我已阅读this帖子上的解决方案,但似乎不适合我的问题。我正在使用Google图表构建折线图。 x轴是日期,y轴是整数。

当我运行代码时,我收到一条大错误消息



我正在通过AJAX调用从Web服务获取JSON图表数据。到目前为止我的代码

<script type="text/javascript">

            google.load("visualization", "1", { packages: ["corechart"] });
            google.setOnLoadCallback(drawChart);


            function drawChart() {
                var jsonData = $.ajax({
                    url: "WebService.asmx/HelloWorld",
                    data: "{}",
                    contentType: "application/json; charset=utf-8",
                    dataType: "json",
                    async: false
                }).responseText;

                var options = {
                    title: 'Company Performance'
                };

                var chart = new google.visualization.LineChart(document.getElementById('chart_div1'));
                chart.draw(jsonData, options);
            }


    </script>

最佳答案

该解决方案很简单。...您不能直接从JSON数据填充Google图表。首先需要将JSON格式化为数据表。解决方案如下所示:

  // Load the Visualization API and the piechart package.
          google.load('visualization', '1', { 'packages': ['annotatedtimeline'] });

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

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

              // HERE IS THE FIX!!! 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.AnnotatedTimeLine(document.getElementById('chart_div1'));
              chart.draw(data, { width: 400, height: 240 });
          }

09-10 05:33
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