在剃刀视图 MVC 中从数据库中设置选定的下拉值

Question

我在 razor mvc 视图中明确创建了一个下拉列表。我希望默认选项是其中一项，该项的值应该来自数据库

查看代码

<div class="form-group">
  @Html.LabelFor(model => model[i].Customer.HomeType, htmlAttributes: new { @class = "control-label col-md-2" })
    <div class="SerivcesRegistrationInput col-md-10">
      @Html.DropDownListFor(model => model[i].Customer.HomeType, new List<SelectListItem>
 {
     new SelectListItem{ Text="House", Value = "House",@(Model[i].CustomerServices.HomeType == "House" ? Selected = true : false)  },
     new SelectListItem{ Text="Apartment", Value = "Apartment" },
     new SelectListItem{ Text="Farm", Value = "Farm" } },
      "Select your home type", htmlAttributes: new { @class = "form-control" })
 }         
    </div>
</div>

控制器代码

 cs.HomeType = serviceDetails.HomeType;
 sp.CustomerServices = cs;
 return View("EditCustomerServices", ProviderList);

模型有我需要的数据，但如何将其设置为正确的下拉列表值。我尝试使用简写 if 但它给了我一个错误

Invalid member initializer

我可以为 Selected Boolean 添加 if 条件吗？

Answer 1

@{
    var selected = Model.CustomerServices.HomeType == "House";
}

<div class="form-group">
  @Html.LabelFor(model => model.Customer.HomeType, htmlAttributes: new { @class = "control-label col-md-2" })
    <div class="SerivcesRegistrationInput col-md-10">
      @Html.DropDownListFor(model => model.Customer.HomeType, new List<SelectListItem>
 {
     new SelectListItem{ Text="House", Value = "House", Selected = selected },
     new SelectListItem{ Text="Apartment", Value = "Apartment" },
     new SelectListItem{ Text="Farm", Value = "Farm" } },
      "Select your home type", htmlAttributes: new { @class = "form-control" })
 }         
    </div>
</div>