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angular - highcharts-angular 从数据库动态更新

问题描述

我在 Angular 6 应用程序中使用 highcharts-angular。当我在 ngOnInit 中设置数据，对其进行硬核时，图表是可见的并且可以正常工作。

但我想动态更新图表系列，这意味着向系列添加点，添加新系列......这将在调用 web API 并获取新数据后完成，调用 loadBidChartData()。

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html中的示例代码的小和平是这样的：

<highcharts-chart [Highcharts]="Highcharts" [options]="chartOptions" style="width: 100%; height: 400px; display: block; overflow: auto;" [update]="true" ></highcharts-chart>

角度：

 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]]
    }];
 }
}

Solution: Working demo with updating in background and adding and removing points to highcharts: https://stackblitz.com/edit/angular-bv26xz
Thank you User3250 and Wojciech Chmiel for the help.

标签： angularhighcharts

解决方案

You need to use [(update)] flag to update the series as below:

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>

Working demo here: https://stackblitz.com/edit/angular-d5spve

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