angular - 在 Angular 6 中动态选择选项

Question

如何选择 option在 Angular 6 中动态？页面有很多select s 如图所示:



如果它等于 parcela.forma_parcela，我如何动态选择一个选项的值?
parcela.forma_parcela = [0,1,2,3,4,5,6];

<select (change)="setBancoParcela($event.target.value, parcela)" class="input-default" name="forma_pagamento_1" id="forma_pagamento_1">
    <option value="0" [selected]="parcela.forma_parcela == this.value">Banco</option>
    <option value="1" [selected]="parcela.forma_parcela == this.value">BNDES</option>
    <option value="2" [selected]="parcela.forma_parcela == this.value">Boleto</option>
    <option value="3" [selected]="parcela.forma_parcela == this.value">Cartão de Crédito</option>
    <option value="4" [selected]="parcela.forma_parcela == this.value">Cartão de Débito</option>
    <option value="5" [selected]="parcela.forma_parcela == this.value">CH Descontado</option>
    <option value="6" [selected]="parcela.forma_parcela == this.value">Cheque</option>
    <option value="7" [selected]="parcela.forma_parcela == this.value">DDA</option>
    <option value="8" [selected]="parcela.forma_parcela == this.value">Débito Automático</option>
    <option value="9" [selected]="parcela.forma_parcela == this.value">Depósito em C/C</option>
</select>

Answer 1

使动态的正确方法是:

<select id="select-type-basic" [(ngModel)]="status">
    <option *ngFor="let status_item of status_values">
    {{status_item}}
    </option>
</select>

值应避免在选项内，因为这将设置“选择字段”的默认值。默认选择应与 [(ngModel)] 绑定(bind)，选项应同样声明。

status : any = "Completed";
status_values: any = ["In Progress", "Completed", "Closed"];