C#抓取网络图片保存到本地

C#抓取网络图片保存到本地

System.Net.WebClient myWebClient = new System.Net.WebClient();
       //将头像保存到服务器
                    string virPath = "/Uploads/AppImage/" + user.Id + "/";
                    CreateDir(virPath);
                    string fileName = Guid.NewGuid().ToString() + ".png";
                    myWebClient.DownloadFile(headimgurl, System.Web.HttpContext.Current.Request.PhysicalApplicationPath + virPath + fileName);
                    user.Portrait = virPath + fileName;

        #region 创建目录
        /// <summary>
        /// 创建目录
        /// </summary>
        /// <param name="dir">要创建的目录路径包括目录名</param>
        public static void CreateDir(string dir)
        {
            if (dir.Length == ) return;
            if (!Directory.Exists(System.Web.HttpContext.Current.Request.PhysicalApplicationPath + "\\" + dir))
                Directory.CreateDirectory(System.Web.HttpContext.Current.Request.PhysicalApplicationPath + "\\" + dir)
                 ;
        }
        #endregion