我有一个角度应用程序,在其中我使用角度材料创建了一个表格,并使用API填充了数据。我的代码
ngOnInit() {
this.getChillerApiData();
}
getChillerApiData() {
this.api.getFirstChillerData()
.subscribe((first_data:any) => {
this.first_api_data = first_data;
this.putPrimaryPumpData();
});
}
displayedColumns_primary_pump: string[] = ['Index', 'Pump', 'Frequecy', 'Mode'];
dataSource_primary_pump = new MatTableDataSource<PrimaryPumpDataTable>()
primary_pump_index = 1
@ViewChild('table', { static: true }) primary_pump_table
putPrimaryPumpData(){
this.dataSource_primary_pump.data.push(
{Index: this.primary_pump_index++, Pump: "P-1", Frequecy: String(this.first_api_data["Pr. Chw Pump 1 VFD F/B"]), Mode: String(this.first_api_data["Pr. Chw Pump 1 A/M status"])},
{Index: this.primary_pump_index++, Pump: "Delta T", Frequecy: String(this.first_api_data["Chiller 1 evap Supply temp"] - this.first_api_data["Chiller 1 evap ret Temp"]).slice(0,4), Mode: ""},)
this.primary_pump_table.renderRows();
}
}
我正在尝试获取ngOnIt
中的数据并将其显示在表中。我希望通过每1分钟进行一次API调用来每1分钟更新一次此数据。为此,我添加了一个功能,例如
intervalId : any
getRealTimeData() {
this.getChillerApiData()
clearInterval(this.intervalId);
this.intervalId = setInterval(() => {
this.getChillerApiData();
}, 1000);
}
并在ngOnIt中调用此函数。现在,我可以获取最新数据,但是表中的行将附加新数据。我想用API中的最新值更新表中的行,而不是添加新行。
有人可以帮我吗?
如果您只想替换数据,请执行
putPrimaryPumpData(){
this.dataSource_primary_pump.data = [
{Index: this.primary_pump_index++, Pump: "P-1", Frequecy: String(this.first_api_data["Pr. Chw Pump 1 VFD F/B"]), Mode: String(this.first_api_data["Pr. Chw Pump 1 A/M status"])},
{Index: this.primary_pump_index++, Pump: "Delta T", Frequecy: String(this.first_api_data["Chiller 1 evap Supply temp"] - this.first_api_data["Chiller 1 evap ret Temp"]).slice(0,4), Mode: ""}
]
this.primary_pump_table.renderRows();
}
[您需要先从this.dataSource_primary_pump.data
中清空旧数据,然后再推送更新的数据。
putPrimaryPumpData(){
this.dataSource_primary_pump.data = []; // empty data.
this.dataSource_primary_pump.data.push(
{Index: this.primary_pump_index++, Pump: "P-1", Frequecy: String(this.first_api_data["Pr. Chw Pump 1 VFD F/B"]), Mode: String(this.first_api_data["Pr. Chw Pump 1 A/M status"])},
{Index: this.primary_pump_index++, Pump: "Delta T", Frequecy: String(this.first_api_data["Chiller 1 evap Supply temp"] - this.first_api_data["Chiller 1 evap ret Temp"]).slice(0,4), Mode: ""},)
this.primary_pump_table.renderRows();
}