jQWidgets jqxChart saveAsPNG()方法

jQWidgets是一个JavaScript框架，用于为PC和移动设备制作基于Web的应用程序。它是一个非常强大和优化的框架，与平台无关，并得到广泛支持。jqxChart是一个100%用javascript编写的轻量级和强大的图表小工具。它提供了许多先进的功能，并支持三种不同的渲染技术 – SVG, HTML5 Canvas & VML。

saveAsPNG()方法用于将图表的内容导出为PNG图像。它接受fileName、exportServer类型的值作为参数，接受字符串类型的值，不返回任何值。

语法:

var saveAsPNG = $('#jqxChart')
    .jqxChart('saveAsPNG', string);

链接的文件：从链接中下载https://www.jqwidgets.com/download/。在HTML文件中，找到下载文件夹中的脚本文件。

<link rel=”stylesheet” href=”jqwidgets/styles/jqx.base.css” type=”text/css” />
<script type=”text/javascript” src=”scripts/jquery-1.11.1.min.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxcore.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxchart.core.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxdraw.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxdata.js”></script>

例子：下面的例子说明了jQWidgets中jqxChart saveAsPNG()方法。

<!DOCTYPE html>
<html lang="en">
  
<head>
    <link rel="stylesheet" 
          href="jqwidgets/styles/jqx.base.css" 
          type="text/css" />
    <script type="text/javascript" 
            src="scripts/jquery-1.11.1.min.js">
    </script>
    <script type="text/javascript" 
            src="jqwidgets/jqxcore.js">
    </script>
    <script type="text/javascript" 
            src="jqwidgets/jqxchart.core.js">
    </script>
    <script type="text/javascript" 
            src="jqwidgets/jqxdraw.js">
    </script>
    <script type="text/javascript" 
            src="jqwidgets/jqxdata.js">
    </script>
</head>
  
<body>
    <center>
        <h1 style="color: green">
            GeeksforGeeks
        </h1>
  
        <h3>jQWidgets jqxChart saveAsPNG() method</h3>
  
        <button id='gfg'>Click Here</button>
  
        <div id='gfg1' 
            style="width:600px; height: 400px">
        </div>
    </center>
  
    <script type="text/javascript">
         $(document).ready(function () { var json = [ { Day: 'Monday', A: 3, B: 1, C: 2, D: 1 }, { Day: 'Tuesday', A: 3, B: 1, C: 2, D: 1 }, { Day: 'Wednesday', A: 3, B: 1, C: 2, D: 1 }, { Day: 'Thursday', A: 3, B: 1, C: 2, D: 1 }, { Day: 'Friday', A: 3, B: 1, C: 2, D: 1 }, { Day: 'Saturday', A: 3, B: 1, C: 2, D: 1 }, { Day: 'Sunday', A: 3, B: 1, C: 2, D: 1 } ]; var obj = { title: "Coding Score", description: "Coding Questions Solved Daily", source: json, toolTipMoveDuration: 1000, categoryAxis: { dataField: 'Day', showGridLines: true }, seriesGroups: [{ type: 'column', columnsGapPercent: 30, seriesGapPercent: 0, valueAxis: { minValue: 0, maxValue: 10, unitInterval: 10, description: 'Questions Solved' }, series: [ { dataField: 'A', displayText: 'A' }, { dataField: 'B', displayText: 'B' }, { dataField: 'C', displayText: 'C' }, { dataField: 'D', displayText: 'D' } ] }] };$ ('#gfg1').jqxChart(obj);
  
             $('#gfg').click(function () {$ ('#gfg1').jqxChart(
                    'saveAsPNG', 'myChart.png',
'http://www.jqwidgets.com/export_server/export.php');
            });
        });
    </script>
</body>
  
</html>

输出:

jQWidgets jqxChart saveAsPNG()方法