如何启用多选和动态列的mat-table

import { MatTableModule } from '@angular/material/table';
import { MatCheckboxModule } from '@angular/material/checkbox';
import { MatFormFieldModule } from '@angular/material/form-field';
import { MatInputModule } from '@angular/material/input';

<mat-table [dataSource]="dataSource" matSort>
  <!-- 添加多选列 -->
  <ng-container matColumnDef="select">
    <mat-header-cell *matHeaderCellDef>
      <mat-checkbox (change)="$event ? masterToggle() : null"
                    [checked]="selection.hasValue() && isAllSelected()"
                    [indeterminate]="selection.hasValue() && !isAllSelected()">
      </mat-checkbox>
    </mat-header-cell>
    <mat-cell *matCellDef="let row">
      <mat-checkbox (click)="$event.stopPropagation()"
                    (change)="$event ? selection.toggle(row) : null"
                    [checked]="selection.isSelected(row)">
      </mat-checkbox>
    </mat-cell>
  </ng-container>

  <!-- 添加其他列 -->
  <ng-container matColumnDef="column1">
    <mat-header-cell *matHeaderCellDef mat-sort-header>Column 1</mat-header-cell>
    <mat-cell *matCellDef="let element">{{element.column1}}</mat-cell>
  </ng-container>

  <!-- 其他列的定义 -->

  <!-- 动态列 -->
  <ng-container *ngFor="let column of dynamicColumns" [matColumnDef]="column">
    <mat-header-cell *matHeaderCellDef mat-sort-header>{{column}}</mat-header-cell>
    <mat-cell *matCellDef="let element">{{element[column]}}</mat-cell>
  </ng-container>

  <!-- 添加多选列和其他列到表格 -->
  <mat-header-row *matHeaderRowDef="displayedColumns"></mat-header-row>
  <mat-row *matRowDef="let row; columns: displayedColumns;"></mat-row>
</mat-table>

import { Component } from '@angular/core';
import { MatTableDataSource } from '@angular/material/table';
import { SelectionModel } from '@angular/cdk/collections';

@Component({
  selector: 'app-my-table',
  templateUrl: './my-table.component.html',
  styleUrls: ['./my-table.component.css']
})
export class MyTableComponent {
  dataSource = new MatTableDataSource<any>(data); // 替换data为实际的数据源
  displayedColumns: string[] = ['select', 'column1']; // 替换为实际的列名
  dynamicColumns: string[] = []; // 动态列名

  selection = new SelectionModel<any>(true, []);

  // 全选/取消全选
  masterToggle() {
    this.isAllSelected() ?
        this.selection.clear() :
        this.dataSource.data.forEach(row => this.selection.select(row));
  }

  // 是否全部选中
  isAllSelected() {
    const numSelected = this.selection.selected.length;
    const numRows = this.dataSource.data.length;
    return numSelected === numRows;
  }
}