Question

更新画布图表中的数据点时出现问题。我收到此错误消息：

未捕获的TypeError：无法读取未定义的属性“ getTime”

我在response.msg中收到的输出是

[{label: 'Purok I', y:1},{label: 'Purok II', y:1},{label: 'Purok III', y:2}]

将其替换为response会成功呈现图表。但是，将响应传递给datapoints会产生错误。这是我的Javascript。有帮助吗？

$('#barangay-list').click(function() {
  var barangay_id = $(this).val()
  console.info(barangay_id)
  $.ajax({
    url: '../classes/main.php',
    type: 'POST',
    data: {
      'population-chart': 1,
      'barangay_id': barangay_id
    },
    async: true,
    dataType: 'JSON',
    success: function(response, data) {
      var chart = new CanvasJS.Chart("chartContainer", {
        theme: "light2",
        zoomEnabled: true,
        animationEnabled: true,
        animationEnabled: true,
        axisX: {
          title: "Street Name",
          gridThickness: .9,
          lineThickness: .9,
          titleFontSize: 14,
          labelFontSize: 12,
        },
        axisY: {
          includeZero: true,
          title: "Number of Population",
          gridThickness: .9,
          lineThickness: .9,
          titleFontSize: 14,
          labelFontSize: 12
        },
        toolTip: {
          shared: "true"
        },
        legend: {
          cursor: "pointer",
          itemclick: toggleDataSeries,
          verticalAlign: "bottom",
          horizontalAlign: "center"
        },
        data: [{
          type: "spline",
          showInLegend: true,
          name: "Populaltion Number",
          dataPoints: response.msg
        }]
      });
      chart.render();

      function toggleDataSeries(e) {
        if (typeof(e.dataSeries.visible) === "undefined" || e.dataSeries.visible) {
          e.dataSeries.visible = false;
        } else {
          e.dataSeries.visible = true;
        }
        chart.render();
      }
    },
    // Error Handler
    error: function(xhr, textStatus, error) {
      console.info(xhr.responseText);
    }
  });
});

Answer 1

我在这种关心的人Converting array with Different data type的帮助下解决了问题

删除此代码：

char

添加JSON.parse（）和地图功能

async: true,
dataType: 'JSON',

未捕获的类型错误：无法读取未定义的属性

1 个答案: