使用Request.Querystring替代Response.Redirect

Question

I've made a mvc4 project in Visual Studio Express 2012 for web . And there I've made a search function. And a view to show the result.

So normally I would have added this to the _Layout.cshtml .

if (Request["btn"] == "Search")
{
    searchValue = Request["searchField"];

    if (searchValue.Length > 0)
    {
        Response.Redirect("~/Views/Search/Result.cshtml?searchCriteria=" + searchValue);
    }
}

And that doesn't work. What whould be the alternative to Response.Redirect in mvc4 , which still allows me to keep the searchCriteria to be read with Request.Querystring at the Result.cshtml page.

Answer 1

You should be definetly doing this in your controller, making it return an ActionResult and returning a RedirectResult, ie:

public ActionResult Search(string searchCriteria) {
    return Redirect("~/Views/Search/Result.cshtml?searchCriteria="+searchCriteria);
}

Btw, I'd also say don't use neither of the Request stuff (or even Redirects), but actions with parameters that MVC will bind automagically from POST or GET parameters. Eg, "www.something.com/search?searchCriteria=hello" will automatically bind the searchCriteria parameter to the Action handling /search. Or, "www.something.com/search/hello" will bind to the parameter defined into your Routing config.

Answer 2

A simple example would be something like this:

Index.cshtml:

@using (Html.BeginForm("Results", "Search", FormMethod.Get))
{
    @Html.TextBox("searchCriteria")
    <input type="submit" value='Search' />
}

Then the controller:

public class SearchController : Controller
{
    public ActionResult Index()
    {
        return View();
    }

    public ActionResult Results(string searchCriteria)
    {
        var model = // ... filter using searchCriteria

        return View(model);
    }
}

model could be of type ResultsViewModel , which would encase everything you need to display the results. This way, your search is setup in a RESTful way - meaning it behaves consistently each time.