c#中拖动图片的例子

这个问题来自论坛提问，并没有什么难度，也不需要重画内容。当然还有一种方法是通过api发送WM_SysCommand 和SC_MOVE，也就是拖动无标题窗体的方法 ，但是效果没有这个好。

using System;
using System.Drawing;
using System.Windows.Forms;
namespace WindowsApplication2
... {
public partial class Form1:Form
... {
static string strDown = @" AAACAAEAICAAAAsACQAwAQAAFgAAACgAAAAgAAAAQAAAAAEAAQAAAAAAAAIAAAAA
AAAAAAAAAAAAAAAAAAAAAAAA////AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAf4AAAD8AAAA/AAAAPwAAAH+AAAD/gAAB/8AAA//AAAN/wAACf+AAAH
9gAADbQAAA2wAAAJsAAAAIAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAA////////////////////////////////////////////8AP///gH///4
B///+Af///AD///gA///wAH//4AB//+AAf//gAD//4AA///AAP//4AH//+AH///g
D////j////////////////////////////////////////////8= " ;
static string strUp = @" AAACAAEAICAAAAoACAAwAQAAFgAAACgAAAAgAAAAQAAAAAEAAQAAAAAAAAIAAA
AAAAAAAAAAAAAAAAAAAAAAAAAA////AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAf4AAAD8AAAA/AAAAPwAAAH+AAAD/gAAB/8AAA//AAAd/wAAGf+
AAAH9gAADbYAAA2yAAAZsAAAGbAAAAGAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAA////////////////////////////////////////////8AP///
gH///4B///+Af///AD///gA///wAH//4AB//8AAf//AAD//4AA///gAP//4AD//
8AF///AB///5A////5///////////////////////////////////////8= " ;

CursorcurUp = new Cursor( new System.IO.MemoryStream(Convert.FromBase64String(strUp)));
CursorcurDown = new Cursor( new System.IO.MemoryStream(Convert.FromBase64String(strDown)));
public Form1()
... {
InitializeComponent();
this .pictureBox1.Cursor = curUp;
}

bool bDragging = false ;
PointpClicked;

private void pictureBox1_MouseDown( object sender,MouseEventArgse)
... {

bDragging = true ;
pClicked = new Point(e.X,e.Y);
this .pictureBox1.Cursor = curDown;
}

private void pictureBox1_MouseMove( object sender,MouseEventArgse)
... {
if (bDragging)
... {
PointoMoveToPoint;
oMoveToPoint = this .PointToClient(pictureBox1.PointToScreen( new Point(e.X,e.Y)));
oMoveToPoint.Offset(pClicked.X * - 1 ,pClicked.Y * - 1 );
pictureBox1.Location = oMoveToPoint;
}
}
private void pictureBox1_MouseUp( object sender,MouseEventArgse)
... {
bDragging = false ;
this .pictureBox1.Cursor = curUp;
}
}
}