Winform屏幕截图保存C#代码

代码如下：

 using System.Runtime.InteropServices;
 using System.Drawing.Imaging;

     [System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")]
     private static extern bool BitBlt(

                     IntPtr hdcDest,   //   目标   DC的句柄
                     int nXDest,
                     int nYDest,
                     int nWidth,
                     int nHeight,
                     IntPtr hdcSrc,     //   源DC的句柄
                     int nXSrc,
                     int nYSrc,
                     System.Int32 dwRop     //   光栅的处理数值
                       ); 

   private   void   button1_Click(object   sender,   System.EventArgs   e)
   {
   //获得当前屏幕的大小   http://www.cnblogs.com/roucheng/
   Rectangle   rect   =   new   Rectangle   (   )   ;
   rect   =   Screen.GetWorkingArea   (   this   )   ;
   //创建一个以当前屏幕为模板的图象
   Graphics   g1   =   this.CreateGraphics   (   )   ;
   //创建以屏幕大小为标准的位图
   Image   MyImage   =   new   Bitmap   (   rect.Width   ,   rect.Height   ,   g1   )   ;
   Graphics   g2   =   Graphics.FromImage   (   MyImage   )   ;
   //得到屏幕的DC
   IntPtr   dc1   =   g1.GetHdc   (   )   ;
   //得到Bitmap的DC
   IntPtr   dc2   =   g2.GetHdc   (   )   ;
   //调用此API函数，实现屏幕捕获
   BitBlt   (   dc2   ,      ,      ,   rect.Width   ,   rect.Height   ,   dc1   ,      ,      ,      )   ;
   //释放掉屏幕的DC
   g1.ReleaseHdc   (   dc1   )   ;
   //释放掉Bitmap的DC
   g2.ReleaseHdc   (   dc2   )   ;
   //以JPG文件格式来保存
   MyImage.Save   (   @"c:/Capture.jpg"   ,   ImageFormat.Jpeg   );
   MessageBox.Show   (   "当前屏幕已经保存为C盘的capture.jpg文件！"   )   ;
   }

已在项目中实现：http://hovertree.com/h/bjaf/76q5yeli.htm