bitmap保存问题

[冰镇宝贝321]

求大神帮忙，我读取一张图片，想修改大小保存到另个文件夹中，报错
关键代码如下：

    public static void MakeThumNail(string originalImagePath, string thumNailPath, int width, int height, string model)
    {
        System.Drawing.Image originalImage = System.Drawing.Image.FromFile(originalImagePath);

        int thumWidth = width; //缩略图的宽度
        int thumHeight = height; //缩略图的高度

        int x = 0;
        int y = 0;

        int originalWidth = originalImage.Width; //原始图片的宽度
        int originalHeight = originalImage.Height; //原始图片的高度

        switch (model)
        {
            case "HW": //指定高宽缩放,可能变形
                break;
            case "W": //指定宽度,高度按照比例缩放
                thumHeight = originalImage.Height * width / originalImage.Width;
                break;
            case "H": //指定高度,宽度按照等比例缩放
                thumWidth = originalImage.Width * height / originalImage.Height;
                break;
            case "Cut":
                if ((double)originalImage.Width / (double)originalImage.Height > (double)thumWidth / (double)thumHeight)
                {
                    originalHeight = originalImage.Height;
                    originalWidth = originalImage.Height * thumWidth / thumHeight;
                    y = 0;
                    x = (originalImage.Width - originalWidth) / 2;
                }
                else
                {
                    originalWidth = originalImage.Width;
                    originalHeight = originalWidth * height / thumWidth;
                    x = 0;
                    y = (originalImage.Height - originalHeight) / 2;
                }
                break;
            default:
                break;
        }

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

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

        //设置高质量查值法
        graphic.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;

        //设置高质量，低速度呈现平滑程度
        graphic.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;

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

        //在指定位置并且按指定大小绘制原图片的指定部分
        graphic.DrawImage(originalImage, new System.Drawing.Rectangle(0, 0, thumWidth, thumHeight),
                          new System.Drawing.Rectangle(x, y, originalWidth, originalHeight),
                          System.Drawing.GraphicsUnit.Pixel);
        try
        {
            if (!Directory.Exists(thumNailPath))
            {
                Directory.CreateDirectory(thumNailPath);
            }
            bitmap.Save(thumNailPath, System.Drawing.Imaging.ImageFormat.Jpeg);

        }
        catch (Exception ex)
        {
            throw ex;
        }
        finally
        {
            originalImage.Dispose();
            bitmap.Dispose();
            graphic.Dispose();
        }
    }

bitmap.Save(thumNailPath, System.Drawing.Imaging.ImageFormat.Jpeg);
就是到这一句，就产生错误，GDI+ 中发生一般性错误。

去拜读和骨骼都查了，有的说没权限，有的说没释放，但是我个人还是认为是没释放，求大神帮忙看下

[冰镇宝贝321]

没人帮我

[insus]

Refer this: http://www.cnblogs.com/insus/articles/2060601.html

[冰镇宝贝321]

引用 2 楼 insus 的回复:

Refer this:
http://www.cnblogs.com/insus/articles/2060601.html

亲，您这个是不错，问题用了您的那个保存，还是出错的啊

[冰镇宝贝321]

在线等，求帮忙啊

[uinatlex]

if (!Directory.Exists(thumNailPath))
            {
                Directory.CreateDirectory(thumNailPath);
            }
            bitmap.Save(thumNailPath, System.Drawing.Imaging.ImageFormat.Jpeg);

这个是什么意思，判断路径不存在后生成文件夹，你后面又把文件SAVE到这个路径，当然要报错 删掉 或者更改

[零点逸族]

是不是没有指定图片名称？

[冰镇宝贝321]

引用 5 楼 uinatlex 的回复:

if (!Directory.Exists(thumNailPath))
            {
                Directory.CreateDirectory(thumNailPath);
            }
            bitmap.Save(thumNailPath, System.Drawing.Imaging.ImageFormat.Jpeg);

这个是什么意思，判断路径不存在后生成文件夹，你后面又把文件SAVE到这个路径，当然要报错 删掉 或者更改

亲 这个回答是正确的，我也发现了，是路径不对，谢谢了 结贴