来自于：Darren Ji
    本篇体验在控制器方法中使用controllerContext.HttpContext.Request.Files上传多个文件。

    控制器：

    1. using System;
    2. using System.Collections.Generic;
    3. using System.IO;
    4. using System.Linq;
    5. using System.Web;
    6. using System.Web.Mvc;
    7. namespace MvcApplication2.Controllers
    8. {
    9.     public class HomeController : Controller
    10.     {
    11.         public ActionResult Index()
    12.         {
    13.             return View();
    14.         }
    16.         public ActionResult FileUploads()
    17.         {
    18.             string pathForSaving = Server.MapPath("~/Uploads");
    19.             if (this.CreateFolderIfNeeded(pathForSaving))
    20.             {
    21.                 foreach (string file in Request.Files)
    22.                 {
    23.                     HttpPostedFileBase uploadFile = Request.Files[file] as HttpPostedFileBase;
    24.                     if (uploadFile != null && uploadFile.ContentLength > 0)
    25.                     {
    26.                          var path = Path.Combine(pathForSaving, uploadFile.FileName);
    27.                         uploadFile.SaveAs(path);
    28.                     }
    29.                 }
    30.               }
    31.             return RedirectToAction("Index");
    32.         }
    34.         // 检查是否要创建上传文件夹
    35.         private bool CreateFolderIfNeeded(string path)
    36.         {
    37.             bool result = true;
    38.             if (!Directory.Exists(path))
    39.             {
    40.                 try
    41.                 {
    42.                     Directory.CreateDirectory(path);
    43.                 }
    44.                 catch (Exception)
    45.                 {
    46.                     //TODO：处理异常
    47.                     result = false;
    48.                   }
    49.              }
    50.             return result;
    51.         }
    52.     }
    53. }

    Home/Index.cshtml视图：

    1. @{
    2.         ViewBag.Title = "Index";
    3.         Layout = "~/Views/Shared/_Layout.cshtml";
    4. }
    6. @using (Html.BeginForm("FileUploads", "Home", FormMethod.Post, new { enctype = "multipart/form-data" }))
    7. {
    8.         <input type="file" name="files1" id="file1" /><br/>
    9.         <input type="file" name="files2" id="file2" /><br/>
    10.         <input type="file" name="files3" id="file3" /><br/>
    11.         <input type="submit" value="同时上传多个文件" />
    12. }

    注意：name属性值可以不同