一个新的项目想用 WPF 来做，我做了小例子，做为可行性的分析。

主要是用到grid layout 的一些方法，贴出来供以后做参考。

using System;
using System.Collections.Generic;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace WpfApplication1
{
    /// <summary>
    /// Interaction logic for Window1.xaml
    /// </summary>
    public partial class Window1 : Window
    {
        int mRow = -1;
        int mColumn = -1;
        MediaElement me;

        public Window1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, RoutedEventArgs e)
        {
          
          
        }

        private void mediaElement1_DragEnter(object sender, DragEventArgs e)
        {
            MessageBox.Show(sender.ToString());
        }

        private void play_Click(object sender, RoutedEventArgs e)
        {
          
       
        }

        private void mediaElement1_Drop(object sender, DragEventArgs e)
        {

        }

        private void mediaElement1_MouseLeave(object sender, MouseEventArgs e)
        {
          
        }

        private void mediaElement1_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
        {
            if (sender.GetType().ToString() == "System.Windows.Controls.Label")
            {
                if (mRow > -1)
                {
                    int Column = Grid.GetColumn(this.Lable1);
                    int Row = Grid.GetRow(this.Lable1);

                    //  int mRow = Grid.GetRow(this.mediaElement1);
                    //  int mColumn = Grid.GetColumn(this.mediaElement1);

                    Grid.SetColumn(me, Column);
                    Grid.SetRow(me, Row);

                    Grid.SetColumn(this.Lable1, mColumn);
                    Grid.SetRow(this.Lable1, mRow);

                    mRow = -1;
                }
            }
        }

        private void mediaElement2_DragEnter(object sender, DragEventArgs e)
        {
            
        }

        private void mediaElement1_MouseLeftButtonUp_1(object sender, MouseButtonEventArgs e)
        {
            me = sender as MediaElement;
           
            mRow = Grid.GetRow(me);
            mColumn = Grid.GetColumn(me);
        }