Is possible : javascript extract value from c:forEach tag?
i have populate some values using c:forEach tag. I want to get those values in my javascript.
If I click GetCtag value button, then i want to read from (c:forEach) values in javascript.
Is any other-way to retrieve the c:forEach tag value
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
<%@ taglib uri="http://richfaces.org/a4j" prefix="a4j"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<f:view>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<script type="text/javascript">
function getCTagValue(ctagObject)
{
alert("CFor Each Tag Object Value: " + ctagObject);
// Here i want write code for retrieve the c:forEach tag value
}
</s开发者_运维问答cript>
</head>
<body>
<h:form id="cTagForm" >
<c:forEach items="${cTagBean.tagList}" var="ctag">
<c:out value="${ctag.name} : "/>
<c:out value="${ctag.age}"/></br>
</c:forEach>
<a4j:commandButton id="GetCtagId" value="GetCtag" oncomplete="getCTagValue('#{cTagBean.tagList}')"/>
</h:form>
</body>
</html>
Help me. Thanks in advance.
Just print it in JavaScript syntax instead of HTML syntax.
<script>
var data = {
<c:forEach items="${cTagBean.tagList}" var="ctag" varStatus="loop">
'${ctag.name}': ${ctag.age}${!loop.last ? ',' : ''}
</c:forEach>
};
</script>
So that it end up as valid JavaScript object (assuming that name returns String and age returns Number):
<script>
var data = {
'foo': 10,
'bar': 5,
'waa': 20
};
</script>
It is only possible for JavaScript to access the data in the HTML as it is SEEN BY THE BROWSER.
The method I would recommend is to generate JSON (however your Web-API allows that) and store it in JavaScript code -- perhaps a global. Of course, keeping this data "closer" to where it is used is advisable, but the same holds. Another approach is to use custom HTML attributes (hopefully starting with "data-" for HTML5-compliance).
I got the solution.
<a4j:commandButton id="GetCtagId"
value="GetCtag"
data="#{cTagBean.tagList}"
oncomplete="getCTagValue(data)"/>
Then,
function getCTagValue(data)
{
for(var i=0; i<data.length; i++)
{
alert("Month : " + data[i].name);
alert("Value : " + data[i].age);
}
}
<script>
var data = new Array();
<c:forEach items="${cTagBean.tagList}" var="ctag" varStatus="loop">
data.push(${ctag.name});
</c:forEach>
</script>
加载中,请稍侯......
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