Question

我有一个RegisterViewModel，它接收用户的输入并将其存储在数据库中。我已经使用IEnumerable在dropdownlist中存储角色。视图工作正常但我无法获取下拉列表值并将其存储到用户表中。我该怎么做才能获得下拉列表值？

public class RegisterViewModel
    {
        [Required]
        [DisplayName("User Name")]
        public string UserName { get; set; }
        [Required]
        [Remote("EmailAlreadyExists", "Validation", ErrorMessage = "User with this mail exists")]
        [DisplayName("Email")]
        public string Email { get; set; }
        [Required]
        [DisplayName("Password")]
        public string Password { get; set; }
        [Required]
        [DataType(DataType.Password)]
        [DisplayName("Confirm Password")]
        public string ConfirmPassword { get; set; }
        [Required]
        public IEnumerable<SelectListItem> Roles { get; set; }
    }

我的角色模型

public class Role
{
    public int Id { get; set; }
    public string  Name { get; set; }
}

查看角色是，

<div class="form-group">
    @Html.LabelFor(model => model.Roles, htmlAttributes: new { @class = "control-label col-md-2" })
    <div class="col-md-10">
        @Html.DropDownListFor(model => model.Roles, Model.Roles, "Select Roles" , new {id = "Roles" })
        @Html.ValidationMessageFor(model => model.Roles, "", new { @class = "text-danger" })
    </div>
</div>

最后我的控制器

public ActionResult Index()
{
    RegisterViewModel uvm = new RegisterViewModel();
    uvm.Roles = from r in roles
    select new System.Web.Mvc.SelectListItem
    {
        Text = r.Name,
        Value = r.Id.ToString()
    };
    return View(uvm);                 
}

[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Index(RegisterViewModel register)
{
    if (ModelState.IsValid)
    {
        string code = Guid.NewGuid().ToString();

        userRepo.Insert(new Models.User()
        {
            UserName = register.UserName,
            Email = register.Email,
            Password = register.Password,    
            /* Role = register.Roles */              
            CreatedDate = DateTime.Now,
            AuthCode = code,
            Status = false
        });  
        SendMail(register.UserName, register.Email, code);
        return RedirectToAction("Thankyou");
    } 
    return View(register);
}

Answer 1

在RegisterViewModel中添加新属性

 public class RegisterViewModel
 { 
   [Required]
                                    [DisplayName("User Name")]
                                    public string UserName { get; set; }
                                    [Required]
                                    [Remote("EmailAlreadyExists", "Validation", ErrorMessage = "User with this mail exists")]
                                    [DisplayName("Email")]
                                    public string Email { get; set; }
                                    [Required]
                                    [DisplayName("Password")]
                                    public string Password { get; set; }
                                    [Required]
                                    [DataType(DataType.Password)]
                                    [DisplayName("Confirm Password")]
                                    public string ConfirmPassword { get; set; }
                                    [Required]
                                    public IEnumerable<SelectListItem> Roles { get; set; }
   **public string SelectedRole {get;set;}**
 }

和下拉应该像bewlo

@Html.DropDownListFor(model => model.SelectedRole , Model.Roles, "Select Roles" , new {id = "Roles" })

您的控制器操作看起来像

[HttpPost]
                            [ValidateAntiForgeryToken]
                            public ActionResult Index(RegisterViewModel register)
                            {
                                if (ModelState.IsValid)
                                {
                                    string code = Guid.NewGuid().ToString();

                                    userRepo.Insert(new Models.User()
                                    {
                                        UserName = register.UserName,
                                        Email = register.Email,
                                        Password = register.Password,    
                                        Role = register.SelectedRole
                                        CreatedDate = DateTime.Now,
                                        AuthCode = code,
                                        Status = false
                                    });  
                                    SendMail(register.UserName, register.Email, code);
                                    return RedirectToAction("Thankyou");
                                } 
                                return View(register);
                            }

无法在mvc中将dropdownlist值插入数据库

1 个答案: