从ASP.NET项目使用网页下载文件

Question

I am follow this articles in order to build simple web site. i have database with an objects, each object represent file on dist and several properties (size, name etc...) and i have several questions:

1. After add the controller like in this article (min 1:45) after run my application it navigate not the my home page but into this index page and only after press Home button i can see my home page - how to fix it ?

2. in this example each person have several actions: delete, update, details... I only want to have the option Download to download this file into my system (all the files location is in network folder with access) - how can i do that ?

Index.schtml:

@{
    ViewBag.Title = "Home Page";  
}


<div class="hero-unit">
    <h1>Automation Captures <image>
                                <img src="~/img/wireshark_logo.png" /></image></h1>
    <p class="lead">Automation captures made by running robors.</p>
    <p><a href="http://asp.net" class="btn btn-primary btn-large">Learn more &raquo;</a></p>
</div>
<div class="row">
    <div class="span4">
        <h2>button1</h2>
        <p>ASP.NET MVC gives you a powerful, patterns-based way to build dynamic websites that
        enables a clean separation of concerns and gives you full control over markup
        for enjoyable, agile development.</p>
        <p><a href="/WebMail " class="btn btn-primary btn-large">Click here &raquo;</a></p>
    </div>
    <div class="span4">
        <h2>button2</h2>
        <p>NuGet is a free Visual Studio extension that makes it easy to add, remove, and update libraries and tools in Visual Studio projects.</p>
        <p><a href="http://asp.net" class="btn btn-primary btn-large">Click here &raquo;</a></p>
    </div>
    <div class="span4">
        <h2>button3</h2>
        <p>You can easily find a web hosting company that offers the right mix of features and price for your applications.</p>
        <p><a href="http://asp.net" class="btn btn-primary btn-large">Click here &raquo;</a></p>
    </div>
</div>
<div class="row">
    <div class="span4">
        <h2>button4</h2>
        <p>
            ASP.NET MVC gives you a powerful, patterns-based way to build dynamic websites that
            enables a clean separation of concerns and gives you full control over markup
            for enjoyable, agile development.
        </p>
        <p><a href="http://asp.net" class="btn btn-primary btn-large">Click here &raquo;</a></p>
    </div>
    <div class="span4">
        <h2>button5</h2>
        <p>NuGet is a free Visual Studio extension that makes it easy to add, remove, and update libraries and tools in Visual Studio projects.</p>
        <p><a href="http://asp.net" class="btn btn-primary btn-large">Click here &raquo;</a></p>
    </div>
    <div class="span4">
        <h2>button6</h2>
        <p>You can easily find a web hosting company that offers the right mix of features and price for your applications.</p>
        <p><a href="http://asp.net" class="btn btn-primary btn-large">Click here &raquo;</a></p>
    </div>
</div>

Home controller

public class NewController : Controller
{
    private MyObjectDBContext db = new MyObjectDBContext();

    // GET: /WebMail/
    public ActionResult Index()
    {
        return View(db.MyObjects.ToList());
    }

    // GET: /WebMail/Details/5
    public ActionResult Details(int? id)
    {
        if (id == null)
        {
            return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
        }
        MyObject MyObject = db.MyObjects.Find(id);
        if (MyObject == null)
        {
            return HttpNotFound();
        }
        return View(MyObject);
    }

    // GET: /WebMail/Create
    public ActionResult Create()
    {
        return View();
    }

My new controller

public class NewController : Controller
{
    private MyObjectDBContext db = new MyObjectDBContext();

    // GET: /MyObject/
    public ActionResult Index()
    {
        return View(db.MyObjects.ToList());
    }

    // GET: /MyObject/Details/5
    public ActionResult Details(int? id)
    {
        if (id == null)
        {
            return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
        }
        MyObject MyObject = db.MyObjects.Find(id);
        if (MyObject == null)
        {
            return HttpNotFound();
        }
        return View(MyObject);
    }

    // GET: /MyObject/Create
    public ActionResult Create()
    {
        return View();
    }

    // POST: /MyObject/Create
    // To protect from over posting attacks, please enable the specific properties you want to bind to, for 
    // more details see http://go.microsoft.com/fwlink/?LinkId=317598.
    // 
    // Example: public ActionResult Update([Bind(Include="ExampleProperty1,ExampleProperty2")] Model model)
    [HttpPost]
    [ValidateAntiForgeryToken]
    public ActionResult Create(MyObject MyObject)
    {
        if (ModelState.IsValid)
        {
            db.MyObjects.Add(MyObject);
            db.SaveChanges();
            return RedirectToAction("Index");
        }

        return View(MyObject);
    }

    // GET: /MyObject/Edit/5
    public ActionResult Edit(int? id)
    {
        if (id == null)
        {
            return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
        }
        MyObject MyObject = db.MyObjects.Find(id);
        if (MyObject == null)
        {
            return HttpNotFound();
        }
        return View(MyObject);
    }

    // POST: /MyObject/Edit/5
    // To protect from over posting attacks, please enable the specific properties you want to bind to, for 
    // more details see http://go.microsoft.com/fwlink/?LinkId=317598.
    // 
    // Example: public ActionResult Update([Bind(Include="ExampleProperty1,ExampleProperty2")] Model model)
    [HttpPost]
    [ValidateAntiForgeryToken]
    public ActionResult Edit(MyObject MyObject)
    {
        if (ModelState.IsValid)
        {
            db.Entry(MyObject).State = EntityState.Modified;
            db.SaveChanges();
            return RedirectToAction("Index");
        }
        return View(MyObject);
    }

    // GET: /MyObject/Delete/5
    public ActionResult Delete(int? id)
    {
        if (id == null)
        {
            return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
        }
        MyObject MyObject = db.MyObjects.Find(id);
        if (MyObject == null)
        {
            return HttpNotFound();
        }
        return View(MyObject);
    }

    // POST: /MyObject/Delete/5
    [HttpPost, ActionName("Delete")]
    [ValidateAntiForgeryToken]
    public ActionResult DeleteConfirmed(int id)
    {
        MyObject MyObject = db.MyObjects.Find(id);
        db.MyObjects.Remove(MyObject);
        db.SaveChanges();
        return RedirectToAction("Index");
    }

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

Global.ASPX

public class MvcApplication : System.Web.HttpApplication
{
    private CaptureDBContext db = new CaptureDBContext();
    protected void Application_Start()
    {
        AreaRegistration.RegisterAllAreas();
        FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
        RouteConfig.RegisterRoutes(RouteTable.Routes);
        BundleConfig.RegisterBundles(BundleTable.Bundles);
    }
}

Answer 1

As you have written your code in new controller and use it to show default home page of the site,you need to change route in global.asax or in RouteConfig file(whereever you are registering your routes) with this,

    routes.MapRoute(
                    name: "Default",
                    url: "{controller}/{action}/{id}",
                    defaults: new { controller = "New", action = "Index", 
                                   id = UrlParameter.Optional }
                );

for downloading a file you'll require a controller action to return FileResult

public FileResult Download()
{
    byte[] fileBytes =/*fetch your file here and read it*/;
    string fileName = "example";
    return File(fileBytes, System.Net.Mime.MediaTypeNames.Application.Octet,
                  fileName);
}