Dropdownlist SelectedIndexChanged在每次回发时触发 [英] Dropdownlist SelectedIndexChanged firing on every postback

问题描述

我动态添加自定义用户控件（添加更多功能）给占位符

我的用户控件包含四个下拉列表控件。用户控件的第一个实例工作正常



问题是添加了另一个用户控件和dropdownselectedIndexchaged所有dropdwon文本都被重置

I am dynamically adding a custom user control(add More Functionality ) to an place holder
My user control contains four dropdownlist controls .first instance of the user control work fine

problem was adding another user control and dropdownselectedIndexchaged all the dropdwon text are reset

推荐答案

在页面加载中添加以下语句

in page load add following statement

if(!postback)
{
   // bind your drop down lists here
}

希望这可能帮你 ！！ ：）

hope this might help you !! :)

为下拉列表添加触发器，以避免在每次回发时触发选定的索引更改

Add trigger for dropdownlist for avoiding selected index change firing on every postback

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