MVC:传递参数以查看? [英] MVC: pass parameter to view?

问题描述

MVC新手问题:

我要获取一个格式为go/{mainnav}/{subnav}的URL，该URL已成功路由到GoController类的方法:

I'm picking up a URL of the form go/{mainnav}/{subnav}, which I've successfully routed to the GoController class, method:

public ActionResult Index(string mainnav, string subnav) {
  return View();
}

到目前为止，太好了.但是现在我希望视图根据mainnav或subnav的值返回不同的HTML.具体来说，我想在一个JavaScript块中加入以下行:

So far, so good. But now I want the view to return different HTML, depending on the values of mainnav or subnav. Specifically, inside a javascript block, I want to include the line:

myobj.mainnav = [value of mainnav parameter];

，并且，仅当subnav不为null或为空时:

myobj.subnav = [value of subnav parameter];

如何将这些参数传递给没有代码隐藏的aspx页面?

How do you pass those parameters to an aspx page that doesn't have a codebehind?

推荐答案

您使用ViewModel类传输数据:

public class IndexViewModel
{
    public string MainNav { get; set; }
    public string SubNav { get; set; }

    public IndexViewModel(string mainnav, string subnav)
    {
        this.MainNav = mainnav;
        this.SubNav = subnav;
    }
}

然后您的操作方法就会出现

Your action method then comes out

public ActionResult Index(string mainnav, string subnav)
{
    return View(new IndexViewModel(mainnav, subnav));
}

这意味着必须对您的视图进行强式输入:

This means your view has to be strongly typed:

<%@ Page Language="C#" Inherits="System.Web.Mvc.ViewPage<YourNameSpace.IndexViewModel>" %>

在您看来，您可以像这样输出数据:

In your view, you output the data like so:

myobj.mainnav = <%: Model.MainNav %>;

如果您使用MVC3，则另一种解决方案是使用动态ViewBag:

An alternative solution if you use MVC3, would be to use the dynamic ViewBag:

public ActionResult Index(string mainnav, string subnav)
{
    ViewBag.MainNav = mainnav;
    ViewBag.SubNav = subnav;
    return View();
}

可以在页面中这样访问:

which would be accessed in the page as so:

myobj.mainnav = <%: ViewBag.MainNav %>;

但是，我建议您阅读不引人入胜的javascript ，看看您是否可以改进您的设计可以避免出现此特定问题.

However, I would recommend that you read up on unobtrusive javascript and see if you can improve your design to avoid this specific problem.

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