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那位高手知道C#怎么调整图片的比例!然后在保存到指定路径

发布时间:2019-09-19浏览(468)

    那位高手知道C#如何调整图片的比例!然后在保存到指定路径
    如题!
      把客户段图片保存到服务器上已经好了!
      现在的问题是把 服务器的图片 先要调整比例 10 X 10然后 在把图片保存到一个指定的路径 !求高手帮忙!

    ------解决方案--------------------
    C# code
            void ResizeAndSave()
            {
                Bitmap bm = new Bitmap(PictureBox1.Image);
                Int32 x;
                Int32 y;
                int width = Val(x);
                int height = Val(y);
                Bitmap thumb = new Bitmap(width, height);
                Graphics g = Graphics.FromImage(thumb);
                g.InterpolationMode = Drawing2D.InterpolationMode.HighQualityBicubic;
                g.DrawImage(bm, new Rectangle(0, 0, width, height), new Rectangle(0, 0, bm.Width, bm.Height), GraphicsUnit.Pixel);
                g.Dispose();
                thumb.Save("C:\\newimage.bmp", System.Drawing.Imaging.ImageFormat.Bmp);
                bm.Dispose();
                thumb.Dispose();
                this.Close();
            }
    
    ------解决方案--------------------
    关注下!
    ------解决方案--------------------
    /// <summary>
    /// 生成缩略图
    /// </summary>
    /// <param name="originalImagePath">源图路径(物理路径)</param>
    /// <param name="thumbnailPath">缩略图路径(物理路径)</param>
    /// <param name="width">缩略图宽度</param>
    /// <param name="height">缩略图高度</param>
    /// <param name="mode">生成缩略图的方式</param>
    public static void MakeThumbnail(string originalImagePath, string thumbnailPath, int width, int height, string mode)
    {
    Image originalImage = Image.FromFile(originalImagePath);

    int towidth = width;
    int toheight = height;

    int x = 0;
    int y = 0;
    int ow = originalImage.Width;
    int oh = originalImage.Height;

    switch (mode)
    {
    case "HW"://指定高宽缩放(可能变形)
    break;
    case "W"://指定宽,高按比例
    toheight = originalImage.Height * width / originalImage.Width;
    break;
    case "H"://指定高,宽按比例
    towidth = originalImage.Width * height / originalImage.Height;
    break;
    case "Cut"://指定高宽裁减(不变形)
    if ((double)originalImage.Width / (double)originalImage.Height > (double)towidth / (double)toheight)
    {
    oh = originalImage.Height;
    ow = originalImage.Height * towidth / toheight;
    y = 0;
    x = (originalImage.Width - ow) / 2;
    }
    else
    {
    ow = originalImage.Width;
    oh = originalImage.Width * height / towidth;
    x = 0;
    y = (originalImage.Height - oh) / 2;
    }
    break;
    default:
    break;
    }

    //新建一个bmp图片
    Image bitmap = new System.Drawing.Bitmap(towidth, toheight);

    //新建一个画板
    Graphics g = System.Drawing.Graphics.FromImage(bitmap);

    //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;

    //清空画布并以透明背景色填充
    g.Clear(Color.Transparent);