 /// <summary>
 /// 在圖片上畫框
/// </summary>
/// <param name="bmp">原始圖</param>
/// <param name="p0">起始點(diǎn)</param>
/// <param name="p1">終止點(diǎn)</param>
/// <param name="RectColor">矩形框顏色</param>
/// <param name="LineWidth">矩形框邊界</param>
 /// <returns></returns>
 public static Bitmap DrawRectangleInPicture(Bitmap bmp, Point p0, Point p1, Color RectColor, int LineWidth,DashStyle ds)
 {
if (bmp == null) return null;
Graphics g = Graphics.FromImage(bmp);
Brush brush = new SolidBrush(RectColor);
Pen pen = new Pen(brush, LineWidth);
pen.DashStyle = ds;
g.DrawRectangle(pen, new Rectangle(p0.X, p0.Y, Math.Abs(p0.X - p1.X), Math.Abs(p0.Y - p1.Y)));
g.Dispose();
return bmp;
}
/// <summary>
/// 在圖片上畫橢圓
/// </summary>
/// <param name="bmp"></param>
/// <param name="p0"></param>
/// <param name="RectColor"></param>
/// <param name="LineWidth"></param>
/// <param name="ds"></param>
/// <returns></returns>
public static Bitmap DrawRoundInPicture(Bitmap bmp, Point p0, Point p1, Color RectColor, int LineWidth, DashStyle ds)
{
if (bmp == null) return null;
Graphics g = Graphics.FromImage(bmp);
Brush brush = new SolidBrush(RectColor);
Pen pen = new Pen(brush, LineWidth);
pen.DashStyle = ds;
g.DrawEllipse(pen, new Rectangle(p0.X, p0.Y, Math.Abs(p0.X - p1.X), Math.Abs(p0.Y - p1.Y)));
g.Dispose();
return bmp;
}
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