twitter-bootstrap Bootstrap Multiselect 获取 HttpPost 上的选定值
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Bootstrap Multiselect Get Selected values on HttpPost
提问by user3035024
I'm using this Bootstrap Multiselectand my problem is that I cant get the selected values on HttpPost on ASP.Net MVC.
我正在使用这个Bootstrap Multiselect，我的问题是我无法在 ASP.Net MVC 上的 HttpPost 上获得选定的值。
Problems Encountered:
遇到的问题：
after clicking save, Only the first selected value is the present on the model. (SOLVED)
after clicking save, Only the first selected value is the present on the dropdownlist.
单击保存后，只有第一个选定的值出现在模型上。（已解决）
单击保存后，只有第一个选定的值出现在下拉列表中。
Sample.chtml:
示例.chtml：
@model SampleProject.Models.SampleViewModel
@using (Html.BeginForm())
{
@Html.DropDownListFor(model => model.Selected, new SelectList(Model.List, "value", "text"), new { @class = "multiselect form-control", multiple = "multiple" })
<input type="submit" value="Save" />
}
Model:
模型：
public class SampleViewModel
{
public string[] Selected { get; set; }
public SelectList List { get; set; }
}
Controller:
控制器：
public class DashboardController : Controller
{
public ActionResult Sample()
{
SampleViewModel model = new SampleViewModel();
model.List = new SelectList(new List<string>() { "1", "2", "3" });
return View(model);
}
[HttpPost]
public ActionResult Sample(SampleViewModel model)
{
model.List = new SelectList(new List<string>() { "1", "2", "3" });
return View(model);
}
}
Selection:
选择：
I cant get the selected values correctly on HttpPost
我无法在 HttpPost 上正确获取所选值
Code Behind/HttpPost: (Wrong)
代码隐藏/HttpPost：（错误）
After HttpPost: (Correct)
HttpPost 之后：（正确）
回答by
A <select multiple="multiple">posts back an array of values (not a single value). You property Selectedneeds to be IEnumerable, for example
A<select multiple="multiple">回发一组值（不是单个值）。例如，您的财产Selected必须是IEnumerable
public string[] Selected { get; set; }
Side note: Since the text and value properties are the same, you can simplify you code by making the Listproperty SelectList
旁注：由于 text 和 value 属性相同，您可以通过使List属性简化代码SelectList
public SelectList List { get; set; }
and then in the controller
然后在控制器中
model.List = new SelectList(new List<string>() { "1", "2", "3" })
(although its not clear why you would not use int)
（虽然不清楚你为什么不使用int）
回答by peterV
Didn't see this answer anywhere, so to solve the issue with having only 1 item selected after the post back you need to use:
在任何地方都没有看到此答案，因此要解决在回发后仅选择 1 个项目的问题，您需要使用：
@Html.ListBoxFor(..
instead of @Html.DropDownListFor
