taking id and value from a lot of radiobutton by p

问题:

In the view I have a lot of RadioButtons and the id is the unique for each one. when user choose one of those in controller I would like to take the ID and VALUE how i can do that.... i try with formCollection but in here i just can take value...

@Html.RadioButton("BookType", "1", new { id = "100" })
<br>
Above code generates Below code
<br/>
< input id="100" name="BookType" type="radio" value="1" >

and the question is how can I take the ID and VALUE by 'POST' Action in the control.

回答1:

You can write code in Post Action as follow:

var radbtn = Request.From["100"];

回答2:

You don't, that's not how form controls work.

When you submit a form, the name and value are submitted, except for scenarios like checkbox and radio inputs.

Only when a checkbox is checked, or a radio input is checked are the name/value posted.

You need to re-think what you're trying to achieve. If you can give some more information what you want to achieve I'm sure I or anyone else can help further.

回答3:

I suggest you to use view model. Please see this example bellow:

namespace MvcApplication1.Controllers {

    public class TheOption {
        public string Id { get; set; }
        public string Value { get; set; }
        public bool? Checked { get; set; }
    }

    public class FooController : Controller {
        //
        // GET: /Foo/

        public ActionResult Index() {
            var options = new List<TheOption> {
                new TheOption {Id = "One", Value = "The One"},
                new TheOption {Id = "Two", Value = "The Two"},
                new TheOption {Id = "Hundred", Value = "The Hundred"},
            };
            return View(options);
        }

        [HttpPost]
        public ActionResult Index(List<TheOption> options) {
            return View(options);
        }

    }
}

Now you need to create editor template for TheOption model. It's simply by create folder named EditorTemplates under ~\Views\Shared\ folder. Add new view as the editor template. Name this editor template to match with the model name (TheOption).

Here's the content of ~\Views\Shared\EditorTemplates\TheOption.cshtml:

@model MvcApplication1.Controllers.TheOption
<div>
    @Html.RadioButtonFor(m => m.Checked, true, new { id = Model.Id + "_selected" })
    @Html.RadioButtonFor(m => m.Checked, false, new { id = Model.Id }) @Model.Value

    @Html.HiddenFor(m => m.Id)
    @Html.HiddenFor(m => m.Value)
</div>

Now go to your main view (Index.cshtml) and simply put this code:

@model System.Collections.Generic.List<MvcApplication1.Controllers.TheOption>
@using (Html.BeginForm()) {
    @Html.EditorFor(m=>m)    
    <button type="submit">Save</button>
}

Done! Hope this helps :)