我想使用 mvc5 以附件形式上传文件

Question

我必须使用上传文件 function 创建表单。 我使用 .NET 框架 asp.net mvc5 和 C# 作为语言。 但我找不到表格的教程。 我尽力了，我真的需要你们的帮助。 我将在此处添加我的 model、视图和 controller。

我想知道如何创建上传文件 function。 我尝试了很多，但我找不到方法。 我真的需要帮助

Model

using System.Collections.Generic;

namespace PMSWebApplication.Models.DomainModels
{
    public class Attachment
    {
        public Attachment()
        {
            BugFixes = new HashSet<BugFix>();
            Updates = new HashSet<Update>();
        }
        public int Id { get; set; }
        public int ProjectId { get; set; }
        public Project Project { get; set; }
        public string UserId { get; set; }
        public ApplicationUser User { get; set; }
        public string FileName { get; set; }
        public string UploadFile { get; set; }
        //public string Type { get; set; }
        public string Description { get; set; }

        public virtual ICollection<BugFix> BugFixes { get; set; }
        public virtual ICollection<Update> Updates { get; set; }


    }
}

Controller

using System.Data.Entity;
using System.Threading.Tasks;
using System.Net;
using System.Web.Mvc;
using PMSWebApplication.Models;
using PMSWebApplication.Models.DomainModels;
using Microsoft.AspNet.Identity.EntityFramework;
using Microsoft.AspNet.Identity;

namespace PMSWebApplication.Controllers
{
    public class AttachmentsController : Controller
    {
        private ApplicationDbContext db = new ApplicationDbContext();

        // GET: Attachments
        public async Task<ActionResult> Index(/*HttpPostedFileBase file*/)
        {
           
            var attachments = db.Attachments.Include(a => a.Project).Include(a => a.User);
            return View(await attachments.ToListAsync());
        }


        // GET: Attachments/Details/5
        public async Task<ActionResult> Details(int? id)
        {
            if (id == null)
            {
                return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
            }
            Attachment attachment = await db.Attachments.FindAsync(id);
            if (attachment == null)
            {
                return HttpNotFound();
            }
            return View(attachment);
        }

        // GET: Attachments/Create
        public ActionResult Create()
        {

            var users = new UserManager<ApplicationUser>(new UserStore<ApplicationUser>(db)).Users;

            ViewBag.ProjectId = new SelectList(db.Projects, "Id", "ProjectName");
            ViewBag.UserId = new SelectList(users, "Id", "Email");
            return View();
        }

        // POST: Attachments/Create
        // To protect from overposting attacks, please enable the specific properties you want to bind to, for 
        // more details see http://go.microsoft.com/fwlink/?LinkId=317598.
        [HttpPost]
        [ValidateAntiForgeryToken]
        public async Task<ActionResult> Create([Bind(Include = "Id,ProjectId,UserId,FileName,UploadFile,Type,Description")] Attachment attachment)
        {
            if (ModelState.IsValid)
            {
                db.Attachments.Add(attachment);
                await db.SaveChangesAsync();
                return RedirectToAction("Index");
            }
            var users = new UserManager<ApplicationUser>(new UserStore<ApplicationUser>(db)).Users;

            ViewBag.ProjectId = new SelectList(db.Projects, "Id", "ProjectName", attachment.ProjectId);
            ViewBag.UserId = new SelectList(users, "Id", "Email", attachment.UserId);
            return View(attachment);
        }

        protected override void Dispose(bool disposing)
        {
            if (disposing)
            {
                db.Dispose();
            }
            base.Dispose(disposing);
        }
    }
}

查看索引

@model IEnumerable<PMSWebApplication.Models.DomainModels.Attachment>

@{
    ViewBag.Title = "Index";
    Layout = "~/Views/Shared/_Layout.cshtml";
}

<h2>Attachments</h2>

@*@using (Html.BeginForm("Upload", "Upload", FormMethod.Post,new { enctype="multipart/form-data"}))
{
    <input type="file" name="file" />
    <br/>*@
    @*<input type="submit" value="Upload" class="btn btn-primary" />*@

@*}*@

<p>
    @Html.ActionLink("Create New Attachment", "Create", null, new { @class = "btn btn-info" })
</p>

<table class="table">
    <tr>
        <th>
            @Html.DisplayNameFor(model => model.Project.ProjectName)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.User.UserLevel)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.FileName)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.FileType)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.Type)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.Description)
        </th>
        <th></th>
    </tr>

@foreach (var item in Model) {
    <tr>
        <td>
            @Html.DisplayFor(modelItem => item.Project.ProjectName)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.User.UserLevel)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.FileName)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.FileType)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.Type)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.Description)
        </td>
        <td>
            @Html.ActionLink("Edit", "Edit", new { id = item.Id }, new { @class = "btn btn-primary btn-sm" }) |
            @Html.ActionLink("Details", "Details", new { id = item.Id }, new { @class = "btn btn-info btn-sm" }) |
            @Html.ActionLink("Delete", "Delete", new { id = item.Id }, new { @class = "btn btn-warning btn-sm" })
        </td>
    </tr>
}

</table>

查看-创建

@model PMSWebApplication.Models.DomainModels.Attachment

@{
    ViewBag.Title = "Create";
    Layout = "~/Views/Shared/_Layout.cshtml";
}

<h2>Create</h2>


@using (Html.BeginForm()) 
{
    @Html.AntiForgeryToken()
    

    <div class="form-horizontal">
        <h4>Attachment</h4>
        <hr />
        @Html.ValidationSummary(true, "", new { @class = "text-danger" })
        <div class="form-group">
            @Html.LabelFor(model => model.ProjectId, "ProjectId", htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.DropDownList("ProjectId", null, htmlAttributes: new { @class = "form-control" })
                @Html.ValidationMessageFor(model => model.ProjectId, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.UserId, "UserId", htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.DropDownList("UserId", null, htmlAttributes: new { @class = "form-control" })
                @Html.ValidationMessageFor(model => model.UserId, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.FileName, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.FileName, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.FileName, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.FileType, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.FileType, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.FileType, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.Type, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.Type, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Type, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.Description, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.Description, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Description, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            <div class="col-md-offset-2 col-md-10">
                <input type="submit" value="Create" class="btn btn-default" />
            </div>
        </div>
    </div>
}

<div>
    @Html.ActionLink("Back to List", "Index")
</div>

@section Scripts {
    @Scripts.Render("~/bundles/jqueryval")
}

Answer 1

以下是来自工作站点的相关片段：

// cshtml
<input type="file" name="ReportFile" />

// viewmodel
public class RequestViewModel
{
   public HttpPostedFileBase ReportFile { get; set; }
}

// controller method
public virtual ActionResult Upload(RequestViewModel req)
{
   var fileName = Path.GetFileName(req.ReportFile.FileName);

   using (var rdr = new BinaryReader(req.ReportFile.InputStream))
   {
      var content = rdr.ReadBytes(req.ReportFile.ContentLength);
   }
}