本篇內容主要講解“ASP.NET MVC如何實現多選下拉框”,感興趣的朋友不妨來看看。本文介紹的方法操作簡單快捷,實用性強。下面就讓小編來帶大家學習“ASP.NET MVC如何實現多選下拉框”吧!
借助Chosen Plugin可以實現多選下拉框。

設置選項數量,比如設置最多允許2個選項:

考慮到多選下拉<select multiple="multiple"...></select>選中項是string數組,Model應該這樣設計:
using System.Collections.Generic;
using System.Web.Mvc;
namespace MvcApplication1.Models
{
public class CarVm
{
public string[] SelectedCars { get; set; }
public IEnumerable<SelectListItem> AllCars { get; set; }
}
}using System.Collections.Generic;
using System.Linq;
using System.Web.Mvc;
using MvcApplication1.Models;
namespace MvcApplication1.Controllers
{
public class HomeController : Controller
{
public ActionResult Index()
{
CarVm carVm = new CarVm();
carVm.SelectedCars = new string[]{"1","2"};
carVm.AllCars = GetAllCars();
return View(carVm);
}
[HttpPost]
public ActionResult SaveCars(CarVm carVm)
{
if (ModelState.IsValid)
{
return View(carVm);
}
return RedirectToAction("Index", carVm);
}
private IEnumerable<SelectListItem> GetAllCars()
{
List<SelectListItem> allCars = new List<SelectListItem>();
allCars.Add(new SelectListItem() {Value = "1",Text = "奔馳"});
allCars.Add(new SelectListItem() { Value = "2", Text = "寶馬" });
allCars.Add(new SelectListItem() { Value = "3", Text = "奇瑞" });
allCars.Add(new SelectListItem() { Value = "4", Text = "比亞迪" });
allCars.Add(new SelectListItem() { Value = "5", Text = "起亞" });
allCars.Add(new SelectListItem() { Value = "6", Text = "大眾" });
allCars.Add(new SelectListItem() { Value = "7", Text = "斯柯達" });
allCars.Add(new SelectListItem() { Value = "8", Text = "豐田" });
allCars.Add(new SelectListItem() { Value = "9", Text = "本田" });
return allCars.AsEnumerable();
}
}
}Home/Index.cshtml視圖中,需要引用Chosen Plugin的css和js文件:
@model MvcApplication1.Models.CarVm
@{
ViewBag.Title = "Index";
Layout = "~/Views/Shared/_Layout.cshtml";
}
<h3>Index</h3>
<link href="~/Content/chosen.css" rel="external nofollow" rel="stylesheet" />
@using (Html.BeginForm("SaveCars", "Home", FormMethod.Post))
{
@Html.LabelFor(m => m.SelectedCars,"最多選擇2個選項") <br/>
@Html.ListBoxFor(m => m.SelectedCars, Model.AllCars, new {@class="chosen", multiple="multiple", }) <br/>
<input type="submit" value="提交"/>
}
@section scripts
{
<script src="~/Scripts/chosen.jquery.min.js"></script>
<script type="text/javascript">
$(function() {
$('.chosen').chosen({
max_selected_options: 2
});
$(".chosen-deselect").chosen(
{
allow_single_deselect: true
});
$(".chosen").chosen().change();
$(".chosen").trigger('liszt:updated');
});
</script>
}到此,相信大家對“ASP.NET MVC如何實現多選下拉框”有了更深的了解,不妨來實際操作一番吧!這里是億速云網站,更多相關內容可以進入相關頻道進行查詢,關注我們,繼續學習!
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