我有一个 json 对象,其中包含站点和站点的客户端。一个站点可以有多个客户端。
我知道如何使用敲除绑定填充站点下拉列表框(父级)。但是,当父下拉列表中发生 onchange 时,我无法弄清楚如何填充客户端下拉列表(子)。
如果有更多经验的人可以更改下面的代码以向我展示如何实现主/子下拉列表功能,我将不胜感激。
干杯
C
var posterArray = ([
{ SiteId: 1,
SiteName: "Mail",
ClientSite:[
{ ClientId: 1, ClientName: "Mail Client A" }, { ClientId: 1, ClientName: "Mail Client B"}]
},
{ SiteId: 2,
SiteName: "DSAC",
ClientSite:
{ ClientId: 1, ClientName: "DSAC Client A" }
}
]);
var ViewModel = function () {
var self = this;
// Poster
self.PosterList = ko.mapping.fromJS([]);
self.PosterListEnable = false;
self.refreshPosterList = function () {
var data = [];
if (posterArray.length == 0) {
data = [{ SiteId: 'No Posters', SiteName: 'No Posters'}];
} else if (posterArray.length == 1) {
data = posterArray;
} else {
data = [{ SiteId: 'Select a Poster', SiteName: 'Select a Poster'}];
data.push.apply(data, posterArray);
}
ko.mapping.fromJS(data, null, self.PosterList);
self.refreshClientList();
};
//Client
self.ClientList = ko.mapping.fromJS([]);
self.refreshClientList = function () {
};
};
var viewModel = new ViewModel();
$(function () {
ko.applyBindings(viewModel);
viewModel.refreshPosterList();
});
</script>
<fieldset class="SearchFilter">
<legend>Search Filter</legend>
<div class="SearchItem">
<span>Poster:</span>
<select id="dllPoster" data-bind="foreach: PosterList, disable:PosterList().length <= 1" onchange="viewModel.refreshClientList();">
<option data-bind="text: SiteName, attr:{value:SiteId}"></option>
</select>
<select id="ddlClient" data-bind="with: PosterList.ClientSite ">
<option data-bind="text: ClientName, attr:{value:ClientId}"></option>
</select>
</div>
</fieldset>