ASP.NET MVC 3用户下拉列表

Question

在我的应用程序中，我已将我的UserId与我数据库中的表关联。我需要这个，当我创建一个新项目时，我可以从下拉列表中选择用户名。并且'可以使用元素viewbag来做到这一点？

@Html.EditorFor(model => model.UserId) 

我使用默认的成员资格提供这样我就可以不使用实体框架对于这个问题

编辑

EDIT 2

这是我的行动创造：

[HttpPost] 
public ActionResult Create(Employe employe) 
{ 
     var users = Roles.GetUsersInRole("Admin"); 
     SelectList list = new SelectList(users); 
     ViewBag.Users = list; 
     if (ModelState.IsValid) 
     { 
      **employe.EmployeID = users;** 
      db.Employes.Add(employe); 
      db.SaveChanges(); 
} 

这不起作用。错误是：

无法隐式转换类型 '字符串[]' 到 '字符串'

我对Employee

public class Employee 
{ 
     [Key] 
     public int EmployeID { get; set; } 

     public Guid UserId { get; set; } 

     public string Name { get; set; } 

     [ForeignKey("UserId")] 
     public virtual MembershipUser User 
     { 
      get 
      { 
       return Membership.GetUser(this.Name); //Changed this to Name 
      } 
     } 

    } 
} 

视图模型：

@Html.DropDownList("Users", ViewBag.Users as SelectList); 

我导致UserId字段不是UserId但这种000000-000000-0000000-00000

Answer 1

如何设置用户的列表作为ViewBack一个SelectItem 是的，你应该能够通过你的收集到ViewBag要做到这一点，然后创建你从它下拉列表：

在你的控制器

 var users = Roles.GetUsersInRole("Admin"); 
     SelectList list = new SelectList(users); 
     ViewBag.Users = list; 

在您的视图（如果你使用剃刀）

@Html.DropDownList("Users", ViewBag.Users as SelectList); 

了解更多关于SelectListItem这里：

• http://msdn.microsoft.com/en-us/library/system.web.mvc.selectlistitem.aspx

还检查了：

• How can I get this ASP.NET MVC SelectList to work?
• Problem with ASP.Net MVC SelectLIst and List<SelectListItems>

问题更改为更多。这里是我的想法来解决这个问题：

控制器：

public ActionResult Mirko() { 
    List<SelectListItem> items = new List<SelectListItem>();  
    foreach (string userName in Roles.GetUsersInRole("Admin")) { 
     var user = Membership.GetUser(userName); 
     SelectListItem li = new SelectListItem { 
      Value = user.ProviderUserKey.ToString(), 
      Text = user.UserName, 
     }; 
     items.Add(li); 
    } 
    items.Add(new SelectListItem { Text = "Please Select...", Value = "na" , Selected = true}); 
    ViewBag.Users = items; 
    return View();     
} 

[HttpPost] 
public ActionResult Mirko(Employee employee) { 
    if(IsValideEmployee(employee)) { 
     /*Only used to show that user was retrieved*/ 
     TempData["message"] = "Saved Employee"; 
     TempData["user"] = employee.User; 

     /* employeeRepository.Save(employee) */ 

     /* Redirect to where you want to go */ 
     return RedirectToAction("Mirko", "Home"); 
    } 
    return View(employee); 
} 

private bool IsValideEmployee(Employee emp) { 
    if (emp.Name == "na") 
     ModelState.AddModelError("UserId", "You must select a user!"); 
    /*Do some validation here*/ 
    //ModelState.Add("Name", "You must set the user name!") 
    return ModelState.IsValid; 
} 

查看

@model StackOverFlowExample.Models.Employee 
@{ 
    MembershipUser user = null; 
    ViewBag.Title = "Mirko Example"; 
    var users = ViewBag.Users as IEnumerable<SelectListItem>; 
} 

@if (TempData["message"] != null) { 
    user = TempData["user"] as MembershipUser; 
    <h3>@TempData["message"]</h3> 
    <div> 
     <span>You selected @user.UserName</span> 
     <ul> 
      <li>Email: @user.Email</li> 
      <li>Last Logged In: @user.LastLoginDate.ToString("d")</li> 
      <li>Online: @user.IsOnline</li> 
     </ul> 
    </div> 
} 

@using (@Html.BeginForm()) { 
    <label for="UserId">Associate Employee To User:</label> 
    @Html.DropDownListFor(m => m.UserId, @users) 
    @Html.HiddenFor(m => m.Name)            
    <input type="submit" value="Save" id="save-employee"/> 
} 
<div id="status" style="display:none;"></div> 

<script type="text/javascript"> 
    $(document).ready(function() { 
     $("#UserId").change(function() { 
      //Set value of name 
      $("#Name").val($(this).children("option:selected").text());    
     }); 
     $("#save-employee").click(function (e) { 
      var value = $("#Name").val(); 
      if (value == "" || value == "na") { 
       e.preventDefault(); 
       $("#status").html("<h3>You must select a user!</h3>").toggle(); 
      } 
     }); 
    }); 
</script>