ngFor循环和ngIf循环

Question

我是TypeScript的初学者。我正在尝试创建一个循环来迭代我的所有系列：ngFor =＆＃34;让系列的listList＆＃34;，并显示其模态等于＆＃39; CT＆＃39;：ngIf =＆＃34 ; series.instance.modality ==＆＃39; CT＆＃39;

我试试这个：

<series [series]=series *ngFor="let series of seriesList; let i = index">
  <series *ngIf="series.instance.modality == 'CT'"></series>
</series>

而且：

<series [series]=series 
        *ngFor="let series of seriesList; 
        let i = index; 
        *ngIf="series.instance.modality == 'CT'">
</series>

/////////////// EDIT //////////////：

我试试这个：

<ng-container *ngIf="series.instance.modality == 'CT'">
  <series [series]="series" *ngFor="let series of seriesList; let i = index">
  </series>
</ng-container>

但这不起作用，因为如果我认为我必须在我之前做我的循环..