实例来自“天使坠”，由灵代写介绍之：
主要核心使用.Net Silverlight SDK的类库中委托语言如（C#）与浏览器的交互之事件灵活使用，本实例适合入门的朋友了解Silverlight2.0事件的绑定方法，并且使用.Net中的属性机制的使用。并且灵活的点击状态的记录，让您更灵活的进入类库委托代码的使用方法：
using System;
using System.Collections.Generic;
using System.Linq;
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 DragDemo
{
public partial class Page : UserControl
{
public Page()
{
InitializeComponent();
}
bool isClick = false;
Point before = new Point();
double x_b;
double y_b;
private void btnTest_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
isClick = true;
// before = e.GetPosition(null);
x_b = e.GetPosition(this.layMove).X;
y_b = e.GetPosition(this.layMove).Y;
double x = (double)this.layTest.GetValue(Canvas.LeftProperty);
double y = (double)this.layTest.GetValue(Canvas.TopProperty);
this.btnTest.Content = x_b + "," + y_b ;
this.txtTest.Text=x+","+y;
}
private void btnTest_MouseMove(object sender, MouseEventArgs e)
{
if (isClick)
{
Canvas t = this.layMove;
Point point = e.GetPosition(t);
double x = (double)this.layTest.GetValue(Canvas.LeftProperty);
double y = (double)this.layTest.GetValue(Canvas.TopProperty);
this.btnTest.Content = x + "," + y + " " + this.isClick;
double x1 = point.X - x_b;
double y1 = point.Y - y_b; ;
x_b = point.X;
y_b = point.Y;
this.layTest.SetValue(Canvas.LeftProperty,x+ x1);
this.layTest.SetValue(Canvas.TopProperty,y+ y1);
this.btnTest.Content = point.X + "," + point.Y ;
this.txtTest.Text = x + "," + y + " " + ( x_b) + "," + ( y_b);
}
}
private void btnTest_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
isClick = false;
double x = (double)this.layTest.GetValue(Canvas.LeftProperty);
double y = (double)this.layTest.GetValue(Canvas.TopProperty);
this.btnTest.Content = e.GetPosition(this.layMove).X + "," + e.GetPosition(this.layMove).Y;
this.txtTest.Text = x + "," + y ;
}
private void layTest_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
}
}
}
演示效果：
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