犯错误- NullInjectorError:没有NgRedux的提供者！集成redux实现时

Question

我正在修改现有的项目以实现redux实现。进行代码更改，并在编译时发现以下错误。根据我所提到的学习材料，ngRedux不需要添加到提供者中。将其添加到提供程序后，仍然会出现错误。

 **AppModule.ts**
    //Activation of store.
    import {NgRedux , NgReduxModule} from '@angular-redux/store';
    import {IAppState,INITIAL_STATE,rootReducer} from '../store';
    //Other Imports here 
    @NgModule({
      declarations: [
        AppComponent,
        ViewallComponent,
        WorkoutComponent,
        CategoryComponent,
        TrackComponent,
        TestComponent,
        CategoryPipe,
        ActiveworkoutComponent,
        WorkoutPipe,
      ],
      imports: [
        BrowserModule,
        AppRoutingModule,
        FormsModule,
        ReactiveFormsModule,
        HttpModule,
        FusionChartsModule.forRoot(FusionCharts, Charts, FintTheme)
      ],
      providers: [
        WorkoutService,
        CategoryService,
        ActiveworkoutService
      ],
      bootstrap: [AppComponent]

    })

    export class AppModule { 
      constructor (ngRedux: NgRedux<IAppState>) {
           ngRedux.configureStore(rootReducer, INITIAL_STATE);
        }

    }

对组件进行了适当的更改，并制作了存储文件。

错误：

Error: StaticInjectorError(AppModule)[AppModule -> NgRedux]: 
  StaticInjectorError(Platform: core)[AppModule -> NgRedux]: 
    NullInjectorError: No provider for NgRedux!
Stack trace:
./node_modules/@angular/core/fesm5/core.js/NullInjector.prototype.get@http://localhost:4200/vendor.js:33896:19
resolveToken@http://localhost:4200/vendor.js:34133:17
tryResolveToken@http://localhost:4200/vendor.js:34077:16
./node_modules/@angular/core/fesm5/core.js/StaticInjector.prototype.get@http://localhost:4200/vendor.js:33974:20
resolveToken@http://localhost:4200/vendor.js:34133:17
tryResolveToken@http://localhost:4200/vendor.js:34077:16`enter code here`

Answer 1

您需要在导入NgReduxModule下添加module.ts

imports: [
    NgReduxModule
]