Question

目标：
当我选择月份的下拉列表时，下拉列表年份和月份中的所选数据将被转移到actionresult索引的参数，而不使用提交按钮。当您在月份的下拉列表中进行选择时，数据将被发送到控制器。

当数据输入到参数并结束到视图（）然后我希望刷新网页。

问题：
我不知道该怎么做。

的信息：
*我在VS2013上使用asp.net mvc 4 *请记住，我必须拥有“ViewBag.YearList = Yearlist;”和ViewBag.MonthList = monthlist;“因为它用于生产阶段。
* https://dotnetfiddle.net/Hg9CKn
*您可以说下拉列表的链接类似于@Html.ActionLink("LINK","Index", "Home", new {@year = *here*, @year = *here*}) *当您单击下拉列表一个月时，我希望在显示cshtml中的信息之前从头开始刷新网页索引（如果可能）。

谢谢！

using System;
using System.Web.Mvc;
using System.Collections.Generic;

namespace HelloWorldMvcApp
{
    public class HomeController : Controller
    {
        [HttpGet]
        public ActionResult Index(string year, string month)
        {

            if (year == null)
            {
                year = "2000";
            }

            if (month == null)
            {
                month = "1";
            }

            List<SelectListItem> Yearlist = GetYear(year);

            List<SelectListItem> monthlist = GetMonth(month);

            ViewBag.YearList = Yearlist;
            ViewBag.MonthList = monthlist;          


            return View();
        }


        private List<SelectListItem> GetYear(string selectedyear)
        {
            List<SelectListItem> Yearlist = new List<SelectListItem>();

            Yearlist.Add(new SelectListItem
            {
                Selected = "2000" == selectedyear ? true : false,
                Text = "2000",
                Value = "2000"
            });

            Yearlist.Add(new SelectListItem
            {
                Selected = "2001" == selectedyear ? true : false,
                Text = "2001",
                Value = "2001"
            });

            return Yearlist;

        }



        private List<SelectListItem> GetMonth(string selectedmonth)
        {

            List<SelectListItem> monthlist = new List<SelectListItem>();


            monthlist.Add(new SelectListItem
            {
                Selected = "0" == selectedmonth ? true : false,
                Text = "All months",
                Value = "0"
            });

            monthlist.Add(new SelectListItem
            {
                Selected = "1" == selectedmonth ? true : false,
                Text = "Jan",
                Value = "1"
            });

            monthlist.Add(new SelectListItem
            {
                Selected = "2" == selectedmonth ? true : false,
                Text = "Feb",
                Value = "2"
            });


            monthlist.Add(new SelectListItem
            {
                Selected = "3" == selectedmonth ? true : false,
                Text = "Mars",
                Value = "3"
            });


            monthlist.Add(new SelectListItem
            {
                Selected = "4" == selectedmonth ? true : false,
                Text = "April",
                Value = "4"
            });

            monthlist.Add(new SelectListItem
            {
                Selected = "5" == selectedmonth ? true : false,
                Text = "Maj",
                Value = "5"
            });

            monthlist.Add(new SelectListItem
            {
                Selected = "6" == selectedmonth ? true : false,
                Text = "June",
                Value = "6"
            });

            monthlist.Add(new SelectListItem
            {
                Selected = "7" == selectedmonth ? true : false,
                Text = "July",
                Value = "7"
            });

            monthlist.Add(new SelectListItem
            {
                Selected = "8" == selectedmonth ? true : false,
                Text = "August",
                Value = "8"
            });

            return monthlist;
        }               



    }
}


<!DOCTYPE html>

<html lang="en">
    <head>
        <title></title>
    </head>

    <body>

            @Html.DropDownList("Year", (IEnumerable<SelectListItem>)ViewBag.YearList, new { id = "selectedyear" })

            @Html.DropDownList("Month", (IEnumerable<SelectListItem>)ViewBag.MonthList, new { id = "selectedmonth" })

    </body>
</html>

https://dotnetfiddle.net/Hg9CKn

Answer 1

您需要将DropDownLists放入表单中。请从Index方法中删除HttpGet属性，并在视图中使用以下代码：

<script src="http://code.jquery.com/jquery-1.8.2.min.js" type="text/javascript"></script>

<script type="text/javascript">
    $(document).ready(function() {
        $('#selectedyear').change(function() {
            window.frmYearMonth.submit();
        });
        $('#selectedmonth').change(function() {
            window.frmYearMonth.submit();
        });
    });
</script>



@using (Html.BeginForm("Index", "Home", FormMethod.Post, new { id = "frmYearMonth" }))
{
    ViewContext.Writer.Write(Html.DropDownList("Year", (IEnumerable<SelectListItem>)ViewBag.YearList, new { id = "selectedyear", }));
    ViewContext.Writer.Write(Html.DropDownList("Month", (IEnumerable<SelectListItem>)ViewBag.MonthList, new { id = "selectedmonth" }));
}

将值从两个下拉列表发送到actionresult

1 个答案: