Angular 角材料6-来自维修的垫表数据
我希望将服务中的数据集成到角度材质表中Angular 角材料6-来自维修的垫表数据,angular,service,html-table,Angular,Service,Html Table,我希望将服务中的数据集成到角度材质表中 我看到的所有示例都引用ts文件中的硬数据,但没有引用服务 我的服务允许恢复我所有的病人,功能与引导,但当我想把它与角材料,我不能这样做 有人知道解决办法吗 组件技术 import { Component, OnDestroy, OnInit, ViewChild} from '@angular/core'; import { PatientsService } from '../services/patients.service'; import {
我看到的所有示例都引用ts文件中的硬数据,但没有引用服务 我的服务允许恢复我所有的病人,功能与引导,但当我想把它与角材料,我不能这样做 有人知道解决办法吗
组件技术
import { Component, OnDestroy, OnInit, ViewChild} from '@angular/core';
import { PatientsService } from '../services/patients.service';
import { Patient } from '../models/patient.model';
import { Subscription } from 'rxjs/Subscription';
import { Observable } from 'rxjs/observable';
import { Router } from '@angular/router';
import { MatPaginator, MatTableDataSource } from '@angular/material';
import { DataSource } from '@angular/cdk/collections';
@Component({
selector: 'app-patient-list',
templateUrl: './patient-list.component.html',
styleUrls: ['./patient-list.component.scss']
})
export class PatientListComponent implements OnInit {
displayedColumns = ['prenom', 'nom', 'sexe', 'daten'];
dataSource = new MatTableDataSource<Patient>();
patients: Patient[];
patientsSubscription: Subscription;
constructor(private patientsService: PatientsService, private router: Router)
{}
ngOnInit() {
this.patientsService.getPatients().subscribe(
data => {
this.dataSource.data = data;
}
);
this.patientsService.emitPatients();
}
onNewPatient() {
this.router.navigate(['/patients', 'new']);
}
onDeletePatient(patient: Patient) {
this.patientsService.removePatient(patient);
}
onViewPatient(id: number) {
this.router.navigate(['/patients', 'view', id]);
}
ngOnDestroy() {
this.patientsSubscription.unsubscribe();
}
}
export interface Element {
prenom: string;
nom : string;
sexe: string;
daten: new Date ();
}
<div >
<table mat-table [dataSource]="dataSource" class="mat-elevation-z8">
<ng-container matColumnDef="prenom">
<th mat-header-cell *matHeaderCellDef> Prénom </th>
<td mat-cell *matCellDef="let element"> {{element.prenom}} </td>
</ng-container>
<ng-container matColumnDef="nom">
<th mat-header-cell *matHeaderCellDef> Nom de naissance </th>
<td mat-cell *matCellDef="let element"> {{element.nom}}</td>
</ng-container>
<ng-container matColumnDef="daten">
<th mat-header-cell *matHeaderCellDef> Date de naissance </th>
<td mat-cell *matCellDef="let element"> {{element.daten}} </td>
</ng-container>
<ng-container matColumnDef="sexe">
<th mat-header-cell *matHeaderCellDef> Sexe </th>
<td mat-cell *matCellDef="let element"> {{element.sexe}} </td>
</ng-container>
<tr mat-header-row *matHeaderRowDef="displayedColumns"></tr>
<tr mat-row *matRowDef="let row; columns: displayedColumns;"></tr>
</table>
</div>
服务
import { Injectable } from '@angular/core';
import { Subject } from 'rxjs/Subject';
import { Patient } from '../models/patient.model';
import * as firebase from 'firebase';
import DataSnapshot = firebase.database.DataSnapshot;
import {Observable} from "rxjs";
@Injectable()
export class PatientsService {
patients: Patient[] = [];
patientsSubject = new Subject<Patient[]>();
emitPatients() {
this.patientsSubject.next(this.patients);
}
savePatients() {
firebase.database().ref('/patients').set(this.patients);
}
getPatients() {
firebase.database().ref('/patients')
.on('value', (data: DataSnapshot) => {
this.patients = data.val() ? data.val() : [];
this.emitPatients();
}
);
}
getSinglePatient(id: number) {
enter code herereturn new Promise(
(resolve, reject) => {
firebase.database().ref('/patients/' + id).once('value').then(
(data: DataSnapshot) => {
resolve(data.val());
}, (error) => {
reject(error);
}
);
}
);
}
从'@angular/core'导入{Injectable};
从'rxjs/Subject'导入{Subject};
从“../models/Patient.model”导入{Patient};
从“firebase”导入*作为firebase;
导入DataSnapshot=firebase.database.DataSnapshot;
从“rxjs”导入{observeable};
@可注射()
导出类病人服务{
患者:患者[]=[];
patientsSubject=新主题();
(){
this.patientsSubject.next(this.patients);
}
拯救病人(){
firebase.database().ref('/patients').set(this.patients);
}
获取患者(){
firebase.database().ref(“/patients”)
.on('值',(数据:DataSnapshot)=>{
this.patients=data.val()?data.val():[];
这是一个病人();
}
);
}
getSinglePatient(id:编号){
在此输入代码并返回新承诺(
(解决、拒绝)=>{
firebase.database().ref('/patients/'+id)。一次('value')。然后(
(数据:DataSnapshot)=>{
解析(data.val());
},(错误)=>{
拒绝(错误);
}
);
}
);
}
我没有看到关于这个问题的其他帖子。在我的服务中,我有:
getPatients(): Observable<Patient[]> {
firebase.database().ref('/patients')
.on('value', (data: DataSnapshot) => { this.patients = (data&&data.val())
? data.val() : this.patients} );
return of(this.patients);
}
一个observable不能订阅类型void,你的firebase连接应该有问题,重新检查一下。检查这个-我的firebase连接正常,因为我可以在卡片上显示我的患者。我想这是材料代码-表。Thks Dhiraj Ray,我会去看看哦verry beautiful Abr001am,我如何在我的应用程序中使用你的解决方案?
getPatients(): Observable<Patient[]> {
firebase.database().ref('/patients')
.on('value', (data: DataSnapshot) => { this.patients = (data&&data.val())
? data.val() : this.patients} );
return of(this.patients);
}
ngOnInit() {
this.patientsService.emitPatients();
this.patientsSubscription =
this.patientsService.patientsSubject.subscribe((patients: Patient[]) =>
{this.patients = patients;});
this.patientsService.getPatients().subscribe(data =>
{console.log(this.patientsService.patients[0]); this.dataSource.data =
data;});