Ich arbeite derzeit mit ASP.NET an Google Chart und verbinde es mit der Datenbank (SQL Server). Ich habe jedoch ein Problem beim Anpassen des Tooltips.

Hier ist der Header Code:

<script src="js/jquery/jquery-1.10.2.js" type="text/javascript"></script>
<script src="http://www.google.com/jsapi" type="text/javascript"></script>
<script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
<script type="text/javascript">
    google.charts.load('1.1', { 'packages': ['bar'] });

</script>
<script type="text/javascript">
    $(function () {
        $.ajax({
            type: 'POST',
            dataType: 'json',
            contentType: 'application/json',
            url: 'sample_page.aspx/GetChartData',
            data: '{}',
            success: function (response) {
                drawchart(response.d); // calling method
            },

            error: function () {
                alert("Error Loading Data");
            }
        });
    })

    function drawchart(dataValues) {
        // Callback that creates and populates a data table,
        // instantiates the pie chart, passes in the data and
        // draws it.

        // Instantiate and draw our chart, passing in some options
        var chart = new google.charts.Bar(document.getElementById('BarChartsDIV'));
        var data = new google.visualization.DataTable();

        data.addColumn('string', 'customer');
        data.addColumn('number', 'percent_submitted')
        data.addColumn({type: 'string', role: 'tooltip'});


        for (var i = 0; i < dataValues.length; i++) {
            data.addRow([dataValues[i].customer,
            { v: dataValues[i].percent_submitted, f: dataValues[i].percent_submitted+ '%'},'TEST TOOL TIP']);
        }

        var view = new google.visualization.DataView(data);
        view.setColumns([0, 1, 2]);

        chart.draw(view,
          {
              tooltip: { isHtml: true},
              title: "",
              legend: { position: 'none' },
              bars: 'horizontal', // Required for Material Bar Charts.
              axes: {
                  x: {
                      0: { side: 'top', label: '' }, // Top x-axis.
                  },
                  y: {
                      0: { label: '' } //Side y-axis
                  }

              },
              bar: { groupWidth: '70%' },

          });
    }
</script>

Leider funktioniert der Tooltip nicht. In der QuickInfo werden nur der Kundenname und der Prozentsatz angezeigt.

Sample Generated Chart