固定下拉列表中的第零个索引[asp.net] [英] fixed zeroth index in dropdown [asp.net]

问题描述

i want 2 show dropdown on my web page with zero index fixed [select option]
as soon as user select items from a dropdown i want to do some code behind
on that index but dropdown zeroth index should remain intact

how can i achieve this?

推荐答案

您是否将下拉列表绑定在pagepostback中??

当您不使用以下代码在页面回发中将值绑定到下拉列表时，就会发生这种情况

if(！ispostback)
{
您用于binind dropdowndata的代码
}

are you bind the dropdown in the pagepostback???

It happens when you not bind values to dropdown in page postback use following code

if(!ispostback)
{
your code for binind the dropdowndata
}

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