我有一個細節形成應該從列表表單中選擇時加載一個記錄的細節。當細節形成加載時,它應該顯示所選記錄的詳細信息。在我的情況下,給出了詳細的比較正常的,但它在控制檯上顯示標題錯誤,導致應用程序崩潰。類型錯誤:無法在Object.View_FullEditTaxComponent_0._co讀取未定義的屬性「taxTypeId」 [如updateDirectives]
HTML(誤差線)
<select id="taxTypeId" name="TaxTypeId" [(ngModel)]="tax.taxTypeId" class="form-control" >
<option *ngFor="let tt of taxTypes" value={{tt.id}}>{{tt.name}}</option>
</select>
<label for="taxTypeId" class="form-label">Tax Type</label>
打字稿
import { Component, ViewChild, Injector, Output, EventEmitter, ElementRef, OnInit } from '@angular/core';
import { RouterLink, Router, ActivatedRoute } from '@angular/router';
import { TaxServiceProxy, TaxDto, ListResultDtoOfTaxTypeDto } from '../../../shared/service-proxies/tax-service-proxies';
import { TaxTypeDto } from '../../../shared/service-proxies/taxType-service-proxies';
import { AppComponentBase } from '@shared/app-component-base';
@Component({
selector: 'app-full-edit-tax',
templateUrl: './full-edit-tax.component.html',
styleUrls: ['./full-edit-tax.component.css']
})
export class FullEditTaxComponent extends AppComponentBase implements OnInit {
active: boolean = false;
saving: boolean = false;
tax: TaxDto;
taxTypes: TaxTypeDto[] = [];
@Output() fromSave: EventEmitter<any> = new EventEmitter<any>();
constructor(
_router: Router,
injector: Injector,
private _taxService: TaxServiceProxy,
private route: ActivatedRoute
) {
super(injector);
this.router = _router;
}
ngOnInit() {
this.loadData();
this.getTaxTypes();
}
loadData(): void {
let id = this.route.snapshot.params['id'];
this._taxService.get(id)
.subscribe((result: TaxDto) => {
this.tax = result;
})
}
getTaxTypes(): void {
this._taxService.getTaxTypes()
.subscribe((result: ListResultDtoOfTaxTypeDto) => {
this.taxTypes = result.items;
});
}
}
如何解決這個嗎?
所選的選項應該是其值等於'tax.taxTypeId'的選項,但是'tax'未初始化,因此未定義,因此無法讀取'tax.taxTypeId'的值。初始化'this.tax'。 –