CODEWITHSUNDEEP
c#silverlightsilverlight-4.0resourcedictionary
bleepzter
bleepzter

Reputation: 10015

Silverlight 4 - Retrieve a solid color brush from Resource Dictionary at runtime?

I am trying to retrieve a solid color brush pre-defined in a resource dictionary (Styles.xaml) from C#.

The problem is that when i run the following code nothing happens: 

private void LinkContinue_MouseEnter(object sender, MouseEventArgs e)
{
    this.LinkContinue.Background = (SolidColorBrush)Resources["HoverColorBrush"];
}

However if I set the background in code explicitly it runs fine:

private void LinkContinue_MouseLeave(object sender, MouseEventArgs e)
{
    this.LinkContinue.Background = new SolidColorBrush(Colors.Gray);
}

Any ideas?

Upvotes: 0

Views: 3892

Answers (2)

bleepzter
bleepzter

Reputation: 10015

So the answer was Application.Current.Resources["ResourceName"] as SolidColorBrush! Who would've known that the Resources object points to the resource dictionary for the page? UGHHH

Upvotes: 3

Rick Sladkey
Rick Sladkey

Reputation: 34250

The syntax Resources["HoverColorBrush"] looks up a resource stored in the resources of the current object. In this case, the resources of the instance of the class that contains the method LinkContinue_MouseEnter.

If you want to use the same lookup mechanism that {StaticResource HoverColorBrush} would use, you need to use the FindResource method instead:

But, as luck would have it, Silverlight does not support FindResource and so you need to either look up the resource directly in the ResourceDictionary defined in Styles.xaml, or roll your own FindResource.

Here is a blog article on this topic with sample code:

Upvotes: 4

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