从angular中的模式插入后更新表数据

export class Item {
  id: number;
  name: string;
  description: string;
}

import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { Observable } from 'rxjs';

@Injectable({
  providedIn: 'root'
})
export class DataService {
  private apiUrl = 'http://example.com/api/items'; // 后端API的URL

  constructor(private http: HttpClient) { }

  getItems(): Observable<Item[]> {
    return this.http.get<Item[]>(this.apiUrl);
  }

  insertItem(item: Item): Observable<Item> {
    return this.http.post<Item>(this.apiUrl, item);
  }
}

import { Component, OnInit } from '@angular/core';
import { DataService } from 'path/to/data.service';

@Component({
  selector: 'app-items',
  templateUrl: './items.component.html',
  styleUrls: ['./items.component.css']
})
export class ItemsComponent implements OnInit {
  items: Item[];

  constructor(private dataService: DataService) { }

  ngOnInit() {
    this.getItems();
  }

  getItems() {
    this.dataService.getItems().subscribe(items => {
      this.items = items;
    });
  }

  insertItem(item: Item) {
    this.dataService.insertItem(item).subscribe(() => {
      this.getItems(); // 插入后更新表数据
    });
  }
}

<table>
  <tr *ngFor="let item of items">
    <td>{{ item.id }}</td>
    <td>{{ item.name }}</td>
    <td>{{ item.description }}</td>
  </tr>
</table>

<form (submit)="insertItem(newItem)">
  <input type="text" [(ngModel)]="newItem.name" placeholder="Name">
  <input type="text" [(ngModel)]="newItem.description" placeholder="Description">
  <button type="submit">Insert</button>
</form>