Forum Replies Created by Vishwas R
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Handling the ratio of the chart’s height and firing event at proper pixel co-ordinate should work fine in this case. Please take a look at this updated JSFiddle.
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Vishwas R
Team CanvasJSYou can retrieve the data points from the database and pass it on chart options as shown in below code snippet.
<?php $dataPoints = array(); $con=mysqli_connect("localhost","root","","test"); //mysqli_connect("host","username","password","db"); - Refer https://www.w3schools.com/php/func_mysqli_connect.asp for more info if (mysqli_connect_errno()) { echo "Failed to connect to MySQL: " . mysqli_connect_error(); } $sql="SELECT xval,yval FROM datapoints"; if ($result=mysqli_query($con,$sql)){ foreach($result as $row){ array_push($dataPoints, array("x"=> $row["xval"], "y"=> $row["yval"])); } } mysqli_close($con); ?> <!DOCTYPE HTML> <html> <head> <script> window.onload = function () { var chart = new CanvasJS.Chart("chartContainer", { animationEnabled: true, exportEnabled: true, theme: "light1", // "light1", "light2", "dark1", "dark2" exportEnabled: true, title:{ text: "PHP Column Chart from Database - MySQLi" }, data: [{ type: "column", //change type to bar, line, area, pie, etc dataPoints: <?php echo json_encode($dataPoints, JSON_NUMERIC_CHECK); ?> }] }); chart.render(); } </script> </head> <body> <div id="chartContainer" style="height: 360px; width: 50%; margin: auto;"></div> <script src="https://cdn.canvasjs.com/canvasjs.min.js"></script> </body> </html>Please take a look at this Sample Project for complete working sample.
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Vishwas R
Team CanvasJS
