填充，並檢索MVC3

Question

在複選框列表數據我有我的查看用戶的列表：

foreach (var user in (List<GetWorkDone.Model.Accounts.User>)ViewBag.users) 
{ 
} 

和用戶是：

public class User 
{ 
    public int UserId { get; set; } 
    public string Name { get; set; } 
} 

我需要向用戶顯示的列表複選框，並獲得在選定的ActionResult僅複選框：

public ActionResult AssignUser(List<User> users) 
{ 
} 

Answer 1

使用視圖模型：

public class UserViewModel 
{ 
    public int UserId { get; set; } 
    public string Name { get; set; } 
    public boolean IsSelected { get; set; } 
} 

然後：

public class UsersController: Controller 
{ 
    public ActionResult Index() 
    { 
     var users = new UserViewModel[] 
     { 
      // TODO: obviously those could come from a database or something 
      new UserViewModel { UserId = 1, Name = "user 1" }, 
      new UserViewModel { UserId = 2, Name = "user 2" }, 
      new UserViewModel { UserId = 3, Name = "user 3" }, 
     }; 
     return View(users); 
    } 

    public ActionResult Index(UserViewModel[] users) 
    { 
     ... you could inspect the IsSelected property of each user here   
    } 
} 

終於有一個強類型的視圖：

@model UserViewModel[] 
@using (Html.BeginForm()) 
{ 
    @for (var i = 0; i < Model.Length; i++) 
    { 
     <div> 
      @Html.HiddenFor(x => x[i].UserId) 
      @Html.HiddenFor(x => x[i].Name) 
      @Html.DisplayFor(x => x[i].Name) 
      @Html.CheckBoxFor(x => x[i].IsSelected) 
     </div> 
    } 
    <button type="submit">OK</button> 
} 

而且如果你已經有一些其他的模式，那麼，適應它，並使用視圖模型：

public class AssignUserViewModel 
{ 
    public UserViewModel[] Users { get; set; } 

    ... some other properties that you already have 
} 

然後：

@model AssignUserViewModel 

@using (Html.BeginForm()) 
{ 
    @for (var i = 0; i < Model.Users.Length; i++) 
    { 
     <div> 
      @Html.HiddenFor(x => x.Users[i].UserId) 
      @Html.HiddenFor(x => x.Users[i].Name) 
      @Html.DisplayFor(x => x.Users[i].Name) 
      @Html.CheckBoxFor(x => x.Users[i].IsSelected) 
     </div> 
    } 

    ... some other fields 

    <button type="submit">OK</button> 
} 

結論：使用視圖模型 - 總是。