類型爲void是不能分配給輸入任何

Question

我有我的部分代碼

export class AddNewCardComponent { 

    public concept = []; 
    constructor( 
     private _router: Router, 
     private _empDiscService: empDiscService) { 

     } 

    ngOnInit(){ 
     this.concept = this._empDiscService.StoreMaster() 
     .subscribe((data)=>{ 
      this.concept = data; 
     }); 
    } 
} 

它只是我想從服務中獲得VAR並把它放在我的店裏= [];

但它說

void類型是不能分配給輸入任何

這裏是我的服務代碼

import {Injectable} from '@angular/core'; 
import { Httpprovider } from './httpprovider'; 

@Injectable() 
export class empDiscService{ 

    public storedata = []; 
    constructor(private _httpprovider: Httpprovider){ 

    } 

    StoreMaster():Observable<any[]>{ 
     return this._httpprovider.httpReq('http://192.168.1.40:5000/getconcept','GET',null,null).map(res =>{<any[]>res.json()} 
    }; 
} 

Answer 1

您不得subscribe()裏面的服務，並返回直接對象，這不是RxJs的意圖。

export class empDiscService{ 

    public storedata = []; 
    constructor(private _httpprovider: Httpprovider){ 

    } 
    StoreMaster():Observable<any[]>{ 
     return this._httpprovider.httpReq('http://192.168.1.40:5000/getmapmasterstore','GET',null,null).map(res =>{<any[]>res.json()} 
    } 

} 

你的組件應該是

constructor( 
     private _router: Router, 
     private _empDiscService: empDiscService) { 
      this.store = this._empDiscService.StoreMaster() 
      .subscribe((data)=>{ 
        this.storedata = data; 
     }); 
} 

，你所做的實際的錯誤是服務方法不返回任何東西

StoreMaster():Observable<any[]>{} 

這將解決您的問題

Answer 2

StoreMaster（ ）方法不返回任何東西。您可能需要更改服務方法返回觀察到：

StoreMaster(){ 
return this._httpprovider.httpReq('http://192.168.1.40:5000/getmapmasterstore','' + 
    ' GET',null,null).subscribe((data)=>{ 
    var brData = []; 
    for (let i=0;i<data.length;i++){ 
    brData.push(data[i]); 
    } 
    return brData; 
}); 
} 

和ngOnInit

ngOnInit(){ 
     this._empDiscService.StoreMaster() 
      .subscribe(store => this.store = store); 
    } 

Answer 3

import { JobService } from './../services/job.service'; 
import { Component, OnInit } from '@angular/core'; 



@Component({ 
    selector: 'app-job-list', 
    templateUrl: './job-list.component.html', 
    styleUrls: ['./job-list.component.css'] 
}) 
export class JobListComponent implements OnInit { 

**jobs:any = [];** 
erreur = ''; 
    constructor(private jobservice:JobService) { } 

    ngOnInit() { 
    this.jobservice.getJobs().subscribe(

     data => this.jobs = data, 
     error => {console.log ('error')} 

    ); 


    } 

}