我在 Angular 6 应用程序中使用 highcharts-angular。 当我设置数据时,在 ngOnInit 中硬核它,图表可见并且工作正常。
但我想动态更新图表系列,意思是向系列添加点,添加新系列...... 这将在调用 Web API 并获取新数据、调用 loadBidChartData() 后完成。
如果我为聊天设置新系列,或更新系列,图表看不到变化,初始状态没有变化。 我该如何解决这个问题?
这是示例代码的小和平 在 html 中是这样的:
<highcharts-chart [Highcharts]="Highcharts" [options]="chartOptions" style="width: 100%; height: 400px; display: block; overflow: auto;" [update]="true" ></highcharts-chart>
Angular :
import * as Highcharts from 'highcharts';
export class ExampleComponent implements OnInit {
Highcharts = Highcharts; // required
chartOptions = {
chart: {
type: "scatter",
width: 900
},
},
tooltip: {
valueDecimals: 0,
formatter: function () {
return this.y + ' €';
}
},
title: {
text: ''
},
xAxis: {
type: 'datetime',
},
yAxis: {
type: 'number',
},
legend: {
layout: 'vertical',
align: 'right',
verticalAlign: 'top',
floating: false,
borderWidth: 1
},
series: []
};
ngOnInit(): void {
this.chartOptions.series= [{
name: 'first last',
data: [[Date.UTC(2018, 11, 16, 10, 56, 25), 23], [Date.UTC(2018, 11, 16, 10, 57, 15), 132], [Date.UTC(2018, 11, 16, 10, 58, 2), 312], [Date.UTC(2018, 11, 16, 10, 58, 15), 432]]
}];
}
loadBidChartData(bidApiModel: BidItem[]): void {
this.chartOptions.series= [{
name: 'first last',
data: [[Date.UTC(2018, 11, 16, 10, 56, 25), 23], [Date.UTC(2018, 11, 16, 10, 57, 15), 132], [Date.UTC(2018, 11, 16, 10, 58, 2), 312], [Date.UTC(2018, 11, 16, 10, 58, 15), 432]]
},
{
name: 'second last',
data: [[Date.UTC(2018, 11, 16, 10, 56, 28), 50], [Date.UTC(2018, 11, 16, 10, 56, 45), 152], [Date.UTC(2018, 11, 16, 10, 56, 53), 250], [Date.UTC(2018, 11, 16, 10, 57, 11), 320]]
}];
}
}
解决方案:
在后台更新并向 Highcharts 添加和删除点的工作演示:https://stackblitz.com/edit/angular-bv26xz
感谢 User3250 和 Wojciech Chmiel 的帮助。
最佳答案
您需要使用 [(update)]
标志来更新系列如下:
loadBidChartData(bidApiModel: BidItem[]): void {
this.chartOptions.series= [{
name: 'first last',
data: [[Date.UTC(2018, 11, 16, 10, 56, 25), 23], [Date.UTC(2018, 11, 16, 10, 57, 15), 132], [Date.UTC(2018, 11, 16, 10, 58, 2), 312], [Date.UTC(2018, 11, 16, 10, 58, 15), 432]]
},
{
name: 'second last',
data: [[Date.UTC(2018, 11, 16, 10, 56, 28), 50], [Date.UTC(2018, 11, 16, 10, 56, 45), 152], [Date.UTC(2018, 11, 16, 10, 56, 53), 250], [Date.UTC(2018, 11, 16, 10, 57, 11), 320]]
}];
this.updateFlag = true;
}
<highcharts-chart [Highcharts]="Highcharts" [options]="chartOptions" style="width: 100%; height: 400px; display: block; overflow: auto;" [(update)]="updateFlag" ></highcharts-chart>
关于angular - highcharts-angular 从数据库动态更新,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/53374858/