重写dropdownlist，编写自定义dropdownlist 控件 ，改变其下拉框的宽度。该怎么处理
日期：2014-05-18 浏览次数：20410 次
重写dropdownlist，编写自定义dropdownlist 控件 ，改变其下拉框的宽度。。
求设计的思路 成品代码也行，望大侠帮忙！！
------解决方案--------------------
OnRender中设定this.Attribute["width"]=...
------解决方案--------------------
textbox + button + listbox(隐藏DIV层中),挺难的有同事做过
------解决方案--------------------
dropdownlist 控件已经被封装好了,不好进行修改了吧,可以用div模拟一个dropdownlist写成控件.
------解决方案--------------------
可参考DNT中Discuz.Control自定义的dropdownlist写法
继承System.Web.UI.WebControls.DropDownList,IPostBackDataHandler
------解决方案--------------------
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head><title>
无标题页
</title>
<style type="text/css">
<!--
body
{
margin: 0px;
padding: 30px 0px 0px 30px;
background-color: #CFDFEF;
font-size: 12px;
}
.selectA
{
width: 92px;
height: 17px;
padding-left: 10px;
padding-top: 5px;
background-image: url(http://labs.utombox.com/select2css/tm2008-select.gif);
overflow: hidden;
cursor: pointer;
}
.selectB
{
display: none;
width: 81px;
height: auto;
background-image: url(http://labs.utombox.com/select2css/tm2008-select.gif);
background-position: -102px 0px;
border-bottom: 1px solid #4EA0D1;
}
.selectB .item
{
width: 71px;
height: 17px;
background-image: url(http://labs.utombox.com/select2css/tm2008-select.gif);
background-position: -102px 0px;
padding-left: 10px;
padding-top: 5px;
overflow: hidden;
cursor: pointer;
}
-->
</style>
<script type="text/javascript">
<!--
//val
var items = null;
var selectA = null;
var selectB = null;
var selectAClicked = false;
//method
function $(s)
{
return document.getElementById(s);
}
window.onload = function()
{
items = [$("itemA"),$("itemB"),$("itemC"),$("itemD"),$("itemE"),$("itemF"),$("itemG"),$("itemH")];
selectA = $("selectA");
selectB = $("selectB");
//init
items[0].style.backgroundPosition = "0px -66px";
//selectA event
selectA.onmouseover = function()
{
if(selectAClicked)
return;
this.style.backgroundPosition = "0px -22px";
}
selectA.onmouseout = function()
{
if(selectAClicked)
return;
this.style.backgroundPosition = "0px 0px";
}
selectA.onclick = function()
{
if(selectAClicked)
{
selectAClicked = false;
this.style.backgroundPosition = "0px -22px";
selectB.style.display = "none";
return;
}
selectAClicked = true;
this.style.backgroundPosition = "0px -44px";
selectB.style.display = "block";
}
//selectB event
//none
//items event
function itemMouseOver()
{
this.style.backgroundPosition = "0px -88px";
}
求设计的思路 成品代码也行，望大侠帮忙！！
------解决方案--------------------
OnRender中设定this.Attribute["width"]=...
------解决方案--------------------
textbox + button + listbox(隐藏DIV层中),挺难的有同事做过
------解决方案--------------------
dropdownlist 控件已经被封装好了,不好进行修改了吧,可以用div模拟一个dropdownlist写成控件.
------解决方案--------------------
可参考DNT中Discuz.Control自定义的dropdownlist写法
继承System.Web.UI.WebControls.DropDownList,IPostBackDataHandler
------解决方案--------------------
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head><title>
无标题页
</title>
<style type="text/css">
<!--
body
{
margin: 0px;
padding: 30px 0px 0px 30px;
background-color: #CFDFEF;
font-size: 12px;
}
.selectA
{
width: 92px;
height: 17px;
padding-left: 10px;
padding-top: 5px;
background-image: url(http://labs.utombox.com/select2css/tm2008-select.gif);
overflow: hidden;
cursor: pointer;
}
.selectB
{
display: none;
width: 81px;
height: auto;
background-image: url(http://labs.utombox.com/select2css/tm2008-select.gif);
background-position: -102px 0px;
border-bottom: 1px solid #4EA0D1;
}
.selectB .item
{
width: 71px;
height: 17px;
background-image: url(http://labs.utombox.com/select2css/tm2008-select.gif);
background-position: -102px 0px;
padding-left: 10px;
padding-top: 5px;
overflow: hidden;
cursor: pointer;
}
-->
</style>
<script type="text/javascript">
<!--
//val
var items = null;
var selectA = null;
var selectB = null;
var selectAClicked = false;
//method
function $(s)
{
return document.getElementById(s);
}
window.onload = function()
{
items = [$("itemA"),$("itemB"),$("itemC"),$("itemD"),$("itemE"),$("itemF"),$("itemG"),$("itemH")];
selectA = $("selectA");
selectB = $("selectB");
//init
items[0].style.backgroundPosition = "0px -66px";
//selectA event
selectA.onmouseover = function()
{
if(selectAClicked)
return;
this.style.backgroundPosition = "0px -22px";
}
selectA.onmouseout = function()
{
if(selectAClicked)
return;
this.style.backgroundPosition = "0px 0px";
}
selectA.onclick = function()
{
if(selectAClicked)
{
selectAClicked = false;
this.style.backgroundPosition = "0px -22px";
selectB.style.display = "none";
return;
}
selectAClicked = true;
this.style.backgroundPosition = "0px -44px";
selectB.style.display = "block";
}
//selectB event
//none
//items event
function itemMouseOver()
{
this.style.backgroundPosition = "0px -88px";
}
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