select中的ngFor in ngFor？

Question

   <li *ngFor="let billingAccount of customerGeneralInfo?.groupedByTechnology">
       <tr *ngFor="let billingaccount of billingAccount.billingAccounts">
        <td>{{billingaccount?.id}}</td>
       </tr>
  </li>

我想把这个billingaccount?.id用select显示出来。有什么建议吗？

Answer 1

假设BillingAccounts是billingAccounts类型的，如果这样做有效，请尝试：

<li *ngFor="let billingAccount of customerGeneralInfo?.groupedByTechnology">
       <select [(ngModel)]="billingAccount.BillingAccounts">
        <option *ngFor="#billingaccount of billingAccount" [value]="billingaccount.id">{{billingaccount.id}}</option>
       </select>
  </li>