谷歌图表示例“使用服务器端代码填充数据”无法正常工作

Question

我正在尝试将Google图表与json文件数据一起使用，但是直到Google doc示例对我不起作用...我得到了错误

表没有列

代码与文档完全相同。

<html>
  <head>
    <!--Load the AJAX API-->
    <script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
    <script type="text/javascript" src="//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
    <script type="text/javascript">

    // Load the Visualization API and the piechart package.
    google.charts.load('current', {'packages':['corechart']});

    // Set a callback to run when the Google Visualization API is loaded.
    google.charts.setOnLoadCallback(drawChart);

    function drawChart() {
      var jsonData = $.ajax({
          url: "getData.php",
          dataType: "json",
          async: false
          }).responseText;

      // Create our data table out of JSON data loaded from server.
      var data = new google.visualization.DataTable(jsonData);

      // Instantiate and draw our chart, passing in some options.
      var chart = new google.visualization.PieChart(document.getElementById('chart_div'));
      chart.draw(data, {width: 400, height: 240});
    }

    </script>
  </head>

  <body>
    <!--Div that will hold the pie chart-->
    <div id="chart_div"></div>
  </body>
</html>

<?php 

// This is just an example of reading server side data and sending it to the client.
// It reads a json formatted text file and outputs it.

$string = file_get_contents("sampleData.json");
echo $string;

// Instead you can query your database and parse into JSON etc etc

?>

{
    "cols": [
        {"id":"","label":"Topping","pattern":"","type":"string"},
        {"id":"","label":"Slices","pattern":"","type":"number"}
    ],
    "rows": [
        {"c":[{"v":"Mushrooms","f":null},{"v":3,"f":null}]},
        {"c":[{"v":"Onions","f":null},{"v":1,"f":null}]},
        {"c":[{"v":"Olives","f":null},{"v":1,"f":null}]},
        {"c":[{"v":"Zucchini","f":null},{"v":1,"f":null}]},
        {"c":[{"v":"Pepperoni","f":null},{"v":2,"f":null}]}
    ]
}

Answer 1

也许您没有得到json。您可以console.log（jsonData）看到它。

如果未定义，则应检查ajax代码。 我建议您使用$ .getJSON（）获取json数据

如果是字符串，则应该json.parse。

谷歌图表示例“使用服务器端代码填充数据”无法正常工作

问题描述

1 个解决方案

解决方案1
0 2017-08-14 11:35:51

谷歌图表示例“使用服务器端代码填充数据”无法正常工作

问题描述

1 个解决方案

解决方案1 0 2017-08-14 11:35:51

解决方案1
0 2017-08-14 11:35:51