小编mev*_*aka的帖子

我需要使用没有模型的角度材料表,因为我不知道服务会是什么.

所以我初始化我MatTableDataSource和displayedColumns动态地在这样的组件:

TableComponent:

ngOnInit() {

this.vzfPuanTablo = [] //TABLE DATASOURCE

//GET SOMETHING FROM SERVICE 
this.listecidenKisi = this.listeciServis.listecidenKisi;
this.listecidenVazife = this.listeciServis.listecidenVazife;

//FILL TABLE DATASOURCE 
var obj = {};
for (let i in this.listecidenKisi ){
    for( let v of this.listecidenVazife[i].vazifeSonuclar){
        obj[v.name] = v.value;
    }
    this.vzfPuanTablo.push(obj);
    obj={};
}

//CREATE DISPLAYED COLUMNS DYNAMICALLY
this.displayedColumns = [];
for( let v in this.vzfPuanTablo[0]){
    this.displayedColumns.push(v);
}

//INITIALIZE MatTableDataSource
this.dataSource = new MatTableDataSource(this.vzfPuanTablo);
}

代码中最重要的部分是:

for( let v in this.vzfPuanTablo[0]){
    this.displayedColumns.push(v);
}

Run Code Online (Sandbox Code Playgroud)

我在displayedColumns …

我无法更新我的角度服务变量值.

我有两个不相关的组件,我想使用服务将更新的对象从一个发送到另一个.但是我无法在服务中更新对象.

第一部分:

import { SoruService } from '../soru.service';
import { SoruModel, SecenekModel } from '../soruModel';

@Component({
    selector: 'app-first',
    templateUrl: './first.component.html',
    styleUrls: ['./first.component.scss'],
    providers: [SoruService]
})
export class FirstComponent implements OnInit {
    public soruLst : [SoruModel];

    constructor( private soruServis : SoruService ) { }

    ngOnInit(){
        this.soruServis.getirSoruLst().subscribe( veri => {
            this.soruLst = veri as [SoruModel];
        })
    }

    //// MAKE SOME CHANGES ON "soruLst" locally 

    // Send updated 'soruLst' to service 
    updateSoruLst(){
        this.soruServis.updateSoruLst(this.soruLst);
    }

}

我的服务:

import { Injectable } from '@angular/core'; …