为什么我会在 angular 中得到 StaticInjectorError 6. 这意味着什么

Question

我的路由结构

应用-> 主-> 仪表板

我正在尝试实现这个 in dashboard.component.ts 但它在下面显示错误我不明白为什么

谁能帮我完成这件事？

core.js:1624 ERROR Error: Uncaught (in promise): Error: StaticInjectorError(AppModule)[DashboardComponent -> FileUploader]: StaticInjectorError(Platform: core)[DashboardComponent -> FileUploader]: NullInjectorError: No provider for FileUploader! Error: StaticInjectorError(AppModule)[DashboardComponent -> FileUploader]: StaticInjectorError(Platform: core)[DashboardComponent -> FileUploader]: NullInjectorError: No provider for FileUploader! at NullInjector.push../node_modules/@angular/core/fesm5/core.js.NullInjector.get (core.js:1034) at resolveToken (core.js:1273) at tryResolveToken (core.js:1218) at StaticInjector.push../node_modules/@angular/core/fesm5/core.js.StaticInjector.get (core.js:1113) at resolveToken (core.js:1273) at tryResolveToken (core.js:1218) at StaticInjector.push../node_modules/@angular/core/fesm5/core.js.StaticInjector.get (core.js:1113) at resolveNgModuleDep (core.js:8168) at NgModuleRef_.push../node_modules/@angular/core/fesm5/core.js.NgModuleRef_.get (core.js:8856) at resolveDep (core.js:9221) at NullInjector.push../node_modules/@angular/core/fesm5/core.js.NullInjector.get (core.js:1034) at resolveToken (core.js:1273) at tryResolveToken (core.js:1218) at StaticInjector.push../node_modules/@angular/core/fesm5/core.js.StaticInjector.get (core.js:1113) at resolveToken (core.js:1273) at tryResolveToken (core.js:1218) at StaticInjector.push../node_modules/@angular/core/fesm5/core.js.StaticInjector.get (core.js:1113) at resolveNgModuleDep (core.js:8168) at NgModuleRef_.push../node_modules/@angular/core/fesm5/core.js.NgModuleRef_.get (core.js:8856) at resolveDep (core.js:9221) at resolvePromise (zone.js:814) at resolvePromise (zone.js:771) at zone.js:873 at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js:421) at Object.onInvokeTask (core.js:3748) at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js:420) at Zone.push../node_modules/zone.js/dist/zone.js.Zone.runTask (zone.js:188) at drainMicroTaskQueue (zone.js:595) at ZoneTask.push../node_modules/zone.js/dist/zone.js.ZoneTask.invokeTask [as invoke] (zone.js:500) at invokeTask (zone.js:1540)```

谢谢 苏里亚 Teja.K

Answer 1

必须提供

FileUploader 服务 - 将其添加到 AppModule 的 providers 列表中。

如果你不这样做，Angular 将不知道如何在你的组件中注入它的一个实例，因此，它会抱怨 NullInjectorError