Angular 没有日志服务提供商？

这是我的日志服务：

/* * * ./app/comments/components/comment.service.ts * * */
// Imports
import { Injectable }     from '@angular/core';
import { Http, Response, Headers, RequestOptions } from '@angular/http';
import { Log }           from '../model/log.model';
import {Observable} from 'rxjs/Rx';

// Import RxJs required methods
import 'rxjs/add/operator/map';
import 'rxjs/add/operator/catch';

@Injectable()
export class LogService {
     userData: any;
     private date;
     // Resolve HTTP using the constructor
     constructor (private http: Http) {}

 CheckIn (body): Observable<Log[]> {
         this.date =  new Date();
        //let bodyString = JSON.stringify(body); // Stringify payload
        var bodyString = 'user_email='+body.email +'&checkin='+this.date;

        let headers = new Headers({ 'Content-Type': 'application/x-www-form-urlencoded'});

        let options = new RequestOptions({ headers: headers }); // Create a request option

        return this.http.post('/checkin', bodyString, options) // ...using post request
                         .map(response => { return response.json()}) // ...and calling .json() on the response to return data
                         .catch((error:any) => Observable.throw(error.json().error || 'Server error' )); //...errors if any
    }


}

这是我的日志组件：

import {Component, EventEmitter, Input, OnChanges,OnInit} from '@angular/core';
import {Observable} from 'rxjs/Rx';
import {Router} from '@angular/router';
import { LogService } from '../services/logService.service';
import {User,SharedService} from '../../SharedService'
@Component({
    selector: 'dashboard',
    template: `
    <div class="container">
        <div class="row">
            <div class="col-md-10 col-md-offset-1">
                <div class="panel panel-default">
                    <div class="panel-heading">Dashboard</div>

                    <div class="panel-body">
                        You are logged in! Welcome <span>{{ user.name }} </span>

                    </div>
                    <button *ngIf="checking" type="submit" class="btn btn-primary btn-block" click)="checkout(user.email)">Checkout</button>
                    <button *ngIf="!checking" type="submit" class="btn btn-warning btn-block" (click)="checkin(user.email)">Checkin</button>
                </div>
            </div>
        </div>
    </div>
 `
})
export class LogsComponent {
 private checking = false;
 user:User;
 constructor(
     private logService: LogService,
     private router: Router,
     private ss:SharedService
     ){
        this.user=ss.getUserDetail();
     }

 checkin(values){

   var current = this;
   // Variable to hold a reference of addComment/updateComment
   let logOperation:Observable<any>;
   logOperation = this.logService.CheckIn(values);
   logOperation.subscribe(
     res => {
       if(res.isLoggedIn == true){
         console.log('usao u res',res.user)
         this.ss.setUserDetail(res.user);
          current.router.navigate(['/home']);
       }
      },
     err => { console.log(err) }

  );
  }

}

从'@angular/core'导入{Component，EventEmitter，Input，OnChanges，OnInit}；
从'rxjs/Rx'导入{Observable}；
从'@angular/Router'导入{Router}；
从“../services/LogService.service”导入{LogService}；
从“../../SharedService”导入{User，SharedService}
@组成部分({
选择器：“仪表板”，
模板：`
仪表板
您已登录！欢迎{{user.name}
结账
签到
`
})
导出类日志组件{
私人检查=假；
用户：用户；
建造师(
私人日志服务：日志服务，
专用路由器：路由器，
私有ss:SharedService
){
this.user=ss.getUserDetail（）；
}
签入（值）{
无功电流=此；
//用于保存addComment/updateComment引用的变量
让logOperation：可观察的；
logOperation=this.logService.CheckIn（值）；
logOperation.subscribe(
res=>{
如果（res.isLoggedIn==true）{
console.log（'usao u res'，res.user）
这个.ss.setUserDetail（res.user）；
current.router.navigate（['/home']）；
}
},
err=>{console.log（err）}
);
}
}

---

有什么建议说明我为什么会出现这个错误吗？

您是否在其他组件中使用了

LogService

。没有。。仅在日志组件中尝试将其添加到

@Component.providers

arraynow我得到这个：self.parent.context.checkin不是一个函数。。这是另一个问题还是？我不知道，

LogModule

是根模块吗？

import {Component, EventEmitter, Input, OnChanges,OnInit} from '@angular/core';
import {Observable} from 'rxjs/Rx';
import {Router} from '@angular/router';
import { LogService } from '../services/logService.service';
import {User,SharedService} from '../../SharedService'
@Component({
    selector: 'dashboard',
    template: `
    <div class="container">
        <div class="row">
            <div class="col-md-10 col-md-offset-1">
                <div class="panel panel-default">
                    <div class="panel-heading">Dashboard</div>

                    <div class="panel-body">
                        You are logged in! Welcome <span>{{ user.name }} </span>

                    </div>
                    <button *ngIf="checking" type="submit" class="btn btn-primary btn-block" click)="checkout(user.email)">Checkout</button>
                    <button *ngIf="!checking" type="submit" class="btn btn-warning btn-block" (click)="checkin(user.email)">Checkin</button>
                </div>
            </div>
        </div>
    </div>
 `
})
export class LogsComponent {
 private checking = false;
 user:User;
 constructor(
     private logService: LogService,
     private router: Router,
     private ss:SharedService
     ){
        this.user=ss.getUserDetail();
     }

 checkin(values){

   var current = this;
   // Variable to hold a reference of addComment/updateComment
   let logOperation:Observable<any>;
   logOperation = this.logService.CheckIn(values);
   logOperation.subscribe(
     res => {
       if(res.isLoggedIn == true){
         console.log('usao u res',res.user)
         this.ss.setUserDetail(res.user);
          current.router.navigate(['/home']);
       }
      },
     err => { console.log(err) }

  );
  }

}