我有一个场景,我必须根据选择的 下拉列表执行某些操作。通过mvc中的控制器启用html下拉列表
对于基本参考你可以使用国家,州,城市的例子。
我能够在当时填写国家列表,我已将其他两个下拉列表设置为 禁用。
国家填充后我想选择state.it正在填充。
两个问题
1)如何保持国家的状态DDL,因为它是回来了orisnal状态。 2)如何通过我的控制器启用下拉菜单。
MyView的代码
国家
<p>
<label>
State</label>
<%=Html.DropDownList("ddlState", ViewData["ddlState"] as SelectList, "--not selected--",new { onchange = "document.forms[0].submit()", disabled = "disabled" })%>
</p>
<p>
<label>
City</label>
<%=Html.DropDownList("ddlCities", ViewData["ddlCities"] as SelectList, "--not selected--", new { onchange = "document.forms[0].submit()", disabled = "disabled" })%>
</p>
我控制器代码
public ActionResult InsertData()
{
var customers = from c in objDetailEntity.Country
select new
{
c.Cid,
c.Cname
};
SelectList countriesList = new SelectList(customers.Take(100), "Cid", "Cname");
ViewData["ddlCountries"] = countriesList;
SelectList EmptyState = new SelectList(customers);
ViewData["ddlState"] = EmptyState;
ViewData["ddlCities"] = EmptyState;
Session["ddlSesCountry"] = countriesList;
return View();
}
//
// POST: /RegisTest/Create
[HttpPost]
public ActionResult InsertData(FormCollection collection)
{
try
{
CountryId = Convert.ToInt16(Request.Form["ddlCountries"]);
stateid = Convert.ToInt16(Request.Form["ddlState"]);
if (CountryId > 0 && stateid <= 0)
{
var stateslist = from c in objDetailEntity.State
where c.Country.Cid == CountryId
select new
{
c.Sid,
c.Sname
};
SelectList stateList = new SelectList(stateslist.Take(100), "Sid", "Sname");
ViewData["ddlState"] = stateList;
Session["StateList"] = stateList;
ViewData["ddlCities"] = stateList;
}
if (stateid > 0)
{
var citieslist = from c in objDetailEntity.City
where c.State.Sid == stateid
select new
{
c.Ctid,
c.Cityname
};
SelectList cityList = new SelectList(citieslist.Take(100), "Ctid", "Cityname");
ViewData["ddlCities"] = cityList;
ViewData["ddlState"] = Session["StateList"];
}
ViewData["ddlCountries"] = Session["ddlSesCountry"];
return View();
}
catch
{
return View();
}
}
你可以提供一些代码为1和2条件 – Ankur 2010-10-26 09:47:19