代码就不说了，因为本地测试 ok,

服务端 就不行 ，服务器 环境 阿里云 win2008 r2  64 位

原因 是我没有这是 文件加权限 ：

左边 的 少了 权限~

代码 ：含义是 网络图片 裁剪 保存 到本地 ，本地 再 存储 到 七牛 云存储。

public static string Crop(string ImgUrl, int Width, int Height, int X, int Y)    {      string path = "C:\\DescripttionImg\\";      string Temp = "";      string path_Temp = "";      try      {        if (ImgUrl.IndexOf('?') > 0)        {          Temp = ImgUrl.Remove(ImgUrl.IndexOf('?'));          Temp = "Head_" + Temp.Substring(Temp.LastIndexOf('/') + 1);        }        else        {          Temp = "Head_" + ImgUrl.Substring(ImgUrl.LastIndexOf('/') + 1);        }        WebRequest WebReq = WebRequest.Create(ImgUrl);        WebReq.Method = "GET";        var img = System.Drawing.Image.FromStream(WebReq.GetResponse().GetResponseStream());        using (System.Drawing.Image OriginalImage = img)        {          using (Bitmap bmp = new Bitmap(Width, Height))          {            bmp.SetResolution(OriginalImage.HorizontalResolution, OriginalImage.VerticalResolution);            using (Graphics Graphic = Graphics.FromImage(bmp))            {              Graphic.SmoothingMode = SmoothingMode.AntiAlias;              Graphic.InterpolationMode = InterpolationMode.HighQualityBicubic;              Graphic.PixelOffsetMode = PixelOffsetMode.HighQuality;              Graphic.DrawImage(OriginalImage, new Rectangle(0, 0, Width, Height), X, Y, Width, Height, GraphicsUnit.Pixel);              //MemoryStream ms = new MemoryStream();              path_Temp = path + Temp;              bmp.Save(path_Temp);              WebReq.Abort();              //return ms.GetBuffer();            }          }        }        Qiniu_API.PutFile(path_Temp, Temp);        return string.Format("http://{0}/{1}", Qiniu_API.Domain, Temp);        //       }      catch (Exception ex)      {        KT_Product_ShowEntities tempconn = new KT_Product_ShowEntities();        tempconn.Err_Log.Add(new Err_Log()        {          CreateTime = DateTime.Now,          form_no = "",          Msg = ex.Message,          StackTrace = ex.StackTrace,          sys_user = "",          TargetSite = ex.TargetSite.ToString(),          UserName = "mail"        });        tempconn.SaveChanges();        throw (ex);      }      finally      {      }    }