MainPage.xaml文件代码：
<UserControl
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
x:Class="SilverlightApplication2.MainPage"
Width="640" Height="480">
<Canvas x:Name="LayoutRoot" Background="White">
<StackPanel MouseLeftButtonDown="OnMouseDown" MouseMove="OnMouseMove" MouseLeftButtonUp="OnMouseLeftButtonUp" Width="200" Height="80" Canvas.Left="20" Canvas.Top="20">
<Border BorderBrush="Red" BorderThickness="3">
<StackPanel Orientation="Horizontal" HorizontalAlignment="Center" VerticalAlignment="Center">
<Image Source="qq.gif"/>
<TextBlock Text="拖动" Margin="20" VerticalAlignment="Center"/>
</StackPanel>
</Border>
</StackPanel>
<TextBlock x:Name="status" Canvas.Top="200" Text="" Canvas.Left="60"></TextBlock>
</Canvas>
</UserControl>
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MainPage.xaml.cs文件如下：
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 SilverlightApplication2
{
public partial class MainPage : UserControl
{
public MainPage()
{
// 为初始化变量所必需
InitializeComponent();
}
//定义两个全局变量，一个用来获取鼠标的当前位置，另一个用来记录鼠标是否移动
bool trackingMouseMove = false;
Point mousePosition;
private void OnMouseDown(object sender, System.Windows.Input.MouseButtonEventArgs e)
{
// TODO: Add event handler implementation here.
FrameworkElement element = sender as FrameworkElement;
mousePosition = e.GetPosition(null);
trackingMouseMove = true;
if(null!=null)
{
element.CaptureMouse();
element.Cursor = Cursors.Hand;
}
status.Text = "按下鼠标";
}
private void OnMouseLeftButtonUp(object sender, System.Windows.Input.MouseButtonEventArgs e)
{
// TODO: Add event handler implementation here.
FrameworkElement element = sender as FrameworkElement;
trackingMouseMove = false;
element.ReleaseMouseCapture();
mousePosition.X = mousePosition.Y = 0;
element.Cursor = null;
status.Text = "鼠标释放";
}
private void OnMouseMove(object sender, System.Windows.Input.MouseEventArgs e)
{
// TODO: Add event handler implementation here.
FrameworkElement element = sender as FrameworkElement;
if(trackingMouseMove)
{
double deltaV = e.GetPosition(null).Y-mousePosition.Y;
double deltaH = e.GetPosition(null).X-mousePosition.X;
double newTop = deltaV+(double)element.GetValue(Canvas.TopProperty);
double newLeft = deltaH+(double)element.GetValue(Canvas.LeftProperty);
element.SetValue(Canvas.TopProperty,newTop);
element.SetValue(Canvas.LeftProperty,newLeft);
mousePosition = e.GetPosition(null);
}
status.Text = "鼠标移动中";
}
}
}
