Question

我有一个我在视图中使用的模型：

using (var db = new FieldSaverContext())
{
    AspNetUser user = (from p in db.AspNetUsers
                       where p.Id == id
                       select p).Include(m => m.AspNetRoles) .First();
    model.AUser = user;

    List<AspNetRole> roles = (from r in db.AspNetRoles
                              select r).ToList();
    model.RoleList = roles;

    List<ListID> ids = (from l in db.ListIDs
                        select l).ToList();
    model.ListIDList = ids;

    List<ViewerList> viewerLists = (from v in db.ViewerList
                                    select v).ToList();
    model.ViewerList = viewerLists;

}

这就是我的观点：

@using (Html.BeginForm("Edit", "Users"))
{
  <div class="container containerEdit">
    <div class="col-md-9">
      <div class="col-md-6">
        <div class="form-group">
          @Html.LabelFor(m => m.AUser.Id)
          <label>@Html.DisplayFor(m => m.AUser.Id)</label>
        </div>
        <div class="form-group">
          @Html.DisplayFor(m => m.AUser.FirstName)
          @Html.TextBoxFor(m => m.AUser.FirstName)
        </div>
        <div class="form-group">
          @Html.LabelFor(m => m.AUser.PhoneNumber)
          @Html.TextBoxFor(m => m.AUser.PhoneNumber)
        </div>
        <div class="form-group">
          @Html.LabelFor(m => m.ListIDList)
          @Html.DropDownListFor(n => n.ListIDList, new SelectList(Model.ListIDList, "ID", "Value"))
        </div>
        <div class="form-group">
          @Html.LabelFor(m => m.AUser.Note1)
          @Html.TextBoxFor(m => m.AUser.Note1)
        </div>
        <div class="form-group">
          @Html.LabelFor(m => m.AUser.Note2)
          @Html.TextBoxFor(m => m.AUser.Note2)
        </div>
      </div>
      <div class="col-md-6">
        <div class="form-group">&nbsp;</div>
        <div class="form-group">
          @Html.LabelFor(m => m.AUser.LastName)
          @Html.TextBoxFor(m => m.AUser.LastName)
        </div>
        <div class="form-group">
          @Html.LabelFor(m => m.AUser.Email)
          @Html.TextBoxFor(m => m.AUser.Email)
        </div>
        <div class="form-group">
          <label>Report Viewer</label>
          @Html.DropDownListFor(v => v.AUser.ViewerId, new SelectList(Model.ViewerList, "ID", "Value"))
        </div>
      </div>
      @Html.HiddenFor(v => v.AUser.Id)
    </div>
    <div class="col-md-3">
      @foreach (AspNetRole role in Model.RoleList)
      { @Html.CheckBox(role.Name, Model.AUser.AspNetRoles.Any(userRole => userRole.Id == role.Id)) @Html.Label(role.Name)<br /> }
    </div>
  </div>
  <div class="col-md-8">
    <input type="submit" class="btn btn-success btn-lg btnSaveEdit" value="Save" />
  </div>
}

当回发发生时，我能够获取AUser的值，但我没有得到复选框中使用的Model.RoleList的任何值。我想检查从RoleList检查哪些复选框，并将这些角色分配给用户。

知道我错过了什么吗？

提前致谢，Laziale

更新：

编辑行动：

[HttpGet]
public ActionResult Edit(int? id)
{
    ManageViewModel model = new ManageViewModel();


        using (var db = new DbContext())
        {
            AspNetUser user = (from p in db.AspNetUsers
                               where p.Id == id
                               select p).Include(m => m.AspNetRoles) .First();
            model.AUser = user;

            List<AspNetRole> roles = (from r in db.AspNetRoles
                                      select r).ToList();

            model.RoleList = roles;

            List<ListID> ids = (from l in db.ListIDs
                select l).ToList();

            model.ListIDList = ids;

            List<ViewerList> viewerLists = (from v in db.ViewerList
                select v).ToList();

            model.ViewerList = viewerLists;

        }
    return View(model);
}

[HttpPost]
public ActionResult Edit(ManageViewModel model)
{
    AspNetUser user = model.AUser;

    using (var db = new DbContext())
    {
        AspNetUser dbUser = (from u in db.AspNetUsers
            where u.Id == model.AUser.Id
            select u).First();

        dbUser.FirstName = model.AUser.FirstName;
        dbUser.LastName = model.AUser.LastName;
        dbUser.Email = model.AUser.Email;
        dbUser.PhoneNumber = model.AUser.PhoneNumber;

        dbUser.Note1 = model.AUser.Note1;
        dbUser.Note2 = model.AUser.Note2;
        dbUser.ViewerId = model.AUser.ViewerId;

        db.SaveChanges();
    }

    return View();
}

Answer 1

问题是角色未绑定到您的视图模型。所以这就是你要做的事情：

创建新的角色视图模型：

public class RoleViewModel
{
  public int Id { get; set; }   
  public string Name { get; set; }
  public bool Selected { get; set; }
}

修改您的ManageUserViewModel以获得RoleViewModel而非AspNetRole的列表：

public class ManageUserViewModel
{
  public List<RoleViewModel> Roles { get; set;}
  // Your other properties
}

更改编辑以从可用角色设置Roles属性：

public ActionResult Edit(int? id)
{
   // beginning of your action
   List<AspNetRole> roles = from r in db.AspNetRoles
                            select r;
   model.Roles = new List<RoleViewModel>();
   foreach(AspNetRole role in roles){
     model.Roles.Add(new RoleViewModel { 
       Id = role.Id, 
       Name = role.Name,
       Selected = user.AspNetRoles.Any(userRole => userRole.Id == role.Id)
     });
   }
   // end of your action
}

将您的其他操作更改为

 public ActionResult Edit(ManageViewModel model){
  // beginning of your action
  // remove roles from user
  List<AspNetRoles> newRoles = new List<AspNetRoles>();
  foreach(RoleViewModel role in model.Roles){
    newRole.Add(db.AspNetRoles.Find(role.id))
  } 
  // set your user roles from newRoles
  // end of your action 
}

在您的视图中，通过以下方式更改复选框部分：
```
@Html.EditorFor(model => model.Roles)
```

最后创建一个Shared/EditorTemplate/RoleViewModel.cshtml文件：

@model RoleViewModel
@Html.HiddenFor(model => model.Id)
@Html.CheckBoxFor(model => model.Selected)
@Html.DisplayFor(model => model.Name)

Answer 2

将@foreach (AspNetRole role in Model.RoleList)替换为for循环

重构您的AspNetRole viewModel以包含Selected属性

public class AspNetRole
{
   public int Id { get; set; }   
   public string Name { get; set; }
   public bool Selected { get; set; } // <- new property
}

从您AspNetRoles

ViewModel

您将在表格

参见示例https://dotnetfiddle.net/QbUxi0

使用html.beginform发布的mvc5模型缺少一些属性

2 个答案: