.Net中MVC实现上传与下载

最新推荐文章于 2022-11-24 15:45:28 发布

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最新推荐文章于 2022-11-24 15:45:28 发布

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本文链接：https://blog.youkuaiyun.com/LB_0015/article/details/102918145

这篇博客详细介绍了如何在.Net MVC框架下实现文件的上传和下载功能，包括视图层的界面设计和控制层的代码实现，特别演示了如何下载指定文件的例子。

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.Net中MVC实现上传与下载

视图层界面：

@{
    ViewBag.Title = "Home Page";
}

<div class="jumbotron">
    <h1>ASP.NET</h1>
    <p class="lead">ASP.NET is a free web framework for building great Web sites and Web applications using HTML, CSS and JavaScript.</p>
    <p><a href="https://asp.net" class="btn btn-primary btn-lg">Learn more &raquo;</a></p>
</div>
<h2>上传文件</h2>
<br />
@*new {enctype = "multipart/form-data"}将表单设置成允许文件上传或下载*@
@using (Html.BeginForm("Upload","Home", FormMethod.Post,new  {enctype = "multipart/form-data"}))
{
     <text>选择上传文件：</text>
     <input name="file" type="file" id="file"/>
     <br />
     <input type="submit" name="upload" value="上传"/>
}

<br />
<br />
<div>
    <a href="/Home/DownLoad?filepath=@ViewBag.value&filename='2.jpg'">图片2</a><br />
    <a href="/Home/DownLoad?filepath=@ViewBag.value&filename='新建文本文档.txt'">文档</a>
</div>

控制层代码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Text;
using System.IO;

namespace WebApplication1.Controllers
{
    public class HomeController : Controller
    {
        public ActionResult Index()
        {
            ViewBag.value = Server.MapPath("~/File/Upload/");
            return View();
        }

        public ActionResult About()
        {
            ViewBag.Message = "Your application description page.";

            return View();
        }

        public ActionResult Contact()
        {
            ViewBag.Message = "Your contact page.";

            return View();
        }

        public ActionResult Upload()
        {
            if (Request.Files.Count==0)
            {
                return Content("请选择上传文件");
            }
            var file = Request.Files[0];
            if (file.ContentLength==0)
            {
                return Content("请选择存在的文件");
            }
            else
            {
                string target = Server.MapPath("/") + "File/Upload/";
                string filename = file.FileName;
                file.SaveAs(target + filename);
                return Content("上传成功");
            }
        }

        public ActionResult DownLoad(string filepath,string filename)
        {
            Encoding encoding;
            string downloadfile = null;
            filename = filename.Replace("'", "");
            string browser = Request.UserAgent.ToUpper();
            downloadfile = HttpUtility.UrlEncode(filename);
            encoding = Encoding.GetEncoding("GB2312");
            //if (browser.Contains("FIREFOX"))
            //{
                
            //}
            //else
            //{
            //    downloadfile = HttpUtility.UrlEncode(filename);
            //    encoding = Encoding.Default;
            //}
            FileStream fs=new FileStream(filepath+filename, FileMode.Open);
            byte[] buffer = new byte[fs.Length];
            fs.Read(buffer, 0, buffer.Length);
            fs.Close();
            Response.Charset = "UTF-8";
            Response.ContentType = "application/octet-stream";
            Response.ContentEncoding = encoding;
            Response.AddHeader("Content-Disposition", "attachment; filename=" + downloadfile);
            Response.BinaryWrite(buffer);
            Response.Flush();
            Response.End();
            return Content("下载完成！");
        }
    }
}

演示：
在这里插入图片描述

我这里下载的是指定的文件图片2