在Google可视化表格(Google Visualization API)中统计过滤后的行数,可以通过以下步骤实现:
首先,确保你已经在HTML页面中引入了Google可视化API的脚本,并且创建了一个数据表(DataTable)。
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
<script type="text/javascript">
google.charts.load('current', {'packages':['table']});
google.charts.setOnLoadCallback(drawTable);
function drawTable() {
var data = new google.visualization.DataTable();
data.addColumn('string', 'Name');
data.addColumn('number', 'Age');
data.addRows([
['Alice', 30],
['Bob', 25],
['Charlie', 35],
['David', 28]
]);
var table = new google.visualization.Table(document.getElementById('table_div'));
table.draw(data, {showRowNumber: true});
}
</script>
</head>
<body>
<div id="table_div"></div>
</body>
</html>
接下来,添加一个过滤器来筛选数据表中的行。
function drawTable() {
var data = new google.visualization.DataTable();
data.addColumn('string', 'Name');
data.addColumn('number', 'Age');
data.addRows([
['Alice', 30],
['Bob', 25],
['Charlie', 35],
['David', 28]
]);
var filter = new google.visualization.ControlWrapper({
'controlType': 'NumberRangeFilter',
'containerId': 'filter_div',
'options': {
'filterColumnLabel': 'Age',
'ui': {'labelStacking': 'vertical'}
}
});
var table = new google.visualization.ChartWrapper({
'chartType': 'Table',
'containerId': 'table_div',
'options': {'showRowNumber': true}
});
var dashboard = new google.visualization.Dashboard(document.getElementById('dashboard_div'));
dashboard.bind(filter, table);
dashboard.draw(data);
}
在HTML中添加过滤器容器:
<div id="dashboard_div">
<div id="filter_div"></div>
<div id="table_div"></div>
</div>
最后,添加一个函数来统计过滤后的行数,并在页面上显示结果。
function drawTable() {
var data = new google.visualization.DataTable();
data.addColumn('string', 'Name');
data.addColumn('number', 'Age');
data.addRows([
['Alice', 30],
['Bob', 25],
['Charlie', 35],
['David', 28]
]);
var filter = new google.visualization.ControlWrapper({
'controlType': 'NumberRangeFilter',
'containerId': 'filter_div',
'options': {
'filterColumnLabel': 'Age',
'ui': {'labelStacking': 'vertical'}
}
});
var table = new google.visualization.ChartWrapper({
'chartType': 'Table',
'containerId': 'table_div',
'options': {'showRowNumber': true}
});
var dashboard = new google.visualization.Dashboard(document.getElementById('dashboard_div'));
dashboard.bind(filter, table);
dashboard.draw(data);
// 统计过滤后的行数
google.visualization.events.addListener(dashboard, 'ready', function() {
var filteredRows = table.getDataTable().getNumberOfRows();
document.getElementById('row_count').innerText = 'Filtered Rows: ' + filteredRows;
});
}
在HTML中添加显示行数的元素:
<div id="dashboard_div">
<div id="filter_div"></div>
<div id="table_div"></div>
</div>
<div id="row_count"></div>
这样,当你在过滤器中选择不同的范围时,页面上的“Filtered Rows”将会实时更新显示过滤后的行数。
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