用Silverlight实现了遮罩的那种效果.

这种效果很常见的,就是当用户点击页面上某个选项或按钮,弹出一个窗口,同时窗口其他部分用半透明色给遮罩起来,不允许编辑.
用Silverlight做了一个,写下来总结一下:
1.新建一个NewWindow.xaml文件,默认代码如下:

< UserControl x:Class = " SilverlightDemo.DetailView "
    xmlns = " http://schemas.microsoft.com/client/2007 "  
    xmlns:x = " http://schemas.microsoft.com/winfx/2006/xaml "  
    >
     < Grid >

     </ Grid >
</ UserControl >

2.在Grid中添加一个 Rectangle,并设置Opacity(透明度)和Fill(填充色)属性,形如下:

< Rectangle Opacity = " 0.8 "  Fill = " LightGray " />

3.然后下面的内容就是要显示的东西了,我这里让他显示一个TextBlock和一个关闭按钮,形如下:

< Border CornerRadius = " 30 "  Background = " #ff5c7890 "  Width = " 600 "  Height = " 250 " >
     < StackPanel >
         < Grid Margin = " 30 " >
             < TextBlock Text = " {Binding FirstName} "  Foreground = " White "  FontSize = " 20 " />
             < Button Content = " close "  Click = " Button_Click "  Width = " 50 "  Height = " 30 " />
         </ Grid >
     </ StackPanel >
</ Border >

4.关闭按钮的Click方法如下,也就是设置Visibility的值而已.形如下:

private void Button_Click(object sender, RoutedEventArgs e)
{
    Visibility = Visibility.Collapsed;
}

5.OK,NewWindow.xaml文件就到这里,下面只要在需要遮罩的文件中使用就可以了,我这里是在page.xaml文件中单击按钮是弹出遮罩.所以:
首先,引入命名空间,具体的要看你的项目,我这里是:

xmlns:app = " clr-namespace:SilverlightDemo "

然后直接在page.xaml页面中插入自定义控件NewWindow,记得设置属性Visibility为Collapsed,让他在页面载入时是不弹出来的.形如下:

< app:DetailView x:Name = " detailView "  Grid.RowSpan = " 2 "  Visibility = " Collapsed " />

然后在按钮的Click事件中把Visibility值设置成 Visible就可以了.形如下:

private void Button1_OnClick(object sender, RoutedEventArgs e){
  detailView.Visibility  =  Visibility.Visible;
}

啰啰嗦嗦的讲了一堆,其实就是很简单的问题.呵呵!