我试着更准确地回答我之前可以在这里找到的问题，我得到了一些不错的答案，但在我的情况下无法弄清楚如何使用它Previous question 我得到了一些不错的答案，但无法弄清楚如何在我的情况下使用它。
基本上我想拥有包含
的注册页面Email //来自我的AspNetUser（datamodel）类，数据库中也存在AspNetUsers表。UserName //来自我的AspNetUser（datamodel）类，数据库中也存在AspNetUsers表。Password //来自我的AspNetUser（datamodel）类，数据库中也存在AspNetUsers表。Role // dropdownlist，来自Role（datamodel）类，数据库中也存在Roles表在我的控制器中，我以下列方式强化了我的Register方法：
public class AccountController : Controller
{
//private readonly IDbContext dbContext;
//
// GET: /Account/
[HttpGet]
public ActionResult Login()
{
return View();
}
[HttpPost]
[AllowAnonymous]
public ActionResult Login(LoginModel model)
{
if(Membership.ValidateUser(model.UserName, model.Password))
{
FormsAuthentication.SetAuthCookie(model.UserName, model.RememberMe);
return RedirectToAction("Index", "Home");
}
ModelState.AddModelError("", "The user name or password provided is incorrect.");
return View(model);
}
[HttpGet]
public ActionResult Register()
{
string [] roles = Roles.GetAllRoles();
return View(roles);
}
[HttpPost]
public ActionResult Register(AspNetUser model)
{
return View();
}
}
在我的get方法中，我正在传递roles进行查看，现在我正在使用AspNetUser作为模型在视图中
@model Sorama.CustomAuthentiaction.Models.AspNetUser
@{
ViewBag.Title = "Register";
Layout = "~/Views/shared/_BootstrapLayout.empty.cshtml";
}
@section Styles{
<link href="@Url.Content("~/Content/bootstrap.css")" rel="stylesheet" type="text/css" />
}
<div class ="form-signin">
@using (Html.BeginForm("Login", "Account"))
{
@Html.ValidationSummary(true)
<h2 class="form-signin-heading"> Register </h2>
<div class ="input-block-level">@Html.TextBoxFor(model=>model.Email, new{@placeholder = "Email"})</div>
<div class ="input-block-level">@Html.TextBoxFor(model=>model.UserName, new{@placeholder = "UserName"})</div>
<div class ="input-block-level">@Html.PasswordFor(model=>model.Password, new{@placeholder ="Password"})</div>
<div class ="input-block-level">@Html.DropdownlistFor(.....//don't no how to generate dropdownlist)
<button class="btn btn-large btn-primary" type="submit">Sign In</button>
}
</div>
你可以告诉我如何获得dropdownlist以及如何将所选值传递给控制器以使用它以便我可以在注册期间将用户置于角色中？为注册创建新模型会更好吗？
编辑：AspNetUser模型
public class AspNetUser
{
private ICollection<Role> _roles= new Collection<Role>();
public Guid Id { get; set; }
[Required]
public virtual String Username { get; set; }
public virtual String Email { get; set; }
[Required, DataType(DataType.Password)]
public virtual String Password { get; set; }
public virtual String FirstName { get; set; }
public virtual String LastName { get; set; }
[DataType(DataType.MultilineText)]
public virtual String Comment { get; set; }
public virtual Boolean IsApproved { get; set; }
public virtual int PasswordFailuresSinceLastSuccess { get; set; }
public virtual DateTime? LastPasswordFailureDate { get; set; }
public virtual DateTime? LastActivityDate { get; set; }
public virtual DateTime? LastLockoutDate { get; set; }
public virtual DateTime? LastLoginDate { get; set; }
public virtual String ConfirmationToken { get; set; }
public virtual DateTime? CreateDate { get; set; }
public virtual Boolean IsLockedOut { get; set; }
public virtual DateTime? LastPasswordChangedDate { get; set; }
public virtual String PasswordVerificationToken { get; set; }
public virtual DateTime? PasswordVerificationTokenExpirationDate { get; set; }
public virtual ICollection<Role> Roles
{
get { return _roles; }
set { _roles = value; }
}
}
答案 0 :(得分：2)
您最好拥有专为此视图设计的视图模型。想一想您在视图中需要哪些信息并定义您的视图模型：
public class RegisterViewModel
{
public string Email { get; set; }
public string UserName { get; set; }
public string Password { get; set; }
public string SelectedRole { get; set; }
public IEnumerable<SelectListItem> Roles { get; set; }
}
从这个视图模型中可以看出，为了有一个下拉列表，你需要2个属性：一个标量属性将保存所选值，一个集合属性保存可用值列表。
然后：
public ActionResult Register()
{
string [] roles = Roles.GetAllRoles();
var model = new RegisterViewModel();
model.Roles = roles.Select(r => new SelectListItem
{
Value = r,
Text = r,
});
return View(model);
}
[HttpPost]
public ActionResult Register(RegisterViewModel model)
{
// the model.SelectedRole will contain the selected value from the dropdown
// here you could perform the necessary operations in order to create your user
// based on the information stored in the view model that is passed
// NOTE: the model.Roles property will always be null because in HTML,
// a <select> element is only sending the selected value and not the entire list.
// So if you intend to redisplay the same view here instead of redirecting
// makes sure you populate this Roles collection property the same way we did
// in the GET action
return Content("Thanks for registering");
}
最后是相应的观点：
@model RegisterViewModel
@{
ViewBag.Title = "Register";
Layout = "~/Views/shared/_BootstrapLayout.empty.cshtml";
}
@section Styles{
<link href="@Url.Content("~/Content/bootstrap.css")" rel="stylesheet" type="text/css" />
}
<div class ="form-signin">
@using (Html.BeginForm("Login", "Account"))
{
@Html.ValidationSummary(true)
<h2 class="form-signin-heading"> Register </h2>
<div class ="input-block-level">
@Html.TextBoxFor(model => model.Email, new { placeholder = "Email" })
</div>
<div class ="input-block-level">
@Html.TextBoxFor(model => model.UserName, new { placeholder = "UserName" })
</div>
<div class ="input-block-level">
@Html.PasswordFor(model => model.Password, new { placeholder = "Password" })
</div>
<div class ="input-block-level">
@Html.DropdownlistFor(model => model.SelectedRole, Model.Roles)
</div>
<button class="btn btn-large btn-primary" type="submit">Sign In</button>
}
</div>