如何将数据表绑定到ASP.net MVC中的下拉列表？

Question

I am very new to ASP.net MVC . I want to bind a dropdown with a datatable while the page is loading intitaally. In webforms, i used to do like:

dropdownname.datasource=dt;
dropdownname.textfield="name";
dropdownname.valuefield="id";

name and id are the column names in data table. I am using aspx view engine. Please help on this,

Answer 1

你在寻找类似这样 ？

Answer 2

In MVC you can use the HtmlHelper DropDownListFor .

Suppose you havea view model like this:

public class UserModel
{
    public string Name { get; set; }

    // Some other properties..

    public int CountryId { get; set; }

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

You can generate a dropdownlist with the helper:

@Html.DropDownListFor(m => m.CountryId, Model.Countries)

You will have to populate the country list in your controller:

public ActionResult Edit(int userId)
{
    var model = new UserModel();
    // get data from db.

    // Populate countries list.
    model.Countries = db.Countries.Select(c => new SelectListItem
                                                   {
                                                        Value = c.Id,
                                                        Text = c.Name
                                                   }).ToList();
}

If you'd wrap this dropdownlist in a form, it will post the selected country id to the controller.

There are tons of other example around on the internet. Try this one for example. Also, Google is your best friend.