Can't get resource from application level

Question

My app.xaml:

<Application.Resources> <RadialGradientBrush x:Key="myBrush"> <GradientStop Color="#FFC44EC4" Offset="0" /> <GradientStop Color="#FF829CEB" Offset="1" /> <GradientStop Color="#FF793879" Offset="0.669" /> </RadialGradientBrush> </Application.Resources>

Here I'm trying to use it:

private void btnOK_Click(object sender, RoutedEventArgs e) { RadialGradientBrush b = (RadialGradientBrush)Resources["myBrush"]; //b.GradientStops[1] = new GradientStop(Colors.Red,0.0); }

But I can't use "b" cause it is null after defining. How can I get that resource?

NSGaga · Accepted Answer · 2012-05-01 18:45:29Z

You're 'drawing' from the control's resources, try one of these instead...

res = this.FindResource("myBrush"); // this 'walks' the tree and will find it res = Application.Current.Resources["myBrush"]; // or reference app resources directly res = App.Current.TryFindResource("myBrush");

hope this helps

user694833 · Accepted Answer · 2012-05-01 18:59:43Z

As you are trying to reach the resource from an btnOK_Click event, I will assume that method belongs to a window object. So, you are looking for the resource in the wrong location. You have to reference your application's resource dictionary instead.

So, my suggestion is:

private void btnOK_Click(object sender, RoutedEventArgs e) { RadialGradientBrush b = (RadialGradientBrush)Application.Current.Resources["myBrush"]; b.GradientStops[1] = new GradientStop(Colors.Red,0.0); }

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