我在視圖中有三個DDL。我在第一個DDL的'onchange'上啓動了一個javascript函數來填充第二個,第二個填充第三個。工作正常。MVC Dropdownlist Cascade - 如何在第一個ddl選擇更改時觸發第三個ddl上的事件?
問題是,當第一個DDL設置爲未選中,即「Select a Value」時,第二個DDL被觸發並將自己設置爲「Select a Value」,但第二個DDL的onchange事件不會觸發,所以第三個DDL仍然使用它從先前選擇中獲得的數據填充。
如何獲得第二個DDL來觸發我可以用來刷新第三個DDL的事件?還是有另一種方式?下面
代碼:
@{
ViewBag.Title = "CascadingList";
Layout = "~/Views/Shared/_Layout.cshtml";
}
@{Html.EnableUnobtrusiveJavaScript(true);}
<script type="text/javascript">
$(document).ready(function() {
getMarket();
});
function getMarket() {
var url = '@Url.Content("~/Strategies/MarketList")/';
$.getJSON(url, function (data) {
var items = "<option>Select a Market</option>";
$.each(data, function (i, market) {
if (market.Value.indexOf("\'") > -1) {
s = market.Value + " " + market.Text;
alert(s + ": Market.Value cannot contain \'")
}
items += "<option value='" + market.Value + "'>" + market.Text + " </option>";
});
$('#MarketsID').html(items);
});
}
function getShareType() {
var url = '@Url.Content("~/Strategies/ShareTypeList")/' + $('#MarketsID').val();
$.getJSON(url, function (data) {
var items = '<option>Select an Asset Type</option>';
$.each(data, function (i, shareType) {
items += "<option value='" + shareType.Value + "'>" + shareType.Text + " </option>";
});
$('#ShareTypesID').html(items);
});
}
function getShare() {
var url = '@Url.Content("~/Strategies/ShareList")/' + $('#MarketsID').val() + '|' + $('#ShareTypesID').val();
$.getJSON(url, function (data) {
var items = '<option>Select a Share</option>';
$.each(data, function (i, share) {
items += "<option value='" + share.Value + "'>" + share.Text + "</option>";
});
$('#SharesID').html(items);
});
}
</script>
<h2>Strategy</h2>
<div id="MarketsDivID">
<label for="Markets">Markets</label>
<select id="MarketsID" name="Markets" onchange="getShareType()"></select>
</div>
<div id="ShareTypesDivID">
<label for="ShareTypes">ShareTypes</label>
<select id="ShareTypesID" name="ShareTypes" onchange="getShare()" ></select>
</div>
<div id="SharesDivID">
<label for="Shares">Shares</label>
<select id="SharesID" name="Shares" ></select>
</div>