检测在Silverlight控件的焦点 [英] Detecting a control's focus in Silverlight

问题描述

有没有办法告诉控制（特别是一个System.Windows.Controls.TextBox）是否被聚焦在Silverlight？我正在寻找类似如下（你会在常规的.NET应用程序见）：

  textBox.Focused 
  

这看起来似乎简单，琐碎，从控制离开了，但我不能找到一个回答任何地方。

更新

一个稍微更优雅的解决方案，结合罗布的回答，是创建一个扩展方法，像这样：

 公共静态布尔IsFocused（该控制的控制）
 {
返回FocusManager.GetFocusedElement（）==控制; 
} 
  

解决方案

您必须使用<一个HREF =htt​​p://msdn.microsoft.com/en-us/library/system.windows.input.focusmanager%5Fmembers%28VS.95%29.aspx>的FocusManager

 布尔b = FocusManager.GetFocusedElement（）== textBox中; 
  

Is there any way to tell whether a control (specifically a System.Windows.Controls.TextBox) is focused in Silverlight? I'm looking for something like the following (what you would see in a regular .Net application):

textBox.Focused

This seems like something simple and trivial to leave out from a control, and yet I can't find an answer anywhere.

Update

A slightly more elegant solution, incorporating Rob's answer, is to create an extension method like so:

public static bool IsFocused( this Control control )
{
    return FocusManager.GetFocusedElement() == control;
}

解决方案

You have to use FocusManager

bool b = FocusManager.GetFocusedElement() == textBox;

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