我正在尝试制作一个Google图表,用于从网页上的隐藏字段中提取数据。
如果我直接通过data.addRows添加数据,它可以正常工作:
google.charts.load('current', {packages: ['corechart', 'line']});
google.charts.setOnLoadCallback(drawChart);
function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn('date', 'Date');
data.addColumn('number', 'Rainfall');
data.addRows([[new Date(2000, 8, 5), 56], [new Date(2000, 8, 6), 22], [new Date(2000, 8, 7), 44], [new Date(2000, 8, 8), 40], [new Date(2000, 8, 9), 62]]);
var options = {
title: 'Rainfall'
};
var chart = new google.visualization.LineChart(document.getElementById('chart_div'));
chart.draw(data, options);
}
但是,如果我尝试创建一个包含该数组的字符串,然后使用addRows添加它,则它不起作用:
google.charts.load('current', {packages: ['corechart', 'line']});
google.charts.setOnLoadCallback(drawChart);
function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn('date', 'Date');
data.addColumn('number', 'Rainfall');
var myData = "[[new Date(2000, 8, 5), 56], [new Date(2000, 8, 6), 22], [new Date(2000, 8, 7), 44], [new Date(2000, 8, 8), 40], [new Date(2000, 8, 9), 62]]"
data.addRows(myData);
var options = {
title: 'Rainfall'
};
var chart = new google.visualization.LineChart(document.getElementById('chart_div'));
chart.draw(data, options);
}
如何将字符串中的数据添加到DataTable?
JSFiddle:https://jsfiddle.net/oo5w6ghf/4/
答案 0 :(得分:1)
想出来 - 我需要在字符串中添加“eval”:
var myData = eval("[[new Date(2000, 8, 5), 56], [new Date(2000, 8, 6), 22], [new Date(2000, 8, 7), 44], [new Date(2000, 8, 8), 40], [new Date(2000, 8, 9), 62]]")