Silverlight 4 - 在运行时从资源字典中检索纯色画笔？
我正在尝试从 C# 检索资源字典 (Styles.xaml) 中预定义的纯色画笔。
问题是，当我运行以下代码时，什么也没有发生：
private void LinkContinue_MouseEnter(object sender, MouseEventArgs e)
{
this.LinkContinue.Background = (SolidColorBrush)Resources["HoverColorBrush"];
}
但是，如果我在代码中显式设置背景，它运行得很好：
private void LinkContinue_MouseLeave(object sender, MouseEventArgs e)
{
this.LinkContinue.Background = new SolidColorBrush(Colors.Gray);
}
有什么想法吗？
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?
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语法
Resources["HoverColorBrush"]查找存储在当前对象的资源中的资源。在本例中，是包含方法LinkContinue_MouseEnter的类实例的资源。如果您想使用与
{StaticResource HoverColorBrush}相同的查找机制，则需要使用FindResource方法：FrameworkElement.FindResource 方法但是，如幸运的是，Silverlight 不支持
FindResource，因此您需要直接在Styles.xaml中定义的ResourceDictionary中查找资源，或推出您自己的FindResource。以下是关于此主题的博客文章和示例代码：
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 methodLinkContinue_MouseEnter.If you want to use the same lookup mechanism that
{StaticResource HoverColorBrush}would use, you need to use theFindResourcemethod instead:FrameworkElement.FindResource MethodBut, as luck would have it, Silverlight does not support
FindResourceand so you need to either look up the resource directly in theResourceDictionarydefined inStyles.xaml, or roll your ownFindResource.Here is a blog article on this topic with sample code:
所以答案是
Application.Current.Resources["ResourceName"] as SolidColorBrush！谁会知道 Resources 对象指向页面的资源字典？呃呃呃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