ASP.net下拉帮助 [英] ASP.net Dropdown Help

问题描述

我的aspx页面有一个下拉列表

我想在其上触发一个事件，以便如果其选择的索引为0，那么它将显示一个文本框

我想通过JavaScript做到这一点

I have a drop down in my aspx page

I want to trigger an event on it so that if its selected index is 0 then it shows a textbox

I want to do this through JavaScript

function do_Post(){
if(document.form1.dropdown.value!=0)
{
document.form1.submit();
}
}

如何使用JS在aspx中执行此操作?

我应该用什么代替document.form1.dropdown? document.getElementbyID?

How can i do this in aspx using JS??

what should i use instead of document.form1.dropdown? document.getElementbyID?? and how can i call it on aspx file??

推荐答案

Chris的这篇文章对如何做到这一点有一个非常简单明了的答案.
使用JavaScript处理下拉列表选择 [

This article by Chris has a very simple and clear answer on how to do this.

Using JavaScript to handle drop-down list selections[^]

示例2 [

Example 1[^]


Example 2[^]

http://msdn.microsoft.com/en-us/library/aa479302 .aspx [^ ]

这篇关于ASP.net下拉帮助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！