Dojo图表:如果图表为空,如何返回错误?
我从数据库中提取信息并将其放入dojo图表中。我正在尝试找出如何使用此图表的工作方式返回“无数据消息”:Dojo图表:如果图表为空,如何返回错误?,dojo,charts,Dojo,Charts,我从数据库中提取信息并将其放入dojo图表中。我正在尝试找出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 Ar
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();
var chart1=new dojox.charting.Chart2D(“流量”);
图表1.addPlot(“默认值”,{type:“Columns”,gap:“15”});
图表1.addAxis(“x”{minorTicks:false,字体:“normal normal bold 9pt Arial”,
标签:[{value:1,text:'Sunday'},{value:2,text:'Sunday'},{value:3,text:'Sunday'},{value:4,text:'Sunday'},{value:5,text:'Sunday'},{value:6,text:'Sunday'},{value:7,text:'Sunday'});
图表1.addAxis(“y”,{vertical:true,minorTicks:false,min:0,font:“normal normal bold 12pt Arial”});
图1.添加系列(“系列1”,[]);
chart1.setTheme(dojox.charting.themes.PlotKit.blue);
图表1.addPlot(“网格”{
类型:“网格”,
哈克斯:“x”,
动词“y”,
嗯,是的,
hMinorLines:错误,
VMAjorline:错误,
vMinorLines:错误
});
var anim_t=new dojox.charting.action2d.Tooltip(chart1,“默认”);
图1.render();
如果数据为空,我将在何处添加某种错误处理?检查数据是否没有点,并在带有“无数据”消息的图表上覆盖一个
。否则就把它藏起来