Asp.net(C#)-放大缩小图片尺寸

    ///

    /// 放大缩小图片尺寸
    ///

    ///
    ///
    ///
    ///
    public void PicSized(string picPath, string reSizePicPath, int iSize, ImageFormat format)
    {
        Bitmap originBmp = new Bitmap(picPath);
        int w = originBmp.Width * iSize;
        int h = originBmp.Height * iSize;
        Bitmap resizedBmp = new Bitmap(w, h);
        Graphics g = Graphics.FromImage(resizedBmp);
        //设置高质量插值法  
        g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
        //设置高质量,低速度呈现平滑程度  
        g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
        g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
        //消除锯齿
        g.SmoothingMode = SmoothingMode.AntiAlias;
        g.DrawImage(originBmp, new Rectangle(0, 0, w, h), new Rectangle(0, 0, originBmp.Width, originBmp.Height), GraphicsUnit.Pixel);
        resizedBmp.Save(reSizePicPath, format);
        g.Dispose();
        resizedBmp.Dispose();
        originBmp.Dispose();
    }