Angular 角度材质表动态列

我已经创建了mat table组件，它通过我粘贴的数据生成动态列，但没有动作图标

    <table mat-table [dataSource]="data" class="mat-elevation-z8">

      <ng-container [matColumnDef]="item.columnDef" *ngFor="let item of columns; let i = index">
        <th mat-header-cell *matHeaderCellDef>{{ item.header }}</th>
        <td mat-cell *matCellDef="let element">{{ element[item.columnDef] }}</td> 
      </ng-container>

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

我需要的是： 我想生成带有图标的列操作

-

问题: 我需要在

item.columnDef==='action'

和渲染垫图标时检查此循环

*ngFor=“let item of columns；”

{{item.header}}
//如果item.columnDef==‘action’，则为mat图标
//else{{element[item.columnDef]}
{{icon.icon}

所以我做出了这个决定。它对我来说很好

<table mat-table [dataSource]="dataSource"  class="mat-elevation-z8" matSort>
  <ng-container [matColumnDef]="item.columnDef" *ngFor="let item of columns; let i = index">
    <th mat-header-cell *matHeaderCellDef mat-sort-header [disabled]="item.columnDef=='action'? true : false ">{{ item.header }}</th>
  
     <ng-container *ngIf="!item.actions"> // *if column is not the action column then render normal column
       <td mat-cell *matCellDef="let element; let i = index">{{ item.header =='ID' ?  matPaginator.pageSize * matPaginator.pageIndex + i + 1 : element[item.columnDef] }}</td>
     </ng-container>
  
     <td mat-cell *matCellDef="let element" class="action-link">
       // *rendering actions in the action column for instance it can be edit or delete
       <mat-icon aria-hidden="false" [attr.aria-label]='action.aria_label' *ngFor="let action of item.actions"  [matTooltip]="action.matTooltip" (click)="getEvent(action,element)">{{action.icon}}</mat-icon>
     </td>
  </ng-container>

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

{{item.header}}
//*如果列不是操作列，则渲染普通列
{{item.header=='ID'？matPaginator.pageSize*matPaginator.pageIndex+i+1:element[item.columnDef]}
//*在“操作”列中呈现操作，例如，可以编辑或删除
{{action.icon}

关于这个问题有什么更新吗？@是的，我设法解决了。请查看答案。

    <ng-container [matColumnDef]="item.columnDef" *ngFor="let item of columns; let i = index">
    <th mat-header-cell *matHeaderCellDef>{{ item.header }}</th>
    <td mat-cell *matCellDef="let element">

      // if item.columnDef == 'action' then mat-icon
      // else  {{ element[item.columnDef] }}

       <mat-icon aria-hidden="false" aria-label="edit" *ngFor="let icon of item.actions" [matTooltip]="icon.matTooltip" (click)="check()">{{icon.icon}}</mat-icon>
   
      </td>
  </ng-container>

<table mat-table [dataSource]="dataSource"  class="mat-elevation-z8" matSort>
  <ng-container [matColumnDef]="item.columnDef" *ngFor="let item of columns; let i = index">
    <th mat-header-cell *matHeaderCellDef mat-sort-header [disabled]="item.columnDef=='action'? true : false ">{{ item.header }}</th>
  
     <ng-container *ngIf="!item.actions"> // *if column is not the action column then render normal column
       <td mat-cell *matCellDef="let element; let i = index">{{ item.header =='ID' ?  matPaginator.pageSize * matPaginator.pageIndex + i + 1 : element[item.columnDef] }}</td>
     </ng-container>
  
     <td mat-cell *matCellDef="let element" class="action-link">
       // *rendering actions in the action column for instance it can be edit or delete
       <mat-icon aria-hidden="false" [attr.aria-label]='action.aria_label' *ngFor="let action of item.actions"  [matTooltip]="action.matTooltip" (click)="getEvent(action,element)">{{action.icon}}</mat-icon>
     </td>
  </ng-container>

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