lifecycle - What is the best method to update a components data from a data change in another component? Angular 2 -


so basically, have made generic component displays objects data. data sent via button click. generic component reads data during oninit life cycle hook looks this. 

  ngoninit() {     this.settingsservice.getallsettings().responsedata()         .subscribe(settingsstream => { this.settingslist = settingsstream.result }, (err) => {             // error messages         },         () => {             // complete messages             this.currentsetting = this.settingslist                 .findindex(setting => setting.configurationname === this.settingsservice.selectedsetting.selectconfig);         }) }

once has found configuration name , matches selected name. displays correct value in template so.

<input size="150" [value]="settingslist[currentsetting].configurationname" [(ngmodel)]="settingslist[currentsetting].configurationname">


however generic components data can changed via button click. because generic component reads data during oninit not change data displays. have tried using onchanges , docheck lifecycle hook not allow me alter data looking changes.

this method in template activates , displays component button click

      <div *ngfor="let settings of settingslist"> <button class="btn btn-secondary"   (click)="changesection(settings.configurationname)"  (click)="domelement='generic'"> {{settings.configurationname}} </button> </div>  <div *ngif="shownewconfig"> <new-config> </new-config>

i had working separate components seems inefficient , duplication of code.

all appreciated many thanks!

i may misunderstood looking for, cannot put in comment:

ngoninit(){       loaddata()     }  loaddata(){    this.settingsservice.getallsettings().responsedata()..... }  <button (click)="loaddata()">load</button>

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