如何在Asp.Net MVC 4中绑定Drpdownlist [英] How to Bind Drpdownlist's in Asp.Net MVC 4

问题描述

嗨朋友



我想在asp.net MVC中绑定下拉列表



我有2个下拉列表1是国家1是状态我想要使用我想绑定的实体框架工作绑定这2个下拉列表。



选择国家后我想绑定状态名称下拉列表请帮我在Asp.net MVC4上如何做到这一点..





谢谢：

Ajay

Hi Friends

I want to bind dropdownlist in asp.net MVC

I have 2 dropdowns one is country 1 is State I want to Bind this 2 dropdowns using Entity Frame work i want to bind.

After Selecting Country i want to bind state Names Dropdownlist please help me how to do this on Asp.net MVC4..


Thanks :
Ajay

推荐答案

请检查相同的网址



http://www.a2zmenu.com/Blogs/MVC/How-to-fill-DropdownList-control-and-SelectedIndexChanged-event-in-MVC.aspx

Please check on same url

http://www.a2zmenu.com/Blogs/MVC/How-to-fill-DropdownList-control-and-SelectedIndexChanged-event-in-MVC.aspx

@{
 ViewBag.Title = "Main";
}
<script type="text/javascript" src="../../Scripts/jquery-1.7.1.min.js"></script>
<script type="text/javascript">
    function GetState() { 
    var selectedValue =

（'＃ddlCountry'）。val（）;
window.location.href ='/ Bind / GetStatesByID /？countryCode ='+ selectedValue;
}
< / script>
< h2> Main< / h2>
@using（Html.BeginForm（））
{

@ Html.DropDownList（Country，（SelectList）ViewBag.countryList， - 选择你的国家 - ，new {id =ddlCountry， onchange =GetState（）;}）
@ Html.DropDownList（State，（SelectList）ViewBag.stateList， - 选择你的州 - ，新{id =ddlState}）
}

('#ddlCountry').val(); window.location.href = '/Bind/GetStatesByID/?countryCode=' + selectedValue; } </script> <h2>Main</h2> @using (Html.BeginForm()) { @Html.DropDownList("Country", (SelectList)ViewBag.countryList, "--Choose Your Country--", new { id = "ddlCountry",onchange="GetState();" }) @Html.DropDownList("State", (SelectList)ViewBag.stateList, "--Choose Your State--", new { id = "ddlState" }) }

public class BindController : Controller
   {
       //
       // GET: /Bind/

       public ActionResult Index()
       {
           ViewBag.countryList = GetAllCountrys();
           ViewBag.stateList = GetAllStates();
          return View("Main");
       }
       public ActionResult GetStatesByID(int? countryCode)
       {
           ViewBag.stateList = GetAllStatsByID(countryCode);
           ViewBag.countryList = new SelectList(GetAllCountrys(), "Value", "Text", countryCode);
           return View("Main");
       }

       private SelectList GetAllStatsByID(int? countryCode)
       {
           Data.TestEntities entity = new Data.TestEntities();
           {
               IEnumerable<SelectListItem> selectedStates = entity.States.Where(s => s.CountryID == countryCode).AsEnumerable().Select(m => new SelectListItem()
               {
                   Text = m.StateName
                   ,
                   Value = m.StateID.ToString()
               });
               return new SelectList(selectedStates, "Value", "Text", "--Select State--");
           }
       }
       private SelectList GetAllCountrys()
       {
           Data.TestEntities entity = new Data.TestEntities();
           {
               IEnumerable<SelectListItem> country = entity.Countries.AsEnumerable().Select(m => new SelectListItem()
               {
                   Text = m.CountryName
                   ,
                   Value = m.CountryID.ToString()
               });
               return new SelectList(country, "Value", "Text","--Select Country--");
           }

       }

       private SelectList GetAllStates()
       {
           Data.TestEntities entity = new Data.TestEntities();
           {
               IEnumerable<SelectListItem> states = entity.States.AsEnumerable().Select(m => new SelectListItem()
               {
                   Text = m.StateName
                   ,
                   Value = m.StateID.ToString()
               });
               return new SelectList(states, "Value", "Text", "--Select States--");
           }
       }
   }

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