无法在视图上显示MVC 5验证错误消息

Question

如果用户没有正确输入页面上的所有内容，则使用MVC 5验证显示错误消息时存在特定问题。表单的HTML标记是如下：

   @using (Html.BeginForm("RegisterDo", "User", FormMethod.Post)) 
       { 
        <div> 
         @Html.ValidationMessageFor(model => model.FirstName) 
         @Html.TextBoxFor(m => m.FirstName, new { placeholder = "First name", @class = "form-control", @type = "text" }) 



        </div> 
        <div> 
         @Html.ValidationMessageFor(model => model.LastName) 
         @Html.TextBoxFor(m => m.LastName, new { placeholder = "Last name", @class = "form-control", @type = "text" }) 


        </div> 
        <div> 
         @Html.ValidationMessageFor(model => model.Email) 
         @Html.TextBoxFor(m => m.Email, new { placeholder = "Email", @class = "form-control", @type = "email" }) 

        </div> 
        <div> 
         @Html.ValidationMessageFor(model => model.Password) 
         @Html.TextBoxFor(m => m.Password, new { placeholder = "Password", @class = "form-control", @type = "password" }) 

        </div> 
        <div> 
         @Html.ValidationMessageFor(model => model.PasswordConfirm) 
         @Html.TextBoxFor(m => m.PasswordConfirm, new { placeholder = "Confirm password", @class = "form-control", @type = "password" }) 


        </div> 
        <div> 
         @Html.ValidationMessageFor(model => model.SelectedCountryId) 
         @Html.DropDownListFor(model => model.SelectedCountryId, Model.Countries, "-- Please select a country --", new { @class = "select2_single form-control select2-hidden-accessible", @tabindex = "-1" }) 

        </div> 
        <div> 
         <input class="btn btn-default submit" type="submit" value="Register" /> 
        </div> 
       } 

请注意，我有我需要填写最初当视图呈现一个下拉列表（即我必须通过国家的顺序列出到视图正确渲染它）。我在这里遇到的问题是，当我点击“注册”按钮时，我的操作中的代码不会全部触发。相反，我只是得到我的浏览器的网址如下：

http://localhost:60617/user/register?FirstName=&LastName=&Email=&Password=&PasswordConfirm=&SelectedCountryId= 

和错误消息根本不显示...代码不触发在所有...

这是我的两个动作：

[HttpPost] 
     [ActionName("Register")] 

     public ActionResult DoRegister(UserRegistrationViewModel model) 

     { 
      if (ModelState.IsValid) 
      { 
       var user = new Users(); 
       user.FirstName = model.FirstName; 
       user.LastName = model.LastName; 
       user.Email = model.Email; 
       user.PasswordSalt = Helpers.PasswordHelper.CreateSalt(40); 
       user.PasswordHash = Helpers.PasswordHelper.CreatePasswordHash(model.Password, user.PasswordSalt); 
       user.CountryId = Convert.ToInt32(model.SelectedCountryId); 
       user.Active = true; 
       Connection.ctx.Users.Add(user); 
       Connection.ctx.SaveChanges(); 
       var role = new UserRoles(); 
       role.RoleId = 2; 
       role.UserId = user.UserId; 
       role.Active = true; 
       user.UserRoles.Add(role); 
       Connection.ctx.SaveChanges(); 
       return RedirectToAction("Success"); 
      } 
      else 
      { 
       return View("Register", model); 
      } 
     } 
     public ActionResult Register() 
     { 
      var model = new UserRegistrationViewModel(); 
      var countries = Connection.ctx.Countries.OrderBy(x => x.CountryName).ToList(); 
      model.Countries = new SelectList(countries, "CountryId", "CountryName"); 
      return View(model); 
     } 

首先行动负责渲染视图，当用户注册第二个是负责逻辑...

我在做什么错在这里。我在这里丢失了一些东西很明显，但我只是不能看到它......这里:(

编辑是视图模型：

public class UserRegistrationViewModel 
    { 
     [Required(ErrorMessage = "First name is required!")] 
     public string FirstName { get; set; } 

     [Required(ErrorMessage = "Last name is required!")] 
     public string LastName { get; set; } 

     [Required(ErrorMessage = "Email name is required!")] 
     public string Email { get; set; } 

     [Required(ErrorMessage = "Password name is required!")] 
     public string Password { get; set; } 

     [Required(ErrorMessage = "Password confirmation name is required!")] 
     public string PasswordConfirm { get; set; } 
     [Required(ErrorMessage = "Country needs to be selected!")] 
     public int SelectedCountryId { get; set; } 


     public SelectList Countries { get; set; } 
} 

Answer 1

添加[ActionName("Register")]属性您的帖子方法：

[HttpPost] 
[ActionName("Register")] 
public ActionResult RegisterDo(UserRegistrationViewModel model) 
{ 
    if (ModelState.IsValid) 
    { 
     var user = new Users(); 
     user.FirstName = model.FirstName; 
     user.LastName = model.LastName; 
     user.Email = model.Email; 
     user.PasswordSalt = Helpers.PasswordHelper.CreateSalt(40); 
     user.PasswordHash = Helpers.PasswordHelper.CreatePasswordHash(model.Password, user.PasswordSalt); 
     user.CountryId = Convert.ToInt32(model.SelectedCountryId); 
     user.Active = true; 
     Connection.ctx.Users.Add(user); 
     Connection.ctx.SaveChanges(); 
     var role = new UserRoles(); 
     role.RoleId = 2; 
     role.UserId = user.UserId; 
     role.Active = true; 
     user.UserRoles.Add(role); 
     Connection.ctx.SaveChanges(); 
     return RedirectToAction("Success"); 
    } 
    else 
    { 
     return View(model); 
    } 
} 

Answer 2

else 
{ 
    var countries = Connection.ctx.Countries.OrderBy(x => x.CountryName).ToList(); 
    ViewBag.Countries = new SelectList(countries, "CountryId", "CountryName"); 
    return View("Register", model); 
} 

再次通过一个模型视图

Answer 3

一切，除了这应该是

return View("Register", model); 

传递模型才能查看这些else部分就好了错误消息。 而且切中操作方法 无论是在查看更改动作的名称为 “RegisterDo”

或

添加

[ActionName("Register")] 
[HttpPost] 
public ActionResult RegisterDo(UserRegistrationViewModel model)