Question

我的班级

public partial class Team
    {
        public int TeamId { get; set; }
        public string TeamName { get; set; }
        public string TeamDescription { get; set; }
        public virtual IList<Trials> Trials { get; set; }
    }

试验是无关紧要的

 public partial class Trials
    {

        public int TrialID { get; set; }
        public string Name { get; set; }
        public int TrialTyp_RefID { get; set; }
        public bool isChk { get; set; }

        public virtual ICollection<Team> Team { get; set; }
    }

在我看来，我正在尝试将ListBoxFor与团队中的Trials绑定

@model Trials.Classes.Team
  <td colspan="2">          
              @Html.ListBoxFor(model=> model.Trials,
                      new SelectList(ViewBag.trials,"TrialID", "Name"),                   
                        new { @class = "chosen-select", data_placeholder = "Select Trials...", style = "width:500px;", tabindex = "4" }
                        )
           </td>

我无法在控制器中获得Trials calss的任何值。它显示为null但我从列表框中选择了多个值

Answer 1

多重选择仅回发原始值数组。它不会回发一组复杂的对象。

您需要具有属性的视图模型来绑定选定的Trials

public class TeamVM
{
  public int TeamId { get; set; }
  ....
  public int[] SelectedTrials { get; set; }
  public SelectList Trials { get; set; } // Assign this in your controller rather than using ViewBag
}

然后在你看来

@Html.ListBoxFor(m => m.SelectedTrials, Model.Trials)

当您回发时，Team.SelectedTrials将包含所选TrialID值的数组。

Answer 2

我将Team类更改为

  public partial class Team
        {
            public int TeamId { get; set; }
            public string TeamName { get; set; }
            public string TeamDescription { get; set; }
            public virtual IList<Trials> Trials { get; set; 
            public int[] AuthorisedTrials { get; set; }
    }

并在视图中

@model Trials.Classes.Team
  <td colspan="2">          
              @Html.ListBoxFor(model=> model.AuthorisedTrials ,
                      new SelectList(ViewBag.trials,"TrialID", "Name"),                   
                        new { @class = "chosen-select", data_placeholder = "Select Trials...", style = "width:500px;", tabindex = "4" }
                        )
           </td>

在我的控制器中，我能够获得选定试验的Vlaues

@ Html.LisboxFor模型绑定多个项目

2 个答案: