文件上传代码（asp.net）

Boolean fileOK = false;
        String path = "D:\\";
        //string path = "1.gif";
      
            String fileExtension =
                System.IO.Path.GetExtension(Myfile.Value).ToLower();
            string str1=System.IO.Path.GetFileName(Myfile.Value);
            String[] allowedExtensions =
                { ".gif", ".png", ".jpeg", ".jpg" };
            string temp = System.IO.Path.GetTempPath();
            string temp1 = Server.MapPath("./");
            for (int i = 0; i < allowedExtensions.Length; i++)
            {
                if (fileExtension == allowedExtensions[i])
                {
                    fileOK = true;
                }
            }
       
        if (fileOK)
        {
            try
          &nbs