重新设置元素后刷新下拉列表
问题描述:
我有一个asp.net mvc 2应用程序,并且有一些jQuery定义了两个下拉列表的行为。当一个改变时,另一个填充过滤的数据。经过大量的讨论,我有jquery的工作,通过萤火虫调试确认,但我的下拉列表并不令人耳目一新。这是jQuery的重新设置元素后刷新下拉列表
<script type="text/javascript">
$(function() {
$('#cid').change(function() {
var coid = $(this).val();
$.post("/TimeTracking/FilterFieldOffices", { companyId: coid }, function (data) {
$("#foid").loadSelect(data);
});
});
});
$(function() {
$.fn.loadSelect = function (data) {
return this.each(function() {
this.options.length = 0;
$.each(data, function (index, itemData) {
var option = new Option(itemData.Text, itemData.Value);
this.add(option);
});
});
};
});
</script>
这里是我的控制器行动
public ActionResult FilterFieldOffices(int companyId = 0)
{
IList<FieldOffice> list = _fodp.GetFieldOfficesForCompany(companyId);
var returnList = new SelectList(list, "Id", "FacilityName");
return Json(returnList);
}
所以,我知道,下拉列表中填充有正确的数据,但视图页面上的下拉列表是不爽快。我对JQuery的知识有限,所以如果我缺少像温柔一样的东西。因为在内部它不再指向select
元素
$(function() {
$.fn.loadSelect = function (data) {
return this.each(function() {
this.options.length = 0;
var select = this;
$.each(data, function (index, itemData) {
var option = new Option(itemData.Text, itemData.Value);
$(select).append(option);
});
});
};
});
请注意,我们需要捕获this
外的foreach:
答
试试这个。
全部工作示例:
型号:
public class Item
{
public int Value { get; set; }
public string Text { get; set; }
}
public class MyViewModel
{
public int? SelectedCompanyId { get; set; }
public int? SelectedFieldOfficeId { get; set; }
public IEnumerable<Item> Companies { get; set; }
public IEnumerable<Item> FieldOffices { get; set; }
}
控制器:
[HandleError]
public class HomeController : Controller
{
public ActionResult Index()
{
var model = new MyViewModel
{
Companies = Enumerable.Range(1, 5).Select(i => new Item
{
Value = i,
Text = "Company " + i
}),
FieldOffices = Enumerable.Empty<Item>()
};
return View(model);
}
public ActionResult FilterFieldOffices(int companyId)
{
return Json(Enumerable.Range(1, 3).Select(i => new Item
{
Value = i,
Text = "Field offfice " + i
}));
}
}
查看:
<script type="text/javascript" src="<%= Url.Content("~/scripts/jquery-1.4.1.js") %>"></script>
<script type="text/javascript">
$(function() {
$('#cid').change(function() {
var coid = $(this).val();
$.post('<%= Url.Action("FilterFieldOffices") %>', { companyId: coid }, function (data) {
$('#foid').loadSelect(data);
});
});
});
$(function() {
$.fn.loadSelect = function (data) {
return this.each(function() {
this.options.length = 0;
var select = this;
$.each(data, function (index, itemData) {
var option = new Option(itemData.Text, itemData.Value);
$(select).append(option);
});
});
};
});
</script>
<% using (Html.BeginForm()) { %>
<%: Html.DropDownListFor(x => x.SelectedCompanyId, new SelectList(Model.Companies, "Value", "Text"), new { id = "cid" })%>
<%: Html.DropDownListFor(x => x.SelectedFieldOfficeId, new SelectList(Model.FieldOffices, "Value", "Text"), new { id = "foid" })%>
<input type="submit" value="OK" />
<% } %>
BOOYEA!一直在努力做几个星期,现在终于可以解决了!谢谢! – 2010-10-19 15:23:29