Question

怎样使用C#进行窗口截图

Answer 1

1、启动VS2013，新建C#->WinForm项目，命名为Cs窗口截图，

2、在窗体中添加控件并布局，

3、添加Win32Api引用，
4、添加PrtWnd类，用于截取给定句柄的窗口，代码：
public class PrtWnd
{
public static Bitmap PrtWindow(IntPtr hWnd)
{
IntPtr hscrdc =Win32Api.GetWindowDC(hWnd);
Win32Api.RECT rect;
Win32Api.GetWindowRect(hWnd,out rect);
IntPtr hbitmap =Win32Api.CreateCompatibleBitmap(hscrdc, rect.right-rect .left , rect .bottom -rect .top );
IntPtr hmemdc =Win32Api.CreateCompatibleDC(hscrdc);
Win32Api.SelectObject(hmemdc, hbitmap);
Win32Api. PrintWindow(hWnd, hmemdc, 0);
Bitmap bmp = Bitmap.FromHbitmap(hbitmap);
Win32Api .DeleteDC(hscrdc);
Win32Api.DeleteDC(hmemdc);
return bmp;
}
}
5、在Form1的Btton单击事件中添加代码：
private void button1_Click(object sender, EventArgs e)
{
IntPtr handle=IntPtr .Zero ;
try
{
handle = Win32Api.FindWindow(null, textBox1.Text);
PB.Image = PrtWnd.PrtWindow(handle);
}
catch (Exception)
{
MessageBox.Show("悲剧……可能哪里出错了。|"+handle .ToString());
}
}
6、调试运行。