ASP.NET MVC實現文件下載
思路
點擊一個鏈接,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ID找到對應文件,並返回FileResult類型。
與文件相關的Model:
namespace MvcApplication1.Models { public class FileForDownload { public int Id { get; set; } public string Name { get; set; } public string Path { get; set; } } }
文件幫助類
寫一個針對文件的幫助類,遍歷指定文件夾的所有文件,返回FileForDownload集合類型。在項目根目錄下創建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; } } }
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<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>
到此這篇關於ASP.NET MVC實現文件下載的文章就介紹到這瞭。希望對大傢的學習有所幫助,也希望大傢多多支持WalkonNet。
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