asp.net 文件下载

来源：互联网发布：大数据存储详解编辑：程序博客网时间：2024/05/14 04:58

asp.net 文件下载：

protected void down_Click(object sender, EventArgs e)        {            string fileName = "图片悬停.rar";//客户端保存的文件名            string filePath = Server.MapPath("file/图片悬停.rar");//路径            //以字符流的形式下载文件            FileStream fs = new FileStream(filePath, FileMode.Open);            byte[] bytes = new byte[(int)fs.Length];            fs.Read(bytes, 0, bytes.Length);            fs.Close();            Response.ContentType = "application/octet-stream";            //通知浏览器下载文件而不是打开            Response.AddHeader("Content-Disposition", "attachment;   filename=" + HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8));            Response.BinaryWrite(bytes);            Response.Flush();            Response.End();                   }

asp.net mvc文件下载：

 public ActionResult FileDown()        {            //byte[] content=System.IO.File.ReadAllBytes(Server.MapPath("/file/ASP.NET MVC4开发指南.pdf"));           // Stream ftpStream = System.IO.File.Open(Server.MapPath("/file/ASP.NET MVC4开发指南.pdf"),FileMode.Open);            //return File(ftpStream, System.Net.Mime.MediaTypeNames.Application.Octet, "MVC4开发指南.pdf");            if (!System.IO.File.Exists(Server.MapPath("/file/sql.txt")))            {                return JavaScript("<script>alert('文件不存在！')</script>"); ;            }            var fs =System.IO.File.Open(Server.MapPath("/file/sql.txt"), FileMode.Open) ;            var bytes = new byte[(int)fs.Length];            fs.Read(bytes, 0, bytes.Length);            fs.Close();            return File(bytes, "application/octet-stream", "sql语句.txt");        }

asp.net mvc后台返回图片：

 public ActionResult Index()        {            //Uri url = Request.UrlReferrer;            byte[] data = System.IO.File.ReadAllBytes(Server.MapPath("/Images/heroAccent.png"));            //return File(data, @"image/jpeg", "heroAccent.png");            return File(data, @"image/jpeg");        }

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