我试图用折线图显示mysql表中的数据。x轴代表职员姓名,y轴代表身份证号码。我遇到了一个问题,字符串(员工姓名)没有显示在x轴上,它只显示数值。到目前为止,我尝试的代码是:
<?php
$dataPoints = array();
try{
$link = new PDO('mysql:host=localhost;dbname=aa', 'root', '');
$handle = $link->prepare('select * from staff');
$handle->execute();
$result = $handle->fetchAll(PDO::FETCH_OBJ);
foreach($result as $row){
array_push($dataPoints, array("x"=> $row->Name, "y"=> $row->id));
}
$link = null;
}
catch(PDOException $ex){
print($ex->getMessage());
}
?>
<!DOCTYPE HTML>
<html>
<head>
<script>
window.onload = function () {
var chart = new CanvasJS.Chart("chartContainer", {
animationEnabled: true,
exportEnabled: true,
theme: "light1",
title:{
text: "PHP Column Chart from Database"
},
xaxis
data: [{
type: "line", //change type to bar, line, area, pie, etc
yValueFormatString: "$#,##0K",
indexLabel: "{y}",
indexLabelPlacement: "inside",
indexLabelFontWeight: "bolder",
indexLabelFontColor: "white",
dataPoints: <?php echo json_encode($dataPoints, JSON_NUMERIC_CHECK); ?>
}]
});
chart.render();
}
</script>
</head>
<body>
<center><div id="chartContainer" style="height: 370px; width: 50%;"></div></center>
<script src="https://canvasjs.com/assets/script/canvasjs.min.js">
</script>
</body>
</html>
2条答案
按热度按时间f2uvfpb91#
如果你看到关于canvasjs datapoint属性x的文档,只接受数字值,你应该使用label。试着改变
到
enxuqcxy2#
x值可以是数字或日期时间值。但在你的情况下,这似乎是一个字符串。在您的案例中,可以使用轴标签,而不是x值。