教你使用C# 截取屏幕图像,都来做自己的屏幕录像专家
//获取屏幕1024*768图像[System.Runtime.InteropServices.DllImport("gdi32.dll")]
public static extern int BitBlt(IntPtr hdcDest, int nXDest, int nYDest, int nWidth, int nHeight, IntPtr hdcSrc, int nXSrc, int nYSrc, UInt32 dwRop);
//创建桌面句柄
[System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")]
public static extern IntPtr CreateDC(string lpszDriver, string lpszDevice, string lpszOutput, int lpInitData);
[System.Runtime.InteropServices.DllImport("gdi32.dll")]
public static extern IntPtr CreateCompatibleDC(IntPtr hdc);
//转换为本地的图像资源
[System.Runtime.InteropServices.DllImport("gdi32.dll")]
public static extern IntPtr CreateCompatibleBitmap(IntPtr hdc, int nWidth, int nHeight);
[System.Runtime.InteropServices.DllImport("gdi32.dll")]
public static extern IntPtr SelectObject(IntPtr hdc, IntPtr hgdiobj);
[System.Runtime.InteropServices.DllImport("gdi32.dll")]
public static extern int DeleteDC(IntPtr hdc);
//释放用过的设备句柄
[DllImport("user32.dll")]
public static extern bool ReleaseDC(
IntPtr hwnd, IntPtr hdc
);
//释放用过的画笔等资源
[DllImport("gdi32.dll")]
public static extern bool DeleteObject(
IntPtr hdc
);
/// <summary>
/// 截取屏幕图像
/// </summary>
/// <param name="Width">宽</param>
/// <param name="Height">高</param>
/// <param name="x">x坐标(全屏时候为0)</param>
/// <param name="y">y坐标(全屏时候为0)</param>
/// <returns></returns>
public Bitmap fullphoto(int Width,int Height,int x,int y)
{
Bitmap bitmap;
//try
//{
IntPtr hScreenDc = CreateDC("DISPLAY", null, null, 0); // 创建桌面句柄
IntPtr hMemDc = CreateCompatibleDC(hScreenDc); // 创建与桌面句柄相关连的内存DC
IntPtr hBitmap = CreateCompatibleBitmap(hScreenDc, Width, Height);
IntPtr hOldBitmap = SelectObject(hMemDc, hBitmap);
BitBlt(hMemDc, x, y, Width, Height, hScreenDc, x, y, (UInt32)0xcc0020);
IntPtr map = SelectObject(hMemDc, hOldBitmap);
bitmap = Bitmap.FromHbitmap(map);
ReleaseDC(hBitmap, hScreenDc);
DeleteDC(hScreenDc);//删除用过的对象
DeleteDC(hMemDc);//删除用过的对象
DeleteDC(hOldBitmap);
DeleteObject(hBitmap);
//}
//catch (Exception wx)
//{
// return null;
//}
// number= number +1;
// bitmap.Save("screen" + number + ".bmp");
return bitmap;
}
屏幕截图大概就是这样的,
用
bitmap.Save保存一下,看看是不是屏幕的图像,呵呵.
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