Angular6 在角坐标上更新mat表

在数据库中插入数据后，我需要更新mat表。我的表单和mat表在同一页中。从表单中，我将数据插入数据库。在数据库上成功插入。但是我的mat表没有更新。如果我刷新页面，mat表将更新。但我需要在将数据插入数据库后更新mat表

春季服务 AppComponent.ts Appcomponent.html

---

您可以使用BehaviorSubject对象，通过该对象可以调用更新订阅元素的下一个函数，例如：

@Component({selector:'my-component', templateUrl: './my-component.html', style:[]})
export class MyComponentComponent implements OnInit, OnDestroy {
  private dataObj = new BehaviorSubject<any>([]);
  private dataSubscription: Subscription;

  constructor(private http: HttpClient, springService: SpringService){

    // Subscribe with BehaviorSubject
    this.dataSunscription= this.dataObj
                               .asObservable()
                               .subscribe(res => this.clubdetails.data= res);

    this.refreshData(); // fill with first data
  }

  ngOnInit(): void {}

  ngOnDestroy(): void {
    this.dataSubscription.unsubscribe();
  } 

  // Refresh the data, and call the next function of BehaviorSubject
  refreshData(){
    this.springService.getAllClubs()
        .toPromise()
        .then( dt => this.dataObj.next(dt));        
  }

  mymethod(){
    // Call your code

    refreshData(); // Refresh after post the data
  }
}

---

您可以在

上看到一个示例，您可以使用BehaviorSubject对象，通过此调用下一个函数来更新订阅元素，例如：

@Component({selector:'my-component', templateUrl: './my-component.html', style:[]})
export class MyComponentComponent implements OnInit, OnDestroy {
  private dataObj = new BehaviorSubject<any>([]);
  private dataSubscription: Subscription;

  constructor(private http: HttpClient, springService: SpringService){

    // Subscribe with BehaviorSubject
    this.dataSunscription= this.dataObj
                               .asObservable()
                               .subscribe(res => this.clubdetails.data= res);

    this.refreshData(); // fill with first data
  }

  ngOnInit(): void {}

  ngOnDestroy(): void {
    this.dataSubscription.unsubscribe();
  } 

  // Refresh the data, and call the next function of BehaviorSubject
  refreshData(){
    this.springService.getAllClubs()
        .toPromise()
        .then( dt => this.dataObj.next(dt));        
  }

  mymethod(){
    // Call your code

    refreshData(); // Refresh after post the data
  }
}

您可以在app.component.ts中的

上看到一个示例。请尝试以下代码

 getClubList() {
  this.springService.getAllClubs().pipe(
  ........
  ).subscribe(res => {this.clubdetails.data= res;
this.dataSource = new MatTableDataSource(this.Model_Obj_Name);});
  }

在app.component.ts中，尝试以下代码：

 getClubList() {
  this.springService.getAllClubs().pipe(
  ........
  ).subscribe(res => {this.clubdetails.data= res;
this.dataSource = new MatTableDataSource(this.Model_Obj_Name);});
  }

---

只需在getClubList方法中进行以下更改：

---

只需在getClubList方法中进行以下更改：

 getClubList() {
  this.springService.getAllClubs().pipe(
  ........
  ).subscribe(res => {this.clubdetails.data= res;
this.dataSource = new MatTableDataSource(this.Model_Obj_Name);});
  }

  getClubList() {
    this.springService.getAllClubs().pipe(
      ........
    ).subscribe(res => {
        this.clubdetails.data = res;
        this.clubdetails.data = this.clubdetails.data;
      });
  }