Silverlight 非模态的悬浮窗口

       之前做WPF的时候就很想使用silverlight的ChildWindow，因为效果比较好看，而且传值也比较方便。不过开始做silverlight时就发现了ChildWindow的局限性，因为他只能以Modal Window（模式窗口）的形式进行应用，这也就是说同一时间只能有一个子窗体出现在应用程序中；另外，ChildWindow组件不能进行窗体大小的自定义缩放。所以网上看了很多文章，把学习的内容记下来吧。
      Tim Heuer提供的Non-Modal Used ChildWindow组件（非模式使用子窗体——Tim Heuer称之为浮动窗体[FloatableWindow]【点击下载源码】【点击下载我的实验项目】

1、把项目FloatableWindow添加到解决方案里，并在主项目里对其引用。

2、新建一个带CS的XAML文件(子窗口、用户控件、页都可以)，命名为FloatableWindowDemo.xaml，打开FloatableWindowDemo.xaml，写入下列代码(要和你的项目对应)：

<controls:FloatableWindow 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    xmlns:controls="clr-namespace:System.Windows.Controls;assembly=FloatableWindow" 
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
    mc:Ignorable="d" 
    x:Class="Silverlight试验.FloatableWindowDemo"
    Width="400" Height="300" Title="FloatableWindowDemo">

    <Grid x:Name="LayoutRoot" Margin="2">
        <Button x:Name="CancelButton" Content="Cancel" Click="CancelButton_Click" Width="75" Height="23" HorizontalAlignment="Right" Margin="0,230,8,8" d:LayoutOverrides="GridBox" />
        <Button x:Name="OKButton" Content="OK" Click="OKButton_Click" Width="75" Height="23" HorizontalAlignment="Right" Margin="0,230,90,8" d:LayoutOverrides="GridBox" />
    </Grid>

</controls:FloatableWindow>

3、打开FloatableWindowDemo.xaml.cs,填入以下代码(要和你的项目对应)：

using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

namespace Silverlight试验
{

	public partial class FloatableWindowDemo : FloatableWindow
    {
        public FloatableWindowDemo()
        {
            InitializeComponent();
        }
		
        private void OKButton_Click(object sender, RoutedEventArgs e)
        {
            this.DialogResult = true;
        }

        private void CancelButton_Click(object sender, RoutedEventArgs e)
        {
            this.DialogResult = false;
            //this.Close();
        }
	}
}

using System;using System.Windows;using System.Windows.Controls;using System.Windows.Documents;using System.Windows.Ink;using System.Windows.Input;using System.Windows.Media;using System.Windows.Media.Animation;using System.Windows.Shapes;namespace Silverlight试验{public partial class FloatableWindowDemo : FloatableWindow { public FloatableWindowDemo() { InitializeComponent(); } private void OKButton_Click(object sender, RoutedEventArgs e) { this.DialogResult = true; } private void CancelButton_Click(object sender, RoutedEventArgs e) { this.DialogResult = false; //this.Close(); }}}

4、然后是主窗口MainPage.xaml：

<UserControl x:Class="Silverlight试验.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    d:DesignHeight="396" d:DesignWidth="492" 
   xmlns:my="clr-namespace:Silverlight试验" xmlns:windows="clr-namespace:System.Windows.Controls;assembly=FloatableWindow">

    
    <Grid x:Name="LayoutRoot" Background="White">
        <StackPanel Height="55" Margin="134,0,110,8"  Orientation="Horizontal" VerticalAlignment="Bottom" HorizontalAlignment="Center" Width="248">
        	<Button Content="悬浮窗体"     Width="237" Margin="5" Click="Button_Click"/>
        </StackPanel>
    </Grid>
</UserControl>

5、再接着是后台MainPage.xaml.cs：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

namespace Silverlight试验
{
    public partial class MainPage : UserControl
    {
        
        public MainPage()
        {
            InitializeComponent();
			
        }

        private void Button_Click(object sender, System.Windows.RoutedEventArgs e)
        {

            FloatableWindowDemo fw = new FloatableWindowDemo();//创建浮动窗口实例
            fw.ParentLayoutRoot = LayoutRoot;//指定承载浮动窗口的父窗口的根布局元素[这里为Grid x:Name="LayoutRoot"]
            fw.Title = "Test Floatable Window";//浮动窗口标题
            //fw.Content = "The time is " + DateTime.Now.ToLongTimeString();//浮动窗体内容
            fw.Width = 300;//浮动窗口的宽度
            fw.Height = 300;//浮动窗口的高度
            fw.ResizeMode = ResizeMode.CanResize;//设置浮动窗口可自定义缩放
            fw.Show();//以非模式窗口形式打开窗体
        }
    }
}

注意要把fw.Content = "The time is " + DateTime.Now.ToLongTimeString();这一行注释掉，要不就无法显示后面自己加的内容了，我就是一开始没看见，结果弄了好半天....