在Angular2中导入ng2-bootstrap模态

我试图使用的模式NG2自举。因此，我将所有内容配置为与以下示例相同：

import { ModalModule } from 'ng2-bootstrap/ng2-bootstrap';

@NgModule({
    bootstrap: [ AppComponent ],
    declarations: [
        AppComponent,
        ...
    ],
    imports: [
        BrowserModule,
        FormsModule,
        HttpModule,
        RouterModule.forRoot(ROUTES),
        ModalModule
    ],
    providers: [ ]
})

但是我仍然收到以下错误：

无法读取未定义的属性“ show”

零件：

import { ViewContainerRef } from '@angular/core';

@Component({
    selector: 'any-comp',
    encapsulation: ViewEncapsulation.None,
    templateUrl: './any-comp.component.html'
})
export class AnyCompComponent implements OnInit {

private viewContainerRef: ViewContainerRef;

constructor(
    private pageContentService: PageContentService,
    viewContainerRef: ViewContainerRef) {
    this.viewContainerRef = viewContainerRef;
}

模板：

<button class="btn btn-primary" (click)="lgModal.show()">Large modal</button>

<div bsModal="bsmodal" #lgmodal="bs-modal" tabindex="-1" role="dialog" aria-labelledby="myLargeModalLabel" aria-hidden="true" class="modal fade">
  <div class="modal-dialog modal-lg">
    <div class="modal-content">
      <div class="modal-header">
        <button type="button" (click)="lgModal.hide()" aria-label="Close" class="close"><span aria-hidden="true">×</span></button>
        <h4 class="modal-title">Large modal</h4>
      </div>
      <div class="modal-body">...</div>
    </div>
  </div>
</div>

我怎样才能解决这个问题？