[英]@Html.ListBoxFor usage and creation questions
我有一个带有2个列表框的网页( list1,list2 ),我可以将项目从一个列表框移到另一个列表框,然后再移回另一个列表框。 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:
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");
}
视图:
@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>
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
提交之前,可能需要将list2中的所有项目设置为选中状态(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
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