C#前台屏幕截图

通过控件截图，通过坐标截图，通过矩形截图，全屏截图及区域截图

/// <summary>
/// 获取指定控件屏幕图像,不包括任务栏
/// </summary>
/// <param name="ctrl"></param>
/// <param name="startX"></param>
/// <param name="startY"></param>
/// <param name="destinationX"></param>
/// <param name="destinationY"></param>
/// <returns></returns>
public static Bitmap GetScreenByCtrl(Control ctrl, int startX = 0, int startY = 0, int destinationX = 0, int destinationY = 0)
{
    Rectangle ScreenArea = Screen.GetWorkingArea(ctrl);
    Bitmap bmp = new Bitmap(ScreenArea.Width, ScreenArea.Height);
    using (Graphics g = Graphics.FromImage(bmp))
    {
        //此处通过设置坐标及大小获得区域截图
        g.CopyFromScreen(startX, startY, destinationX, destinationY, new Size(ScreenArea.Width, ScreenArea.Height));
    }
    return bmp;
}
/// <summary>
/// 获取指定控件屏幕图像,不包括任务栏
/// </summary>
/// <param name="p"></param>
/// <param name="startX"></param>
/// <param name="startY"></param>
/// <param name="destinationX"></param>
/// <param name="destinationY"></param>
/// <returns></returns>
public static Bitmap GetScreenByPoint(Point p, int startX = 0, int startY = 0, int destinationX = 0, int destinationY = 0)
{
    Rectangle ScreenArea = Screen.GetWorkingArea(p);
    Bitmap bmp = new Bitmap(ScreenArea.Width, ScreenArea.Height);
    using (Graphics g = Graphics.FromImage(bmp))
    {
        //此处通过设置坐标及大小获得区域截图
        g.CopyFromScreen(startX, startY, destinationX, destinationY, new Size(ScreenArea.Width, ScreenArea.Height));
    }
    return bmp;
}

/// <summary>
/// 获取指定控件屏幕图像,不包括任务栏
/// </summary>
/// <param name="rect"></param>
/// <param name="startX"></param>
/// <param name="startY"></param>
/// <param name="destinationX"></param>
/// <param name="destinationY"></param>
/// <returns></returns>
public static Bitmap GetScreenByRect(Rectangle rect, int startX = 0, int startY = 0, int destinationX = 0, int destinationY = 0)
{
    Rectangle ScreenArea = Screen.GetWorkingArea(rect);
    Bitmap bmp = new Bitmap(ScreenArea.Width, ScreenArea.Height);
    using (Graphics g = Graphics.FromImage(bmp))
    {
        //此处通过设置坐标及大小获得区域截图
        g.CopyFromScreen(startX, startY, destinationX, destinationY, new Size(ScreenArea.Width, ScreenArea.Height));
    }
    return bmp;
}