如何显示一个下拉列表在asp.net中的所有项目? [英] how to show all item of a dropdown list in asp.net?
问题描述
我想告诉所有的下拉列表中的的项目,因为它是开不点击向下箭头。你有什么建议吗?
I want to show all of the items of a dropdown list as it is opened without clicking the down arrow. Do you have any suggestions?
推荐答案
有很多方法可以做到这一点。
There's a lot of ways to do this.
最基本的方法如下:
<html>
<head>
<title>Example</title>
</head>
<body>
<div style="float:left; width:100%; height:30px;">
<select id="AutoDropdown" OnMouseOver="DoDropDown(this);" OnMouseOut="DoDropDown(this);">
<option>Test1</option>
<option>Test2</option>
<option>Test3</option>
<option>Test4</option>
</select>
</div>
<div>
<p>Here is some text that we hope the drop down list will appear over</p>
</div>
<script type="text/javascript">
function DoDropDown(objSel){
if(objSel.size > 1){
objSel.size = 1;
objSel.style.position='static';
}
else{
objSel.size = objSel.options.length;
objSel.style.position='absolute';
objSel.style.height='auto';
}
}
</script>
</body>
</html>
这模拟的效果,我认为你正在努力实现的,但看起来并不大。
This emulates the effect I think you are trying to achieve but doesn't look great.
您可以得到更好的效果通过模拟一个下拉列表 - 有大量的在网络上控制的替代品
You can get a better effect by emulating a drop down list - there are plenty of control alternatives on the web.
有一个Silverlight版本在这里:
There's a Silverlight version here:
HTTP://gallery.ex$p$pssion.microsoft.com/OpenComboBoxDropDown
还有各种控件,你可以在AJAX工具包适应:
There's also a variety of controls you could adapt in the AJAX toolkit:
http://www.asp.net/ajaxLibrary/AjaxControlToolkitSampleSite
我是pretty的肯定,你可以使双方的下拉列表和PopupControls出现在鼠标悬停事件。
I'm pretty sure you can make both the DropDown and PopupControls appear on a MouseOver event.
随着PopupControl,绑到一个文本框,当用户选择一个值,填充文本框。
With the PopupControl, tie it to a text box, and when the user selects a value, populate the text box.
一些第三方控件(如Telerik的)也支持这种风格。
Some of the third party controls (like Telerik's) also support this style.
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