相关疑难解决方法(0)

我是 angular6 的新手，当我将参数从组件发送到服务时，我收到 StaticInjectorError。怎么了？

我的代码是这样的组件：

import { Component, Input, OnInit } from '@angular/core';
import { myService } from '../../@core/data/myService';
@Component({
  selector: 'table',
  templateUrl: './table.component.html'
})
export class TableComponent implements OnInit {
  constructor(private service: myService) {
  }
  ngOnInit() {
    this.service = new myService ("name");
}

服务：

 import { Injectable, Inject } from '@angular/core';
    import { Observable } from 'rxjs/Observable';
    import { DataService } from './data.service';

    @Injectable() export class myService {

        constructor(
            entityName: string,
        ) {
            console.log(entityName);
        }
    }

app.module.ts:

import { …

我正在尝试将字符串注入我的角度组件.下面的代码工作正常,但它给出了弃用警告: 不推荐使用get:从v4.0.0开始使用Type或InjectionToken

@Component({
  selector: 'app-label',
  templateUrl: './label.component.html',
  styleUrls: ['./label.component.scss']
})
export class LabelComponent {
  public name: string;
  public caption: string;
  constructor(
    private injector: Injector
  ) {
    this.name = this.injector.get('name');
    this.caption = this.injector.get('caption');
  }
}

因此我尝试使用这个非常简短 且不完整的文档Angular 5 Injector来提出类似下面的内容,但是我不想useValue或者useClass,我需要的是注入的实际值.

    class BS { }
    // [..]
    const name = new InjectionToken<string>('name');
    const caption = new InjectionToken<string>('caption');
    const injector = ReflectiveInjector.resolveAndCreate([
      { provide: name, useClass: BS},
      { provide: caption, useClass: BS}
    ]);
    this.name = this.injector.get(name);
    this.caption = …