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我有一个带有 2 个列表框(list1, list2)的网页,我可以将项目从一个列表框移动到另一个列表框并返回。当我单击提交按钮时,我想将list2中的所有项目值返回给 httppost 方法。

我有3个问题:

  1. 如何确定所选列表的属性?
  2. 如何有一个初始的空列表(对于list2)?list1已填充项目?
  3. 单击提交按钮时,如何将所有list2项返回模型?

模型:

public class TestModel
{
    public List<SelectListItem> OptionList { get; set; }
    public List<SelectListItem> SelectedOptionList { get; set; }
    public string[] SelectedOptions { get; set; }
}

控制器:

private TestModel testModel  = new TestModel();

public ActionResult TestPage()
{
    ViewBag.Message = "Test Page";

    testModel.OptionList = new List<SelectListItem>();

    for (int i = 1; i <= 100; i++)
    {
        SelectListItem item = new SelectListItem();
        item.Text = "Option " + i.ToString();
        item.Value = item.Text;

        testModel.OptionList.Add(item);
    }

    return View("TestView", testModel);
}

[HttpPost]
public ActionResult TestPage(TestModel formModel)
{
    testModel.SelectedOptionList = formModel.SelectedOptionList;
    testModel.SelectedOptions = formModel.SelectedOptions;

    //do something
    return RedirectToAction("TestPage");
}

看法:

@model EngineeringDataAnalysisGui.Models.TestModel

@{
    ViewBag.Title = @ViewBag.Message;
}

@section Subtitle
{
    @ViewBag.Message
}

<table width="100%">
@using (Html.BeginForm("TestPage", "RetrieveData", FormMethod.Post))
{
    <tr>
        <td>Event List:</td>
        <td>@Html.ListBox("lstEventSelection", Model.OptionList, new { id = "list1", Multiple = "multiple", Size = 15, style = "width: 100%;" })</td>
    </tr>
    <tr>
        <td></td>
        <td>
            <table style="text-align:center; width: 100%">
                <tr>
                    <td id="buttonCol">
                        <input type="button" id="btnAddAllEvent" title="Add All Events" onclick="moveAllOptions('list1','list2', true)" />
                        <input type="button" id="btnAddEvent" title="Add Selected Events" onclick="moveSelectedOptions('list1','list2', true)" />
                    </td>
                    <td id="buttonCol">
                        <input type="button" id="btnRemoveEvent" title="Remove Selected Events" onclick="moveSelectedOptions('list2','list1', true)" />
                        <input type="button" id="btnRemoveAllEvent" title="Remove All Events" onclick="moveAllOptions('list2','list1', true)" />
                    </td>
                </tr>
            </table>
        </td>
    </tr>
    <tr>
        <td>Selected Event List:</td>
        @*Not sure how to add the listbox*@
        <td>@*Wrong*@@Html.ListBoxFor(x => x.SelectedOptions, Model.SelectedOptionList, new { id = "list2", Multiple = "multiple", Size = 15, style = "width: 100%;" })</td>
    </tr>
    <tr>
        <td><input type="submit" value="submit" /></td>
    </tr>
}
</table>
4

1 回答 1

11

1)如何确定所选列表的属性?
@Html.ListBoxFor(x => x.SelectedOptions, new MultiSelectList(Model.SelectedOptionList), new { id = "list2", Multiple = "multiple", Size = 15, style = "width: 100%;" })

2)如何有一个初始的空列表(对于list2)?list1 已填充项目。在控制器中设置一个空列表testModel.SelectedOptionList = new List<SelectListItem>();

3)单击提交按钮时如何将所有list2项目返回模型
可能您需要在提交之前将list2中的所有项目设置为选中(使用jquery)。list2 项目中的所有选定项目将在提交时绑定到 TestModel.SelectedOptions。

请环顾四周,SO 中已经有很多与 Html.ListBoxFor 相关的答案。例如 ,在 ListBoxFor 中选择值的挑战

于 2012-08-22T04:21:45.027 回答