Question

我从数据库中提取信息并将其放入dojo图表中。我正在试图弄清楚如何使用此图表的工作方式返回“无数据消息”：

        var chart1 = new dojox.charting.Chart2D("traffic");
    chart1.addPlot("default", {type: "Columns", gap: "15"});
    chart1.addAxis("x", {minorTicks: false, font: "normal normal bold 9pt Arial",
    labels: [{value: 1, text: 'Monday'},{value: 2, text: 'Tuesday'},{value: 3, text: 'Wednesday'},{value: 4, text: 'Thursday'},{value: 5, text: 'Friday'},{value: 6, text: 'Saturday'},{value: 7, text: 'Sunday'}]});
    chart1.addAxis("y", {vertical: true, minorTicks: false, min: 0, font: "normal normal bold 12pt Arial"});
    chart1.addSeries("Series 1", [<?php echo $trafficseries; ?>]);
    chart1.setTheme(dojox.charting.themes.PlotKit.blue);
    chart1.addPlot("Grid", {
        type: "Grid",
        hAxis: "x",
        vAxis: "y",
        hMajorLines: true,
        hMinorLines: false,
        vMajorLines: false,
        vMinorLines: false
    });
    var anim_t = new dojox.charting.action2d.Tooltip(chart1, "default");
    chart1.render();

如果数据为空，我会在哪里添加某种错误处理？

Answer 1

检查您的数据是否没有积分，并在带有“无数据”消息的图表上覆盖<div>。否则隐藏它。

Dojo图表：如果图表为空，如何返回错误？

1 个答案: