文件上傳

   這些天都在做一個貿易的程序，有些方法和技巧要記下來，以防將來忘記！今天先把文件上傳的方法記下來

   string Path;
   string FileName;
   int Po;
   long FileSize;
   string fType;
   if(F.PostedFile.FileName.Trim() != "") 

      {
         try
         {
              Path=Server.MapPath("images").ToString();
              FileName=F.PostedFile.FileName.ToString();
              fType=F.PostedFile.ContentType;
              FileSize=F.PostedFile.ContentLength;
              if(fType.Substring(0,5)!="image")
                {
                  Response.Write("PostFile is not Image!");
                  return;
                }
             Po=FileName.LastIndexOf((char)92);
             FileName=FileName.Substring(Po+1,FileName.Length -Po-1);
             ViewState["PostFileName"]=FileName;
             F.PostedFile.SaveAs(Path+");
             this.imgBookCover.Visible =true;
             this.imgBookCover.ImageUrl= "images/"+FileName;
        }
        catch
        {
        }
        finally
        {
        }
      }