传递linq查询来查看

Question

我做了一个linq查询,我想传递给视图,但它给了我这个错误

The model item passed into the dictionary is of type 'System.Data.Entity.Infrastructure.DbQuery`1[<>f__AnonymousType4`2[System.String,System.String]]', but this dictionary requires a model item of type 'System.Collections.Generic.IEnumerable`1

我的ViewModel

  public class ManageScoreViewModel
     {
         public string fullName { get; set; }
         public string teamName { get; set; }
     }

调节器

  public ActionResult Index()
        {
            MyteamViewModel ms = new MyteamViewModel ();
            var vm = (from u in db.Users
                     join tm in db.Team_Members
                     on u.user_id equals tm.user_id
                     join t in db.Teams
                     on tm.team_id equals t.team_id
                     orderby t.name
                     select new { fullName = u.firstName + u.lastName, teamName = t.name });
          //  var vmlist = vm.ToList();

            return View(vm);
        }

视图是IEnumerable类型

@model IEnumerable<CTA2._0.ViewModels.ManageScoreViewModel>
@foreach (var item in Model)
{
    <tr>
        <td>
            @Html.DisplayFor(modelItem => item.fullName)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.teamName)
        </td>

我尝试将查询转换为列表(var vmlist = vm.ToList();).没工作.任何帮助,将不胜感激.

Answer 1

您的视图是强类型的ManageScoreViewModel集合,但您的linq查询使用投影返回一个匿名对象.您需要返回一个ManageScoreViewModel对象列表.您还可以ToList()在linq表达式上应用方法

更改

select new { fullName = u.firstName + u.lastName, teamName = t.name });

至

select new ManageScoreViewModel { fullName = u.firstName + u.lastName,
                                                  teamName = t.name }).ToList();