小编Rag*_*M U的帖子

我使用Angular material@5.0.0-rc.2在mat-table中的每一行添加了EDIT,DELETE和DETAILS按钮.所有按钮都正常工作但是,*我收到错误"无法读取未定义的属性'模板'和*每按一次按钮,所有内容都显示在同一页面上

itemlist.component.html

<mat-table #table [dataSource]="dataSource">
  <ng-container matColumnDef="name">
    <mat-header-cell *matHeaderCellDef> Name </mat-header-cell>
    <mat-cell *matCellDef="let row"> {{row.name}} </mat-cell>
  </ng-container>

  <ng-container matColumnDef="description">
    <mat-header-cell *matHeaderCellDef> Description </mat-header-cell>
    <mat-cell *matCellDef="let row"> {{row.description}} </mat-cell>
  </ng-container>

  <ng-container matColumnDef="actions">
    <mat-cell *matCellDef="let row">
      <button mat-button (click)="showDetails(row)">DETAILS</button>
      <button mat-button (click)="editItem(row)">EDIT</button>
      <button mat-button (click)="deleteItem(row)">DELETE</button>
    </mat-cell>
  </ng-container>

  <mat-header-row *matHeaderRowDef="displayedColumns"></mat-header-row>
  <mat-row *matRowDef="let row; columns:displayedColumns"></mat-row>
</mat-table>

itemlist.component.ts

export class ItemListComponent {
  @Input() dataSource;
  displayedColumns = ['name', 'description', 'actions'];

  @Input() items: Item[];
  @Output() onEdit = new EventEmitter<Item>();
  @Output() onShow = new EventEmitter<Item>();
  @Output() onDelete …