeComponent();
rect.Fill = mw.background; //reads the color off the main window
}
private void rect_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
colorPicker.Owner = this;
if ((bool)colorPicker.ShowDialog())
{
//selects new color from colorpicker
rect.Fill = new SolidColorBrush(colorPicker.SelectedColor);
}
}
private void OkButton_Click(object sender, RoutedEventArgs e)
{
mw.background = rect.Fill;
this.Close();
}
}
I am using this property in the main window code
public Brush background
{
get { return main_window.Background; }
set { main_window.Background = value; }
}
You create a new MainWindow every time you create such a dialog. Not a good idea.
If anything you should set the Application.MainWindow
on application startup. Then set the reference like this:
MainWindow mw = (MainWindow)Application.Current.MainWindow;
and just use nw.Background
, that property of yours seems like a non-static wrapper for a static call. Doing it this way you already have the main window.
Why does you EditColorDialog contains another new MainWindow? I guess you want a reference to the existing MainWindow which opens the EditColorDialog not a new one.Also i guess thats what H.B. meant, is you have a property *b*ackground, but your MainWindow already contains a Property called *B*ackground notice the uppercase 'B'. When closing the Dialog you can now set the Background property in your passed MainWindow.
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