Angular 5,NullInjectorError：没有服务提供者

NullInjectorError: No provider for TesteventService!

我正在使用Angular 5,angularfire2 / firestore和typescript 2.7.1

testevent.service.ts

import { Injectable } from '@angular/core';
import { AngularFirestore } from 'angularfire2/firestore'

@Injectable()
export class TesteventService {

  constructor(private afs: AngularFirestore) { }

  addEvent(eventData){
    this.afs.collection('testevent').add(eventData).then(() => {
      console.log('Done');
    })
  }

  getEvent(){
    return this.afs.collection('testevent',ref => ref.orderBy('id')).valueChanges()
  }
}

component.ts

import { Component,OnInit } from '@angular/core';
import { TesteventService } from '../../providers/testevent.service';
import { AngularFirestore } from 'angularfire2/firestore';

export class CsvImportComponent implements OnInit {
  data_rows = []

  constructor(private event: TesteventService){})

当我从TesteventSerivice添加事件时,我得到错误,而没有任何运行.