问在Angular中使用Mat表中的NgFor

EN

    <div class="mat-table {{defaultView == 'table' ? 'mat-table-lg' : 'mat-table-sm'}}" data-automation-attribute="div-results">
       <mat-table #table *ngFor="let dataSource of dataSources let Ind = index" [dataSource]="dataSource" matSort>                  
          <ng-container *ngFor="let disCol of displayedColumnss let colIndex = index" matColumnDef="{{disCol}}">
            <mat-header-cell class="tableHeader" style="font-weight: bold" *matHeaderCellDef mat-sort-header>
              {{ columnNames[colIndex] }}  
             
            </mat-header-cell>     
            <mat-header-cell class="tableHeader" style="font-weight: bold" *matHeaderCellDef >
                <mat-cell *matRowDef ><input matInput placeholder="Item Code" >   </mat-cell>    
                <mat-header-cell *matHeaderCellDef> No. </mat-header-cell>
                <mat-cell *matCellDef> {{colIndex}}</mat-cell>
              </mat-header-cell>         
          
            <mat-cell *matCellDef="let element" style="text-align: right" contenteditable="true"
              ><label>{{element[disCol]}}</label>
              </mat-cell>
          </ng-container>
          <mat-header-row *matHeaderRowDef="displayedColumnss"></mat-header-row>
          <mat-row *matRowDef="let row; columns: displayedColumnss;">             
          </mat-row>
        </mat-table><br>
    
      </div>