Pass SelectedValue of DropDownList in Html.BeginForm() in ASP.NEt MVC 3

asp.net-mvc, asp.net-mvc-3, html-helper, html.beginform, razor

Solution

The selected value will be passed when the form is submitted because the dropdown list is represented by a `<select>` element. You just need to adapt your view model so that it has a property called `SelectedId` for example to which you will bind the dropdown:

@using(Html.BeginForm() )
{
    <fieldset>
        <dl>
            <dt>
                @Html.LabelFor(x => x.SelectedId)
            </dt>
           <dd>
                @Html.DropDownListFor(x => x.SelectedId, Model.CategoryList)
           </dd>
        </dl>
    </fieldset>

    <input type="submit" value="Search" />
}

This assumes the following view model:

public class MyViewModel
{
    [DisplayName("Select a category")]
    public int SelectedId { get; set; }

    public IEnumerable<SelectListItem> CategoryList { get; set; }
}

that will be handled by your controller:

public ActionResult Index()
{
    var model = new MyViewModel();
    // TODO: this list probably comes from a repository or something
    model.CategoryList = new[]
    {
        new SelectListItem { Value = "1", Text = "category 1" },
        new SelectListItem { Value = "2", Text = "category 2" },
        new SelectListItem { Value = "3", Text = "category 3" },
    };
    return View(model);
}

[HttpPost]
public ActionResult Index(MyViewModel model)
{
    // here you will get the selected category id in model.SelectedId
    return Content("Thanks for selecting category id: " + model.SelectedId);
}

Problem

This is my View Code: ``` @using(Html.BeginForm(new { SelectedId = /*SelectedValue of DropDown*/ })) { <fieldset> <dl> <dt> @Html.Label(Model.Category) </dt> <dd> @Html.DropDownListFor(model => Model.Category, CategoryList) </dd> </dl> </fieldset> <input type="submit" value="Search" /> } ``` As code shown I need to pass the `dropdown` selected value to the action in `BeginForm()` Html helper. What is your suggestion?

Original source