C#实现在运行窗体中拖拽组件

1.首先要把想要拖拽的控件和窗体的AllowDrop属性设置为true

2.添加要拖拽控件的MouseDown事件：

                private void button1_MouseDown(object sender, MouseEventArgs e)
                 {
                              DoDragDrop(button1,DragDropEffects.Move); //DoDragDrop是一个函数
                 }

3.添加窗体Form1的DragDrop事件：

         private void Form1_DragDrop(object sender, DragEventArgs e)
        {
            object data = e.Data.GetData(typeof(Button));
            if (data == button1)
            {
                button1.Top = this.PointToClient(new Point(e.X, e.Y)).Y;
                button1.Left = this.PointToClient(new Point(e.X, e.Y)).X;
            }          
        }

4.添加窗体Form1的DragEnterDragEnter事件：

private void Form1_DragEnter(object sender, DragEventArgs e)
        {
            object data = e.Data.GetData(typeof(Button));
            if (data != null)
            {
                e.Effect = DragDropEffects.Move;
            }
            else e.Effect = DragDropEffects.None;
        }

5.运行一下就可以移动Button1这个控件了