来自文件的图像，服务器MapPath

Question

为什么这样做：

System.Drawing.Image imageBmp =
System.Drawing.Image.FromFile(Server.MapPath("~/Images/Image.jpg"));
imageBmp.Save(Server.MapPath("~/Images2/Image.jpg"),  
System.Drawing.Imaging.ImageFormat.Bmp);
Bitmap bmp = new Bitmap(imageBmp);

这不是吗？ （文件名正确）

var fileName = Request.QueryString["name"];
System.Drawing.Image imageBmp = 
System.Drawing.Image.FromFile(Server.MapPath("~/Images/" + fileName));
imageBmp.Save(Server.MapPath("~/Images/" + fileName),
System.Drawing.Imaging.ImageFormat.Bmp);
Bitmap bmp = new Bitmap(imageBmp);

Answer 1

此行会尝试将文件保存到自身imageBmp.Save(Server.MapPath("~/Images/" + fileName), System.Drawing.Imaging.ImageFormat.Bmp);

应为imageBmp.Save(Server.MapPath("~/Images2/" + fileName), System.Drawing.Imaging.ImageFormat.Bmp);