<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<script language="JavaScript">
<!--
function addSrcToDestList() {
destList = window.document.forms[0].destList;
srcList = window.document.forms[0].srcList;
var len = destList.length;
for(var i = 0; i < srcList.length; i++) {
if ((srcList.options[i] != null) && (srcList.options[i].selected)) {var found = false;
for(var count = 0; count < len; count++) {
if (destList.options[count] != null) {
if (srcList.options[i].text == destList.options[count].text) {
found = true;
break;
}
}
}
if (found != true) {
destList.options[len] = new Option(srcList.options[i].text);
len++;
}
}
}
}function deleteFromDestList() {
var destList = window.document.forms[0].destList;
var len = destList.options.length;
for(var i = (len-1); i >= 0; i--) {
if ((destList.options[i] != null) && (destList.options[i].selected == true)) {
destList.options[i] = null;
}
}
}
// -->
</SCRIPT>
</head>
<body>
<center>
<form method="POST">
<table bgcolor="#FFFFCC"><tr>
<td bgcolor="#FFFFCC" width="85">
<select size="6" name="srcList" multiple>
<option value="1">Item 1
<option value="2">Item 2
<option value="3">Item 3
<option value="4">Item 4
<option value="5">Item 5
<option value="6">Item 6
</select>
</td>
<td bgcolor="#FFFFCC" width="74" align="center">
<input type="button" value=" 增加到右边 " onClick="javascript:addSrcToDestList()">
<br><br>
<input type="button" value=" 从右边删除 " onclick="javascript:deleteFromDestList();">
</td>
<td bgcolor="#FFFFCC" width="69">
<select size="6" name="destList" multiple>
</select>
</td>
</tr>
</table>
</form>
</body>
</html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<script language="JavaScript">
<!--
function addSrcToDestList() {
destList = window.document.forms[0].destList;
srcList = window.document.forms[0].srcList;
var len = destList.length;
for(var i = 0; i < srcList.length; i++) {
if ((srcList.options[i] != null) && (srcList.options[i].selected)) {var found = false;
for(var count = 0; count < len; count++) {
if (destList.options[count] != null) {
if (srcList.options[i].text == destList.options[count].text) {
found = true;
break;
}
}
}
if (found != true) {
destList.options[len] = new Option(srcList.options[i].text);
len++;
}
}
}
}function deleteFromDestList() {
var destList = window.document.forms[0].destList;
var len = destList.options.length;
for(var i = (len-1); i >= 0; i--) {
if ((destList.options[i] != null) && (destList.options[i].selected == true)) {
destList.options[i] = null;
}
}
}
// -->
</SCRIPT>
</head>
<body>
<center>
<form method="POST">
<table bgcolor="#FFFFCC"><tr>
<td bgcolor="#FFFFCC" width="85">
<select size="6" name="srcList" multiple>
<option value="1">Item 1
<option value="2">Item 2
<option value="3">Item 3
<option value="4">Item 4
<option value="5">Item 5
<option value="6">Item 6
</select>
</td>
<td bgcolor="#FFFFCC" width="74" align="center">
<input type="button" value=" 增加到右边 " onClick="javascript:addSrcToDestList()">
<br><br>
<input type="button" value=" 从右边删除 " onclick="javascript:deleteFromDestList();">
</td>
<td bgcolor="#FFFFCC" width="69">
<select size="6" name="destList" multiple>
</select>
</td>
</tr>
</table>
</form>
</body>
</html>
我在做联动下拉框的时候也遇到过同样的问题,估计是.net的bug。
后来我设置了一个<input type=hidden>,添加一个onchange时间用来把值放在里面,这时候后台就可以取到值了,你也可以参考一下,试试其它控件来存值,然后隐藏。
<asp:listbox id="most_exit_products2" runat="server" Width="165px" Rows="10" onchange="javascript:addit();">函数addit()
function addit()
{
most.value=most_exit_products2.options[0].text;
}然后在后台我想取到most.value值如下string cc=most.Value;
Response.Write(cc);
Response.End();但是cc却是空!!还是取不到啊?
怎么回事?
大家可以到网上找找看,我是在www.asp.net的控件谷里面找到的
private void Page_Load( object sender , System.EventArgs e )
{
................
most_exit_products2.Attirbutes.Add("onclick","addit();");
................
}
http://www.metabuilders.com/Tools/DualList.aspx这个控件完全实现你的功能。
用你的方法仍然是不行的。
SmartNavigation=true;搞定!