如何将窗体客户区图象转存到Image中？

Question

我也发过类似的帖子，但是没有找到满意的答案

Answer 1

[System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")]
private static extern bool BitBlt(
IntPtr hdcDest, // handle to destination DC
int nXDest,  // x-coord of destination upper-left corner
int nYDest,  // y-coord of destination upper-left corner
int nWidth,  // width of destination rectangle
int nHeight, // height of destination rectangle
IntPtr hdcSrc,  // handle to source DC
int nXSrc,   // x-coordinate of source upper-left corner
int nYSrc,   // y-coordinate of source upper-left corner
System.Int32 dwRop  // raster operation code
); [System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")]
private static extern IntPtr  CreateDC(
              string lpszDriver,        // driver name
  string lpszDevice,        // device name
  string lpszOutput,        // not used; should be NULL
 IntPtr lpInitData // optional printer data
  ); private void PerformCapture()
{
this.Visible = false;
IntPtr dc1 = CreateDC("DISPLAY", null, null, (IntPtr)null);
Graphics g1 = Graphics.FromHdc(dc1);
MyImage = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height, g1);
Graphics g2 = Graphics.FromImage(MyImage);
Visible = false;
    dc1 = g1.GetHdc();
IntPtr dc2 = g2.GetHdc();
BitBlt(dc2, 0, 0, Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height, dc1, 0, 0, 13369376);
g1.ReleaseHdc(dc1);
g2.ReleaseHdc(dc2);
MyImage.Save(@"c:\Captured.jpg", ImageFormat.Jpeg);
Visible = true;
MessageBox.Show("Finished Saving Image");
this.Visible = true;
this.SetBounds(0, 0, Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height);
SetupCropping();
firstCrop = true;
}