下拉列表的"SelectedIndexChanged"事件未触发 [英] Dropdownlist`s "SelectedIndexChanged" event is not firing

问题描述

不会在运行时绑定数据的Dropdownlist的"SelectedIndexChanged"事件.

请解释一下可能是什么原因，并给我建议.

谢谢

K Uday

Hi,

"SelectedIndexChanged" event of Dropdownlist is not fired for which data is binded at runtime.

Please explain me what may be the reason, and advise me.

Thanks

K Uday

推荐答案

将该下拉列表的AutoPostBack property设置为true

Set AutoPostBack property to true for that dropdownlist

将下拉列表的数据绑定方法放入！Postback条件中
例如:

put the databinding method of dropdown inside !Postback condition
for ex:

Page_Load()
{
if(!IsPostBack)
{
   BindDropDown();
}
}

private void BindDropDown()
{
//Write the databinding logic
}

还要使下拉菜单的autopostback属性为true.

Also make autopostback property true for dropdown.

设置AutoPostBack="true" .

<asp:DropDownList ID="asp:DropDownList1" AutoPostBack="true" runat="server"  </asp:DropDownList>

这篇关于下拉列表的"SelectedIndexChanged"事件未触发的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！