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如何將檢索後的值傳回數據集數據?目前它的價值是空的。我知道由於數組的初始化var durationChartData返回空,我怎麼能更新它,並顯示正確的值後,我從ajax的價值?動態更新Chart.js繪製折線圖數據集數據
var durationChartData = [];
var lineChartData = {
labels: ["Jan","Feb", "Mar","Apr","May","Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"],
datasets: [
{
label: "My Second dataset",
fillColor: "rgba(124,181,236,0.4)",
strokeColor: "rgba(124,181,236,1)",
pointColor: "rgba(151,187,205,1)",
pointStrokeColor: "#fff",
pointHighlightFill: "#fff",
pointHighlightStroke: "rgba(151,187,205,1)",
data: [durationChartData[0],durationChartData[1],durationChartData[2],durationChartData[3],durationChartData[4],durationChartData[5],durationChartData[6],durationChartData[7],durationChartData[8],durationChartData[9],durationChartData[10],durationChartData[11]]
}
]
};
window.onload = function(){
$.ajax({
url: '/rest/analytical/home/viewed/line',
type: 'GET',
dataType: 'json',
success: function (data) {
dataLength = (data + '').length;
for(var i=0; i<dataLength; i++){
durationChartData[i] = data.ret[i].all;
}
},
error: function (data) {
console.log('duration Chart Data: ' + data);
}
});
var linegraph = document.getElementById("linegraph");
var bargraph = document.getElementById("bargraph");
if(linegraph !== null){
var ctx = linegraph.getContext("2d");
window.myLine = new Chart(ctx).Line(lineChartData, {
tooltipTemplate: "<%if (label){%><%=label%>: <%}%><%= value %> min",
responsive: true
});
};
另外,這個解決方案仍然可以工作,但是您使用的構造函數表明您仍在使用庫的版本1.x。考慮升級到2.x. –
我試過這個,但沒有運氣,結果保持不變。 window.myLine.lineChartData.datasets [0] .data = durationChartData; window.myLine.update(); –
你能指點我2.x chart.js或任何代碼參考的正確方向嗎? –