隐藏所选索引更改下拉列表的服务器控件 [英] Hide a server control on selected index change of dropdown
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问题描述
大家好，
我想使用java脚本相应地选择下拉值来更改服务器控件的可见性。
请帮帮我..
Hi All,
I want to change visibility of a server control on selection of dropdown value accordingly using java script.
Please help me..
推荐答案
您好b $ b
试试这个代码示例....
Hi
Try this code sample....
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script type="text/javascript">
var change = function (ddl) {
var value = ddl.value;
var btn = document.getElementById('btn');
var chk = document.getElementById('chk');
var lbl = document.getElementById('lbl');
var rdb = document.getElementById('rdb');
if (value == 'button')
btn.style.visibility = 'hidden';
if (value == 'checkbox')
chk.style.visibility = 'hidden';
if (value == 'label')
lbl.style.visibility = 'hidden';
if (value == 'radiobutton')
rdb.style.visibility = 'hidden';
if (value == 'All') {
btn.style.visibility = 'visible';
chk.style.visibility = 'visible';
lbl.style.visibility = 'visible';
rdb.style.visibility = 'visible';
}
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
visibility ::
<asp:DropDownList onchange="change(this)" ID="ddl" runat="server">
<asp:ListItem Text="All" />
<asp:ListItem Text="button" />
<asp:ListItem Text="checkbox" />
<asp:ListItem Text="label" />
<asp:ListItem Text="radiobutton" />
</asp:DropDownList>
<br />
<br />
<asp:CheckBox ID="chk" runat="server" Text="" /><br />
<br />
<asp:Button ID="btn" runat="server" Text="button" /><br />
<br />
<asp:Label ID="lbl" runat="server" Text="label" /><br />
<br />
<asp:RadioButton ID="rdb" runat="server" Text="" />
<br />
</div>
</form>
</body>
</html>
在页面加载时将此代码写入.cs文件
ddlName.Attributes。添加（onchange，HideSearchResults（）;）;
javascript代码：
Write this code in .cs file on page load
ddlName.Attributes.Add("onchange", "HideSearchResults();");
javascript code :
function HideSearchResults()
{
//write your code here base on codition hide the sercer controls
//eg.
（'。myControl'）。hide（）;
}
('.myControl').hide(); }
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