WPF流布局效果（拖动）

using System;
using System.Net;
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;
using System.Windows.Interactivity;


namespace DrapControlLibrary
{
    public class DragInCanvasBehavior : Behavior
    {
        private Canvas canvas;

        protected override void OnAttached（）
        {
            base.OnAttached（）;

            // Hook up event handlers.              
            this.Associatedobject.MouseLeftButtonDown += Associatedobject_MouseLeftButtonDown;
            this.Associatedobject.MouseMove += Associatedobject_MouseMove;
            this.AssociatedObje

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2016-11-23 11:27  WpfDrag\
     目录           0  2016-11-24 10:49  WpfDrag\DrapControlLibrary\
     目录           0  2016-11-23 11:27  WpfDrag\DrapControlLibrary\bin\
     目录           0  2016-11-24 14:03  WpfDrag\DrapControlLibrary\bin\Debug\
     目录           0  2016-11-24 14:03  WpfDrag\DrapControlLibrary\bin\Debug\de\
     文件        6656  2010-07-01 13:26  WpfDrag\DrapControlLibrary\bin\Debug\de\System.Windows.Interactivity.resources.dll
     文件        7168  2016-11-24 14:03  WpfDrag\DrapControlLibrary\bin\Debug\DrapControlLibrary.dll
     文件       17920  2016-11-24 14:03  WpfDrag\DrapControlLibrary\bin\Debug\DrapControlLibrary.pdb
     目录           0  2016-11-24 14:03  WpfDrag\DrapControlLibrary\bin\Debug\en\
     文件        6656  2010-06-21 18:24  WpfDrag\DrapControlLibrary\bin\Debug\en\System.Windows.Interactivity.resources.dll
     目录           0  2016-11-24 14:03  WpfDrag\DrapControlLibrary\bin\Debug\es\
     文件        6656  2010-07-01 15:01  WpfDrag\DrapControlLibrary\bin\Debug\es\System.Windows.Interactivity.resources.dll
     目录           0  2016-11-24 14:03  WpfDrag\DrapControlLibrary\bin\Debug\fr\
     文件        6656  2010-07-01 16:40  WpfDrag\DrapControlLibrary\bin\Debug\fr\System.Windows.Interactivity.resources.dll
     目录           0  2016-11-24 14:03  WpfDrag\DrapControlLibrary\bin\Debug\it\
     文件        6656  2010-07-01 18:19  WpfDrag\DrapControlLibrary\bin\Debug\it\System.Windows.Interactivity.resources.dll
     目录           0  2016-11-24 14:03  WpfDrag\DrapControlLibrary\bin\Debug\ja\
     文件        7168  2010-07-01 10:15  WpfDrag\DrapControlLibrary\bin\Debug\ja\System.Windows.Interactivity.resources.dll
     目录           0  2016-11-24 14:03  WpfDrag\DrapControlLibrary\bin\Debug\ko\
     文件        6656  2010-07-01 11:51  WpfDrag\DrapControlLibrary\bin\Debug\ko\System.Windows.Interactivity.resources.dll
     文件       39936  2010-06-21 18:23  WpfDrag\DrapControlLibrary\bin\Debug\System.Windows.Interactivity.dll
     文件       55226  2010-05-25 15:24  WpfDrag\DrapControlLibrary\bin\Debug\System.Windows.Interactivity.xml
     目录           0  2016-11-24 14:03  WpfDrag\DrapControlLibrary\bin\Debug\zh-Hans\
     文件        6656  2010-07-01 20:01  WpfDrag\DrapControlLibrary\bin\Debug\zh-Hans\System.Windows.Interactivity.resources.dll
     目录           0  2016-11-24 14:03  WpfDrag\DrapControlLibrary\bin\Debug\zh-Hant\
     文件        6656  2010-06-22 21:37  WpfDrag\DrapControlLibrary\bin\Debug\zh-Hant\System.Windows.Interactivity.resources.dll
     目录           0  2016-11-23 11:27  WpfDrag\DrapControlLibrary\bin\Release\
     文件        3537  2016-11-24 13:41  WpfDrag\DrapControlLibrary\DrapControlLibrary.cs
     文件        2767  2016-11-24 10:58  WpfDrag\DrapControlLibrary\DrapControlLibrary.csproj
     文件        3381  2016-11-24 10:51  WpfDrag\DrapControlLibrary\DrapControlLibraryGrid.cs
     目录           0  2016-11-23 11:27  WpfDrag\DrapControlLibrary\obj\
............此处省略123个文件信息