在注册页面上,我为vdab学生添加了一个下拉列表:是/否但是视图模型中描述的验证无法正常工作(我想这是因为我使用了ViewBag而不是模型?)
有人可以帮我创建下拉菜单,以便我可以这样使用:
@Html.DropDownFor(x => x.Something, Model.Something, "Select a component type" )
这就是我所拥有的:
IdentityModel
public class ApplicationUser : IdentityUser
{
public virtual Person Person { get; set; }
}
public class Person
{
public virtual Klas Klas { get; set; }
public int Id { get; set; }
public string Voornaam { get; set; }
public string Familienaam { get; set; }
public bool Vdab { get; set; }
}
public class Klas
{
public int Id { get; set; }
public string Omschrijving { get; set; }
}
public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
public ApplicationDbContext()
: base("ConnectionString")
{
}
}
RegisterViewModel:
public class RegisterViewModel
{
[Required]
[Display(Name = "Gebruikersnaam")]
public string UserName { get; set; }
[Required]
[StringLength(100, ErrorMessage = "Het {0} moet misntens {2} Karakters lang zijn.", MinimumLength = 6)]
[DataType(DataType.Password)]
[Display(Name = "Wachtwoord")]
public string Password { get; set; }
[DataType(DataType.Password)]
[Display(Name = "Bevestig Wachtwoord")]
[Compare("Password", ErrorMessage = "De wachtwoorden komen niet overeen")]
public string ConfirmPassword { get; set; }
[Required]
[Display(Name = "Voornaam")]
public string Voornaam { get; set; }
[Required]
[Display(Name = "Familienaam")]
public string Familienaam { get; set; }
[Required]
[Display(Name = "Klas")]
public string Klas { get; set; }
[Required]
[Display(Name = "Vdab Student")]
public bool Vdab { get; set; }
}
在AcountController中:
[AllowAnonymous]
public ActionResult Register()
{
var Vdab = new SelectList(new[] { new { ID = "1", Name = "Ja" }, new { ID = "0", Name = "Nee" }, }, "ID", "Name", 1);
ViewBag.Vdab = Vdab;
return View();
}
最后,我用剃须刀显示视图中的下拉列表
<div class="form-group">
@Html.LabelFor(m => m.Vdab, new { @class = "col-md-2 control-label" })
<div class="col-md-10">
@Html.DropDownList("Vdab", @ViewBag.Vdab as SelectList, "----Maak een keuze ----")
</div>
</div>
答案 0 :(得分:0)
您可以使用:
@Html.DropDownList("Vdab", @ViewBag.Vdab as SelectList, "----Maak een keuze ----")
只需在你的控制器中就可以这样做:
[AllowAnonymous]
public ActionResult Register()
{
List<SelectListItem> myList =new List<SelectListItem>();
myList.Add(new SelectListItem { Value = bool.TrueString, Text = "Ja" });
myList.Add(new SelectListItem { Value = bool.FalseString, Text = "Nee" });
var Vdab = new SelectList(myList,"Value","Text");
ViewBag.Vdab = Vdab;
return View();
}
答案 1 :(得分:-1)
将此添加到RegisterViewModelClass:
public IEnumerable<SelectListItem> VdabSelectList { get; set; }
在控制器中:
[AllowAnonymous]
public ActionResult Register()
{
RegisterViewModel viewModel = new RegisterViewModel();
viewModel.VdabSelectList = new[]
{
new SelectListItem { Value = bool.TrueString, Text = "Ja" },
new SelectListItem { Value = bool.FalseString, Text = "Nee" }
}
return View(viewModel);
}
[HttpPost]
public ActionResult Register(RegisterViewModel _viewModel)
{
//Do stuff with form data...
}
最后,将其添加到您的视图中:
<div class="form-group">
@Html.LabelFor(m => m.Vdab, new { @class = "col-md-2 control-label" })
<div class="col-md-10">
@Html.DropDownListFor(m => m.vDab, new SelectList(m.VdabSelectList, "Value", "Text"))
</div>
</div>
免责声明:我没有尝试使用布尔值的DropDownListFor,但基于this post,它看起来应该可以工作。我总是使用单选按钮来表示布尔值,如下所示:
@Html.RadioButtonFor(m => m.Vdab, true)Ja
@Html.RadioButtonFor(m => m.Vdab, false)Nee
答案 2 :(得分:-1)
您的问题很简单,您已指定您的模型类型为bool。 Bool是一个值类型,并且总是包含一个值,因此验证永远不会失败,无论如何。它始终至少包含默认值,即false。
您希望将类型设为可为空。
[Required]
[Display(Name = "Vdab Student")]
public bool? Vdab { get; set; }
现在,您所需的验证将正常工作,您的原始(和正确的)Html帮助程序将起作用。
@Html.DropDownFor(x => x.Something, Model.SomethingList, "Select a component type" )
警告词虽然..将您的列表更改为Model.SomethigList,使用您所选项目和列表的相同名称可能会导致很多问题。