ngOnInit(): void {
this.filteredAccountOptions = this.accountControl.valueChanges
.pipe(
startWith(''),
map(value => this.accountFilter(value))
);
.
.
.
实际上,“ return this.createDialogService.accountOptions”语句在“ accountSearch(value)”方法的上一行中完成预订部分之前就已执行。这就是显示先前数据的原因。
private accountFilter(value: string): string[] {
this.accountSearch(value);
return this.createDialogService.accountOptions
}
accountSearch(searchedValue: string) {
this.createDialogService.searchAccount(searchedValue).subscribe(
(success) => {
this.createDialogService.accountOptions = JSON.parse(success.message)
},
(error) => {}
)
}
我的HTML
<input type="text" matInput [formControl]="accountControl" [matAutocomplete]="auto1">
<mat-autocomplete #auto1="matAutocomplete">
<mat-option *ngFor="let option of filteredAccountOptions | async" [value]="option.Name">
{{option.Name}}
</mat-option>
</mat-autocomplete>
由于您在返回Observable之后更改了数据,使用swithMap
运算符。为避免服务器过载,请使用debounceTime
。
ngOnInit(): void {
this.filteredAccountOptions = this.accountControl.valueChanges.pipe(
startWith(''),
debounceTime(3000),
switchMap(value => this._accountFilter(value)),
);
}
private _accountSearch(searchedValue: string): Observable<any> {
return this.createDialogService.searchAccount(searchedValue).pipe(
map(success => JSON.parse(success.message)),
);
}