javascript - 如何在 ASP.NET MVC 中为单选按钮列表分配默认值？

Question

如何在 JavaScript 中获取 .Net MVC 模型值？

我正在从数据库中存储的列表填充单选按钮控件。item.MyColumn 具有单选按钮选项列表，例如"is"、“否”、“不适用”等。

在 jQuery 中，我需要获取 Yes(或)No(或)NA 的值，并根据该值，我必须进行一些验证。

<div class="col-sm-8 checkbox-inline text-left">
    @foreach (var item in Model.YesNoNAList)
    {
        @Html.RadioButtonFor(model => model.ReceivingMedication, item.ID, new { @id = "ReceivingMedication" + item.MyColumn }) @:  @item.MyColumn
    }
    <span asp-validation-for="ReceivingMedication" class="text-danger"></span>
</div>

在 JavaScript 中使用此语法，会给出列: id 。而不是与 Id 关联的值。

   var selValue = $('input[name=ReceivingMedication]:checked').val();

Answer 1

通常，您不需要操作控件的 ID。如果您想分配默认值，请将其分配给ReceivingMemination。

<div class="col-sm-8 checkbox-inline text-left">
    @foreach (var item in Model.YesNoNAList)
    {
        <p>@Html.RadioButtonFor(model => model.ReceivingMedication, item.Value) @item.Text</p>
    }
    <span asp-validation-for="ReceivingMedication" class="text-danger"></span>
</div>

<script>
    var selValue = $('input[name=ReceivingMedication]:checked').val();
    console.log(selValue);
</script>

型号

public class Model
{
    public List<SelectListItem> YesNoNAList { get; set; }
    public string ReceivingMedication { get; set; }
    public string ID { get; set; }
}

Controller

public class HomeController : Controller
{
    public ActionResult Index()
    {
        var model = new Model
        {
            YesNoNAList = new List<SelectListItem>
            {
                new SelectListItem {Text = "Yes", Value = "1"},
                new SelectListItem {Text = "No", Value = "0"},
                new SelectListItem {Text = "N/A", Value = ""}
            },
            ReceivingMedication = "0" // Default value
        };
        return View(model);
    }
}