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ASP.NET MVC实现文件下载_实用技巧_
2023-05-24
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简介 ASP.NET MVC实现文件下载_实用技巧_
思路
点击一个链接,把该文件的Id传递给控制器方法,遍历文件夹所有文件,根据ID找到对应文件,并返回FileResult类型。
与文件相关的Model:
namespace MvcApplication1.Models { public class FileForDownload { public int Id { get; set; } public string Name { get; set; } public string Path { get; set; } } }文件帮助类
写一个针对文件的帮助类,遍历指定文件夹的所有文件,返回FileForDownload集合类型。在项目根目录下创建Files文件夹,存放下载文件。
using System.Collections.Generic; using System.IO; using System.Web.Hosting; using MvcApplication1.Models; namespace MvcApplication1.Helper { public class FileHelper { public List GetFiles() { List result = new List(); DirectoryInfo dirInfo = new DirectoryInfo(HostingEnvironment.MapPath("~/Files")); int i = 0; foreach (var item in dirInfo.GetFiles()) { result.Add(new FileForDownload() { Id = i + 1, Name = item.Name, Path = dirInfo.FullName + @"\" + item.Name }); i++; } return result; } } } HomeController中:
using System; using System.Linq; using System.Web.Mvc; using MvcApplication1.Helper; namespace MvcApplication1.Controllers { public class HomeController : Controller { private FileHelper helper; public HomeController() { helper = new FileHelper(); } public ActionResult Index() { var files = helper.GetFiles(); return View(files); } public FileResult DownloadFile(string id) { var fId = Convert.ToInt32(id); var files = helper.GetFiles(); string fileName = (from f in files where f.Id == fId select f.Path).FirstOrDefault(); string contentType = "application/pdf"; return File(fileName, contentType, "Report.pdf"); } } }Home/Index.cshtml中:
@model IEnumerable@{ ViewBag.Title = "Index"; Layout = "~/Views/Shared/_Layout.cshtml"; } @foreach (var item in Model) {
} @Html.DisplayFor(modelItem => item.Id) @Html.DisplayFor(modelItem => item.Name) @Html.ActionLink("下载", "DownloadFile", new { id = item.Id })
到此这篇关于ASP.NET MVC实现文件下载的文章就介绍到这了。希望对大家的学习有所帮助,也希望大家多多支持。
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