我想用角度材料對話框打開組件。我寫這段代碼：sendMessage(): void { const dialogRef = this.matDialog.open(SendMessageComponent, {  data: {    requestRefId: this.requestId  },  panelClass: 'semd_message'});dialogRef.afterClosed().subscribe(res => {  if (res) {    this.FetchMessage();  } });}但是當(dāng)我想打開對話框時，它顯示了這個錯誤：No component factory found for SendMessageComponent. Did you add it to @NgModule.entryComponents?at noComponentFactoryError (core.js:27401)at CodegenComponentFactoryResolver.resolveComponentFactory (core.js:27477)at CdkPortalOutlet.attachComponentPortal (portal.js:810)at MatDialogContainer.attachComponentPortal (dialog.js:354)at MatDialog._attachDialogContent (dialog.js:1161)at MatDialog.open (dialog.js:1028)at MessageComponent.sendMessage (message.component.ts:71)at Object.handleEvent (message.component.html:3)at handleEvent (core.js:45703)at callWithDebugContext (core.js:47343)declarations在我的模塊中，我在, entryComponents,中定義了一個 SendMessageComponent exports。    @NgModule({  declarations: [ListComponent, SendMessageComponent],  imports: [    CommonModule,    BrowserAnimationsModule,    EMoneyDepositRoutingModule,    ReactiveFormsModule,    FormsModule ,    PageLayoutModule,    SecondaryToolbarModule,    TranslateModule.forChild(),    SharedModule,    CoreModule,    BreadcrumbsModule,    Angular2PromiseButtonModule.forRoot(promiseButtonConfig)  ],  exports:[SendMessageComponent],  entryComponents: [SendMessageComponent]})export class EMoneyDepositModule { }現(xiàn)在有什么問題？我該如何解決這個問題？？？