C#对被遮挡的窗体进行截图

所属分类：Linux编程

摘要

最近在做的一个项目，用的地图控件比较特殊，在地图上面自己绘制的东东没办法随地图一起导出成图片只能绕个弯,用截屏的方式了一

最近在做的一个项目，用的地图控件比较特殊，

在地图上面自己绘制的东东没办法随地图一起导出成图片

只能绕个弯,用截屏的方式了
一开始用的是这样:

/// <summary>
/// 截图
/// </summary>
/// <returns></returns>
private Image CaptureScreen()
{
Image MyImage = null;
//获得当前地图控件的大小
Graphics grapScreen = m_pFremework.Hook.CreateGraphics();
//Rectangle rect = new Rectangle();
//rect = Screen.GetWorkingArea(m_pFremework.Hook);//范围不准确,直接使用控件的属性
Rectangle rect = new Rectangle(0, 0, m_pFremework.Hook.Width, m_pFremework.Hook.Height);
MyImage = new Bitmap(rect.Width, rect.Height, grapScreen);
Graphics grapImage = Graphics.FromImage(MyImage);
IntPtr dc1 = grapScreen.GetHdc();
IntPtr dc2 = grapImage.GetHdc();
BitBlt(dc2, 0, 0, rect.Width, rect.Height, dc1, 0, 0, 13369376);
//释放掉DC
grapScreen.ReleaseHdc(dc1);
grapImage.ReleaseHdc(dc2);
return MyImage;
}

private Image CaptureScreen2()
{
Image MyImage = null;
IntPtr hdc = GetWindowDC(m_pFremework.MdiForm.Handle);
LPPOINT lphook = new LPPOINT();
lphook.x = 0;
lphook.y = 0;
ClientToScreen(m_pFremework.Hook.Handle, ref lphook);
ScreenToClient(m_pFremework.MdiForm.Handle, ref lphook);
Rectangle rect = new Rectangle(lphook.x, lphook.y, m_pFremework.Hook.Width, m_pFremework.Hook.Height);
if (hdc != IntPtr.Zero)
{
IntPtr hdcMem = CreateCompatibleDC(hdc);
if (hdcMem != IntPtr.Zero)
{
IntPtr hbitmap = CreateCompatibleBitmap(hdc, m_pFremework.MdiForm.Width, m_pFremework.MdiForm.Height);
if (hbitmap != IntPtr.Zero)
{
IntPtr ip = SelectObject(hdcMem, hbitmap);
if (ip != IntPtr.Zero)
{
bool a = PrintWindow(m_pFremework.MdiForm.Handle, hdcMem, 1);
DeleteObject(hbitmap);
Image tempImg = Image.FromHbitmap(hbitmap);
Bitmap b = new Bitmap(tempImg);
MyImage = b.Clone(rect, b.PixelFormat);
}
}
}
}
return MyImage;
}