下载

一丶下载服务器图片

static void Main(string[] args)
{
        try
         {
             qds107762222_dbEntities db = new qds107762222_dbEntities();
             var zucai_Team = db.Set<zucai_team>().ToList();
             foreach (var item in zucai_Team)
             {
                 if (!String.IsNullOrEmpty(item.ImgPath))
                 {
                     string[] str = item.ImgPath.Split(new char[] { '/' });
                     var imgName = str[str.Length - 1];
                     Console.WriteLine(item.ImgPath);

                     string path = "G:\img1\" + imgName;
                     WebClient web = new WebClient();
                     if (!File.Exists(path))
                     {
                         web.DownloadFile(item.ImgPath, path);
                     }
                 }
                   
             }

         }
         catch (Exception ex)
         {

             throw ex;
         }
         Console.WriteLine("ok");
         Console.ReadKey();
}

 二丶下载文件

        public ActionResult DownloadFile(string fileRelativePath)
        {
            //1.根据文件相对路径获取文件绝对路径
            string fileAbsolutelyPath = Server.MapPath("~" + fileRelativePath);
            //2.获取文件信息
            FileInfo file = new FileInfo(fileAbsolutelyPath );

            if (file.Exists)
            {
                //3.获取指定文件名的 MIME 映射
                string contentType = MimeMapping.GetMimeMapping(fileAbsolutelyPath );
                //4.下载文件
                return File(objFileBasePath, contentType, file.Name);
            }
            else
            {
                return Content("文件不存在");
            }

        }