如何在ASP.Net MVC4 Razor中选择查询字符串

Question

I have a URL like that

http://localhost:1243/home/index/?skip_api_login=1&api_key=145044622175352&signed_next=1

Now home is my controller index is my action.

But please tell me how I can pick value of skip_api_login , api_key , signed_next in asp.net MVC4 razor .

I want to use those values in controller and views. Please tell me how to pick them.

Answer 1

You could have your controller action take them as parameters and the model binder will set their values form the query string:

public ActionResult Index(string skip_api_login , string api_key, int signed_next)
{
    ...
}

or event better, write a view model:

public class MyViewModel
{
    public string Skip_api_login { get; set; }
    public string Api_key { get; set; }
    public int Signed_next { get; set; }
}

that your Index action will take as parameter:

public ActionResult Index(MyViewModel model)
{
    ...
    return View(model);
}

and then your view could be strongly typed to this view model and you will be able to access those values:

@model MyViewModel
...
@Html.DisplayFor(x => x.Skip_api_login)
@Html.DisplayFor(x => x.Api_key)
@Html.DisplayFor(x => x.Signed_next)

Of course you could always access query string parameters from the Request object:

@Request["skip_api_login"]

But you probably don't want to be doing such things in your view. Remember that a view is supposed to work only with the values that the controller action has provided it under the form of a view model. A view is not supposed to be fetching values from request, sessions, viewdatas, viewbags, databases, and whatever comes to your mind. A view in ASP.NET MVC has a single responsibility: use the information from the view model.