复制代码 代码如下:
using System.Windows.Forms;

namespace WinFormsApp_DragControls

{
public class DragControl

{

//待拖动的控件

private Control m_Control;

//鼠标按下时的x，y坐标

private int m_X;

private int m_Y;

public DragControl(Control control)
{
m_Control = control;

m_Control.MouseDown += new MouseEventHandler(control_MouseDown);

m_Control.MouseMove += new MouseEventHandler(contro_MouseMove);

}

private void control_MouseDown(object sender, MouseEventArgs e)
{

m_X = e.X;

m_Y = e.Y;

}
private void contro_MouseMove(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{

int x = e.X - m_X;

int y = e.Y - m_Y;

this.m_Control.Left += x;

this.m_Control.Top += y;
}
}
}
}

调用：

DragControl obj1 = new DragControl(button1);

则表示在运行的界面上，支持随意拖动button1

另外还可以进一步实现改变控件大小、GDI+实现加边界脚点、保存控件的位置到xml下次可以读取(布局)以及自动布局N个Control的算法等，想进一步了解可与本人联系，此处不多叙述..