我需要通过动态数据创建图表。
<script type="text/javascript" language="javascript">
// Step 1
// On window load get data using ajax
window.onload = function () {
getAjaxData();
}
// Step 2
// After getting data, call the chart function and pass data
function getAjaxData() {
var values;
$.ajax({
cache : false,
type : "GET",
url : 'chartvalues',
format:'json',
success: function(values) {
onLoadDoc(values);
}
});
}
// Step 3
// Process your chart using the passed data
function onLoadDoc(values) {
var chart1;
chart1 = new cfx.Chart();chart1.getAnimations().getLoad().setEnabled(true);
var axisY = chart1.getAxisY();
axisY.setMin(0);
axisY.setMax(30);
//----Assign data fields--------
var fields = chart1.getDataSourceSettings().getFields();
var field1 = new cfx.FieldMap();
field1.setName("Value");
field1.setUsage(cfx.FieldUsage.Value);
fields.add(field1);
var field2 = new cfx.FieldMap();
field2.setName("Date");
field2.setUsage(cfx.FieldUsage.XValue);
fields.add(field2);
chart1.setGallery(cfx.Gallery.Bar);
//----Set Sample Data------------
var items = values;
alert (items);
chart1.setDataSource(items);
chart1.getView3D().setEnabled(true);
var chartDiv = document.getElementById('ChartDiv1');
chart1.create(chartDiv);
}
</script>
在变量项目中,我得到 json 格式的值,例如:
[
{ "Date": "2012-01-21T23:45:10.280Z", "Value": 15 },
{ "Date": "2012-02-10T23:45:10.280Z", "Value": 12 },
]
但是图表不显示?我需要做什么?