Question

我试图这样做:

public ActionResult Index(List<Client> Client)
{
    if (Client != null)
        return View(Client);

    return View(db.Client.ToList());
}

[HttpPost]
public ActionResult Search(string cnpj)
{
    List<Client> Client = db.Client // here it finds one client
        .Where(c => cnpj.Equals(c.Cnpj))
        .ToList();

    return RedirectToAction("Index", Client);
}

在搜查行动之后,该指数就属于指数,但客户参数总是无效。

有些人知道为什么?

我这样做并努力:

public ActionResult Index(string cnpj)
{
    if (!string.IsNullOrEmpty(cnpj))
    {
        List<Client> clients = db.Client
        .Where(c => cnpj.Equals(c.Cnpj))
        .ToList();

        return View(clients);
    }

    return View(db.Client.ToList());
}

Answer 1

Hi you should create a custom ModelBinder to pass custom types, as showed by this question: ASP.NET MVC controller actions with custom parameter conversion?

He then recommends a really good blog post: ASP.NET MVC controller actions with custom parameter conversion?

希望这一帮助

Answer 2

y cant to simply call the function instead of redirecting? call this from the Search Action

Index(Client)

what happens in redirect is that a HTTP Code of 302 is sent to the browser with the redirect URL then browser sends a new request to the server and therefore the Client is null because the browser cant send it back. EDIT : -
after reading the comments in this case u have two options
1.one is to make another Index action and change the parameter type to string so now ull be able to call that directly
2.Use TempData(). which is a special store provided by the MVC which can store an object for some time and it looses its value when it is accessed for the first time.
simply add the client list to temp data TempData.Add("Client",Client) and then use it in action Index as TempData["Client"]

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