如何在不回发的情况下触发dropdownlist的SelectedIndexChanged？ [英] How to fire dropdownlist's SelectedIndexChanged without postback?

问题描述

我的数据绑定到数据库中的查询页面上有一个DropDownList（数据绑定仅在.aspx文件中设置，而在后台代码中未设置）。在它旁边，我有第二个DDL，该DDL从第一个的SelectedIndexChanged函数填充。这有效，但仅当AutoPostback设置为true时。

I've got a DropDownList on my page databound to a query from my database (Databinding is set up only in my .aspx file, not in codebehind). Next to it I have a second DDL that gets populated from the SelectedIndexChanged function of the first one. This works, but only when AutoPostback is set to true.

是否有一种方法可以触发SelectedIndexChanged事件或在我的代码背后手动调用此函数，而不必每次都重新加载页面？

Is there a way to fire the SelectedIndexChanged event or manually call this function in my codebehind without having to reload the page every time?

推荐答案

我会将DDL放在AJAX UpdatePanel 内，因此它只会更新页面的那部分而不是整页重新加载。

I would put the DDLs inside an AJAX UpdatePanel so it only updates that part of the page instead of a full page reload.

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