C# WebService 上传图片

#region 添加图片
        [WebMethod(Description = "上传图片")]
        public string getImageByte(Byte[] getByte)
        {
            string savaImageName = null;
            try
            {
                DateTime dt = DateTime.Now;
                string sFile = dt.ToShortDateString().ToString();//2005/11/5
                String file = "/images/" + sFile;//   /images/2005/11/5
                if (Directory.Exists(Server.MapPath(file)) == false)//如果文件不存在 则创建
                {
                    Directory.CreateDirectory(Server.MapPath(file));
                }
                savaImageName = file + "/" + dt.ToFileTime().ToString() + ".png";//127756416859912816
                FileStream fs = new FileStream(Server.MapPath(savaImageName), FileMode.Create, FileAccess.Write);
                fs.Write(getByte, 0, getByte.Length);
                fs.Flush();
                fs.Close();
            }
            catch (Exception e) 
            { }
            return savaImageName;

        }
        #endregion