GDI +错误 - 在Asp.net中加载图像。学生

Question

我在图片上传方面遇到了问题 - GDI +错误。在ASP.net中完成我的最终课程项目。请参阅下面我的图片加载完整代码：

问题行是：newimage.Save（path +“/”+ newImageName + Path.GetExtension（File1））;

你能帮我解决这个问题吗？请为初学者程序员清楚解释。

提前谢谢。

完整代码：

private void ResizeAndUpload(FileUpload fileUpload1, MainCategory add, string path)
        {
            path = HttpContext.Current.Request.PhysicalApplicationPath + "Media";
            var chars = "abcdefghijklmnopqrstuvwxyz0123456789";
            var random = new Random();
            var results = new string(Enumerable.Repeat(chars,8).Select(s => s[random.Next(s.Length)]).ToArray());
            string File1 = FileUpload1.FileName;
            newImageName = results + "_Categories_" + DateTime.Now.ToString("ddMMyyyyhhmmss");

            Bitmap original = new Bitmap(fileUpload1.FileContent);

            decimal originWidth = original.Width;
            decimal originHeight = original.Height;
            decimal ratio = originHeight / originWidth;

            int newHeight = 300;
            decimal newWidth_temp = newHeight / ratio;

            int newWidth = Convert.ToInt16(newWidth_temp);

            Bitmap newimage = new Bitmap(original,newWidth,newHeight);
            Graphics ographics = Graphics.FromImage(newimage);
            ographics.SmoothingMode = SmoothingMode.AntiAlias;
            ographics.InterpolationMode = InterpolationMode.Default;
            ographics.DrawImage(original, 0, 0, newWidth, newHeight);

            newimage.Save(path + "/" + newImageName + Path.GetExtension(File1));
            original.Dispose();
            newimage.Dispose();
            ographics.Dispose();

            add.MainCatIcon = newImageName + Path.GetExtension(File1)