[英]Having trouble calling aspx.cs method
My aspx page contains a drop down mwnu with some values. 我的aspx页面包含带有某些值的下拉mwnu。 I would like to call my
loadInstances()
method in the related aspx.cs page when a change is detected in the drop down. 当下拉列表中检测到更改时,我想在相关的
loadInstances()
页面中调用我的loadInstances()
方法。 I've got an event listener attached to the menu like this: 我将事件侦听器附加到菜单上,如下所示:
$("#ContentPlaceHolder1_DropDownListCounter").change(function () {
console.log("I've been hit!");
<%loadInstances();%>;
});
My aspx.cs method looks like this: 我的aspx.cs方法看起来像这样:
public void loadInstances()
{
foreach (string dataInfo in DataHelper.getInfo())
{
ListItem item = new ListItem(dataInfo, dataInfo);
ListBoxData.Items.Add(item);
}
}
Where ListBoxData
is a ListBox in my aspx page which I would like to be populated on change of the dropdown. 其中
ListBoxData
是我的aspx页面中的一个ListBox,我希望在下拉列表的更改中填充它。 I can confirm that the event listener is working as I've got the "I've been hit!" 我可以确认事件监听器正在运行,因为我已经收到“我被击中了!”的消息。 appearing in my console.
出现在我的控制台中。 However the
loadInstances()
method isn't being called. 但是,未调用
loadInstances()
方法。 Have I missing a step to call my aspx.cs method from my aspx page? 我是否缺少从aspx页面调用aspx.cs方法的步骤?
Please modify your code like this:- 请像这样修改您的代码:-
$("#<%=DropDownListCounter.ClientID%>").change(function () {
console.log("I've been hit!");
"<%=loadInstances()%>";
});
But the operation you are doing for that you need to add AutoPostBack="true"
in DropDownList
then this script will work. 但是您要执行的操作是需要在
DropDownList
添加AutoPostBack="true"
,然后此脚本才能工作。 if you don't want AutoPostBack
you can use Ajax
or UpdatePanel
如果您不希望使用
AutoPostBack
,则可以使用Ajax
或UpdatePanel
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