这是我用来捕获屏幕和鼠标光标作为屏幕截图的类。但是我想以某种方式使如果表单位于屏幕中间,则不要捕获它捕获屏幕和表单后面的区域,而不是捕获它本身的表单。
即使表单在前面,并且我在应用程序运行时单击按钮或更改表单中的某些内容,也不要捕获它,只需继续捕获表单后面的区域,就像表单不存在一样。
using System;
using System.Runtime.InteropServices;
using System.Drawing;
using System.Drawing.Imaging;
using System.Windows.Forms;
namespace ScreenShotDemo
{
public class ScreenCapture
{
[StructLayout(LayoutKind.Sequential)]
struct CURSORINFO
{
public Int32 cbSize;
public Int32 flags;
public IntPtr hCursor;
public POINTAPI ptScreenPos;
}
[StructLayout(LayoutKind.Sequential)]
struct POINTAPI
{
public int x;
public int y;
}
[DllImport("user32.dll")]
static extern bool GetCursorInfo(out CURSORINFO pci);
[DllImport("user32.dll")]
static extern bool DrawIcon(IntPtr hDC, int X, int Y, IntPtr hIcon);
const Int32 CURSOR_SHOWING = 0x00000001;
public static Bitmap CaptureScreen(bool CaptureMouse)
{
Bitmap result = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height, PixelFormat.Format32bppArgb);
try
{
using (Graphics g = Graphics.FromImage(result))
{
g.CopyFromScreen(0, 0, 0, 0, Screen.PrimaryScreen.Bounds.Size, CopyPixelOperation.SourceCopy);
if (CaptureMouse)
{
CURSORINFO pci;
pci.cbSize = System.Runtime.InteropServices.Marshal.SizeOf(typeof(CURSORINFO));
if (GetCursorInfo(out pci))
{
if (pci.flags == CURSOR_SHOWING)
{
DrawIcon(g.GetHdc(), pci.ptScreenPos.x, pci.ptScreenPos.y, pci.hCursor);
g.ReleaseHdc();
}
}
}
}
}
catch
{
result = null;
}
return result;
}
}
我的意思是,当它运行时我会看到表单,并且我将能够更改单击按钮但捕获的屏幕截图,如果我将使用 Paint 对其进行编辑,我将看不到表单。
这是在 Form1 中我如何进行捕获:
private void StartRecording_Click(object sender, EventArgs e)
{
timer1.Enabled = true;
}
和 timer1 滴答事件:
private void timer1_Tick(object sender, EventArgs e)
{
using (bitmap = (Bitmap)ScreenCapture.CaptureScreen(true))
{
ffmp.PushFrame(bitmap);
}
}
此行进行实际捕获:使用 (bitmap = (Bitmap)ScreenCapture.CaptureScreen(true))