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本篇內(nèi)容介紹了“怎么使用ASP.NET MVC實(shí)現(xiàn)文件下載”的有關(guān)知識(shí),在實(shí)際案例的操作過程中,不少人都會(huì)遇到這樣的困境,接下來(lái)就讓小編帶領(lǐng)大家學(xué)習(xí)一下如何處理這些情況吧!希望大家仔細(xì)閱讀,能夠?qū)W有所成!
點(diǎn)擊一個(gè)鏈接,把該文件的Id傳遞給控制器方法,遍歷文件夾所有文件,根據(jù)ID找到對(duì)應(yīng)文件,并返回FileResult類型。
namespace MvcApplication1.Models { public class FileForDownload { public int Id { get; set; } public string Name { get; set; } public string Path { get; set; } } }
寫一個(gè)針對(duì)文件的幫助類,遍歷指定文件夾的所有文件,返回FileForDownload集合類型。在項(xiàng)目根目錄下創(chuàng)建Files文件夾,存放下載文件。
using System.Collections.Generic; using System.IO; using System.Web.Hosting; using MvcApplication1.Models; namespace MvcApplication1.Helper { public class FileHelper { public List<FileForDownload> GetFiles() { List<FileForDownload> result = new List<FileForDownload>(); 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; } } }
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"); } } }
@model IEnumerable<MvcApplication1.Models.FileForDownload> @{ ViewBag.Title = "Index"; Layout = "~/Views/Shared/_Layout.cshtml"; } <table> @foreach (var item in Model) { <tr> <td> @Html.DisplayFor(modelItem => item.Id) </td> <td> @Html.DisplayFor(modelItem => item.Name) </td> <td> @Html.ActionLink("下載", "DownloadFile", new { id = item.Id }) </td> </tr> } </table>
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