Question

我有一个Menusettings页面，显示数据库中的所有menuname（Menutable）。我想将所有细节保存到MenuRole表中。为此我想我必须迭代每个menuitem并将详细信息存储在MenuRole表中（这是正确的方法吗？）。但问题是我得到MenuList为null.So我无法迭代menulist。我也不知道如何将checkbox值绑定到MenuRole表。

视图

型号

public class MenuRoleVM
{
    public int? RoleId { get; set; }
    public SelectList RoleList { get; set; }
    public MenuRole MenuRole { get; set; }
    public IEnumerable<Menu> MenuList { get; set; }
}
 public partial class MenuRole
{
    public int Id { get; set; }
    public Nullable<int> MenuID { get; set; }
    public Nullable<int> RoleID { get; set; }
    public Nullable<System.DateTime> TransactionTime { get; set; }
    public bool CanAdd { get; set; }
    public bool CanEdit { get; set; }
    public bool CanDelete { get; set; }
    public bool CanView { get; set; }

    public virtual Menu Menu { get; set; }
    public virtual Role Role { get; set; }
}

 public partial class Menu
{
    public Menu()
    {
        this.MenuRoles = new HashSet<MenuRole>();
    }

    public int Id { get; set; }
    public string MenuName { get; set; }
    public string NavigateUrl { get; set; }
    public Nullable<int> ParentID { get; set; }

    public virtual ICollection<MenuRole> MenuRoles { get; set; }
}

用于绑定视图的控制器

 public ActionResult Add()
    {
        var _menuRoleVM = new MenuRoleVM
         {
             RoleList = new SelectList(_db.Roles.ToList(), "Id", "RoleName"),
             MenuList = _db.Menus.Where(m => m.NavigateUrl != "#"),
             MenuRole = new MenuRole()
         };
        return View(_menuRoleVM);

    }

HTML标记视图

@model SMS.Models.ViewModel.MenuRoleVM

@foreach (var item in Model.MenuList.Select((x, i) => new { Data = x, Index = i }))
 {
   <tr>
       <td>
           <input type="checkbox" class="minimal checkAll" />
       </td>
       <td>@item.Data.MenuName</td>
       <td>
          @Html.CheckBoxFor(m => m.MenuRole.CanAdd, new { @class = "minimal single" })
       </td>
       <td>
        @Html.CheckBoxFor(m => m.MenuRole.CanEdit, new { @class = "minimal single" })
       </td>
       <td>
         @Html.CheckBoxFor(m => m.MenuRole.CanDelete, new { @class = "minimal single" })
        </td>
        <td>
          @Html.CheckBoxFor(m => m.MenuRole.CanView, new { @class = "minimal single" })
        </td>

      </tr>
     }

非常感谢任何帮助？

Answer 1

您需要具有代表您要显示/编辑内容的视图模型

public class MenuVM
{
  public int ID { get; set; }
  public string Name { get; set; }
  public bool CanAdd { get; set; }
  public bool CanEdit { get; set; }
  public bool CanDelete { get; set; }
  public bool CanView { get; set; }
}

public class MenuRoleVM
{
  public int? RoleId { get; set; }
  public SelectList RoleList { get; set; }
  public List<MenuVM> MenuList { get; set; }
}

并在视图中

@model MenuRoleVM
@using (Html.BeginForm())
{
  @Html.DropDownListFor(m => m.RoleId, Model.RoleList)
  for(int i = 0; i < Model.MenuList.Count; i++)
  {
    @Html.HiddenFor(m => m.MenuList[i].ID)
    @Html.DisplayFor(m => m.MenuList[i].Name)
    @Html.CheckBoxFor(m => m.MenuList[i].CanAdd)
    @Html.CheckBoxFor(m => m.MenuList[i].CanEdit)
    ....
  }
  <input type="submit" ... />
}

绑定模型以将多个记录保存到表的正确方法

1 个答案: