ASP.Net MVC 3检索复选框列表值

Question

我正在开发一个ASP.Net MVC 3 Web应用程序,我在从复选框列表中获取值时遇到了一些困难.我已经阅读了有关Stackoverflow的大部分问题,但是,我仍然遇到了一些问题.

我有一个ViewModel

public class ViewModelCheckBox
{
    public string Id { get; set; }
    public string Name { get; set; }
    public bool Checked { get; set; }
}

另一个使用上面的viewmodel的ViewModel

public class ViewModelAssignSubSpeciality
{
    public ListItem Item { get; set; }
    public IList<ViewModelCheckBox> SpecialityList { get; set; }
}

然后在我的控制器中

public ActionResult AssignSubSpeciality(int id)
{
        //Get a list of all sub-specialities
        var SpecialityList = _listService.GetListItemsByID(3).ToList();

        //Get a list of sub-specialities for the the passed in id, this is either the id of a speciality or grade
        IList<RelationshipSpecialitySub> assignedSpecialities = _listService.GetAssignedSubSpecialities(id).ToList();

        var checkBoxList = new List<ViewModelCheckBox>();

        foreach (ListItem item in SpecialityList)
        {
            ViewModelCheckBox chkBox = new ViewModelCheckBox { Id = item.listItemID.ToString(), Name = item.description };

            //If sub-speciality exists in assignedSpecialities list, then make checkbox checked
            foreach (var specilaity in assignedSpecialities)
            {
                if (specilaity.subID == item.listItemID)
                {
                    chkBox.Checked = true;
                }
                else
                {
                    chkBox.Checked = false;
                }
            }

            checkBoxList.Add(chkBox);
        }

        ViewModelAssignSubSpeciality viewModel = new ViewModelAssignSubSpeciality();
        viewModel.ListItem = _listService.GetListItemByID(id);
        viewModel.SpecialityList = checkBoxList;

        return View(viewModel);
    }

上面控制器中的代码获取所有可能的复选框列表项的列表,然后获取所有先前选择的复选框列表项的列表,它将已选中的选项设置为true.

然后,我的视图看起来像这样,循环遍历SpecialityList并为每个项创建一个复选框,并在需要时将其选定值设置为true.

<fieldset>
<legend>Specialities</legend>

@foreach (var item in Model.SpecialityList)
{
<input type="checkbox" id="@item.Id" name="@item.Name" value="@item.Id" @(item.Checked ? "checked" : "") />
<label for="@item.Id">@item.Name</label><br />
}

<input type="submit" value="Save Changes" class="sepH_b" />                                         

我的控制器中的HttpPost方法看起来像这样

    public ActionResult AssignSubSpeciality(ViewModelAssignSubSpeciality model)
    {
        //delete all sub-specialities in tbl relationshipSpecialitySub for List
        foreach (ViewModelCheckBox item in model.SpecialityList)
        {
                //_listService.DeleteSubSpecialityFromSpeciality(item.Id);
        }

        return RedirectToAction("ListItems", new { id = model.ListItem.listID });
    }

但是,当我尝试获取所选的复选框时

model.SpecialityList

我们总是空的.我不确定为什么它不包含ViewModelCheckBox列表.

有人可以帮我这个吗？

谢谢.

Answer 1

我在我的视图模型中有一个这样的数组

public class CheckBoxItem
{
   public string Code { get; set; }
   public bool IsChecked { get; set; }
   public string Label {get;set;}
}

然后我使用编辑器模板在页面上显示它们.

<p class="checkbox" style="display:inline">
<span style="margin-left:5px;">
    @Html.HiddenFor(x => x.Code)           
    @Html.CheckBoxFor(x => x.IsChecked)
</span>
@Html.LabelFor(x => x.IsChecked, Model.Label)
</p>

在视图中,我使用以下内容在页面上显示它们.

@Html.EditorFor(m => m.MyEnumerableOfCheckBoxItem)

回发表单时,模型已正确绑定.

希望这可以帮助.