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The Following Service to Author.service.ts author.service.ts import { Injectable } from '@angular/core' ; import { Author } from './author.model' ; import { Http , Response , Headers , RequestOptions } from '@angular/http' ; import 'rxjs/add/operator/map' ; import 'rxjs/add/operator/toPromise' ; import 'rxjs/Rx' ; import { map } from 'rxjs/operators' ; import { NgForm } from '@angular/forms' ; @ Injectable () export class AuthorService { selectedAuthor : Author ; authorlist : Author []; constructor ( private http : Http ) { } PostAuthor ( obj ) { // const body :Author={ //   id:obj.id, //   FirstName:obj.FirstName, //   LastName:obj.LastName // } var headeroptions = new Headers ({ 'Content-Type' : 'application/json' }); var requestOptions = new RequestOptions ({ method: RequestMethod . Post , headers : headeroptions ...
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