ASP.Net MVC 3获取复选框列表值 [英] ASP.Net MVC 3 Retrieve Checkbox List Values

问题描述

我正在开发一个ASP.Net MVC 3 Web应用程序，我有从的CheckBoxList得到的值一定的困难。我已阅读大部分的＃2的问题在这附近，但是，我仍然有一些问题。

I am developing an ASP.Net MVC 3 Web application and I am having some difficulties with getting the values from a checkboxlist. I have already read most of the questions on Stackoverflow around this area, however, I am still having some issues.

我有一个视图模型

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

另一个视图模型而用上面视图模型

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

然后在我的控制器

Then in my controller

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);
    }

在code在上面的控制器让所有的可能的复选框列表项的列表，然后让所有pviously选中的复选框列表项$ P $为它设置检查选项设置为true的列表。

The code in the controller above is getting a list of all the possible checkbox list items, then getting a list of all the previously selected checkbox list items for which it sets the checked option to true.

我的视图则看起来像这样，循环在SpecialityList，并对每个项目创建一个复选框，而且如果需要的话其选定的值设置为true。

My View then looks like this, looping over the SpecialityList and creating a checkbox for each item, and also setting its selected value to true if needs be.

<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HttpPost在我的控制器方法，那么看起来像这样

My HttpPost method in my controller then looks like this

    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 });
    }

然而，当我试图让在选定的复选框

However, when I try to get the selected checkboxes in

model.SpecialityList

据我们永远空。我不知道为什么它不包含ViewModelCheckBox的列表。

It us always null. I am not sure why it doesnt contain a list of ViewModelCheckBox.

任何人都可以请帮我这个？

Can anyone please help me with this?

感谢您。

推荐答案

我有一个这些在可枚举我视图模型

I have an Enumerable of these in my view model

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出来。

I then use an editor template to display them on the page.

<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>

在我用下面的页面上显示它们的看法。

In the view I use the following to display them on the page.

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

当表单被调回该模型是正确的约束。

When the form is posted back the model is correctly bound.

希望这有助于。

这篇关于ASP.Net MVC 3获取复选框列表值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！