Google 饼图添加行 - 饼图未呈现

Question

我在 asp.netcore 中有这个 JS 文件。我正在尝试从我的数据库生成饼图，但只有 1 行数据。我没有收到任何错误，但只呈现标题而不是饼图。我的 JS 代码

google.charts.load('current', { 'packages': ['corechart'] });
google.charts.setOnLoadCallback(drawChart);
function drawChart() {
    $.ajax({
        url: '/Index?handler=GlobalChartData',
        dataType: 'json',
        contentType: 'application/json',
        type: 'GET',
        success: MyChart
    });
    function MyChart(globalData) {
        var data = new google.visualization.DataTable(globalData);
        data.addColumn('string', 'GlobalCases');
        data.addColumn('number', 'Data');
        data.addRows([
            ['NewConfirmed', globalData.NewConfirmed],
            ['NewDeaths', globalData.NewDeaths],
            ['NewRecovered', globalData.NewRecovered],
            ['TotalConfirmed', globalData.TotalConfirmed],
            ['TotalDeaths', globalData.TotalDeaths],
            ['TotalRecovered', globalData.TotalRecovered]
        ]);
        var options = { 'title': 'Global Covid Data' };
        var chart = new google.visualization.PieChart(document.getElementById('ChartForGlobal'));
        chart.draw(data, options);
    };
}

我的 C# 代码

public JsonResult OnGetGlobalChartData()
        {
            var globalData = _context.GlobalContexts.ToList();
            return new JsonResult(globalData);
        }

编辑：在添加行中，globalData.NewConfirmed -> NewConfirmed 未定义，其他行也是如此。

Answer 1

我将我的添加行更改为

for (var i = 0; i < globalData.length; i++)
        {
            data.addRows([
                ['NewConfirmed', Number(globalData[i].NewConfirmed)],
                ['NewDeaths', Number(globalData[i].NewDeaths)],
                ['NewRecovered', Number(globalData[i].NewRecovered)],
                ['TotalConfirmed', Number(globalData[i].TotalConfirmed)],
                ['TotalDeaths', Number(globalData[i].TotalDeaths)],
                ['TotalRecovered', Number(globalData[i].TotalRecovered)]
            ]);
        }

现在我的图表已经生成了。谢谢@Swati。

Google 饼图添加行 - 饼图未呈现

Google pie charts add rows - pie chart didn't rendered

javascript

ajax

google-pie-chart