由模块“AppModule”导入的意外值“FormBuilder”。 请添加@NgModule 注释

Question

如何在 app.module 中添加 formbulder

模块 AppModule 导入的意外值 FormBuilder。 请添加@NgModule 注释。

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { HttpClientModule, HTTP_INTERCEPTORS } from "@angular/common/http";
import {FormBuilder, FormControl, FormGroup, Validators, FormsModule} from '@angular/forms';

    import { AppRoutingModule } from './app-routing.module';
    import { AppComponent } from './app.component';
    import { ClientComponent } from './client/client.component';
    import { ClientTaskComponent } from './clienttask/clienttask.component';
    import { ClientService } from './client/sherad/client.service';


    @NgModule({
      declarations: [
        AppComponent, ClientComponent, ClientTaskComponent, ClientService
      ],
      imports: [
        BrowserModule,
        AppRoutingModule,
        HttpClientModule,
        FormsModule,
        FormBuilder,
        FormGroup,
        FormControl
      ],
      providers: [],
      bootstrap: [AppComponent]
    })
    export class AppModule { }

Answer 1

imports数组只接受 Angular 模块。

代替

import {FormBuilder, FormControl, FormGroup, Validators, FormsModule} from '@angular/forms';

只需导入：

import {ReactiveFormsModule} from '@angular/forms';

ReactiveFormsModule是FormBuilder 、 FormControl 、 FormGroup 、 Validators等暴露的模块。 因此，要使用它们，您必须在 Angular 模块中导入ReactiveFormsModule 。

并添加仅imports数组。

@NgModule({
  declarations: [
    AppComponent, ClientComponent, ClientTaskComponent, ClientService
  ],
  imports: [
    BrowserModule,
    AppRoutingModule,
    HttpClientModule,
    FormsModule,
    ReactiveFormsModule,
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule {}

FormBuilder 、 FormControl 、 FormGroup 、 Validators等，应该只在组件/服务中导入并在那里使用。 它们在 Angular 模块文件中并不是真正需要的。

Answer 2

import { BrowserModule } from '@angular/platform-browser'; import { NgModule } from '@angular/core'; import { HttpClientModule, HTTP_INTERCEPTORS } from "@angular/common/http"; import {FormBuilder, FormControl, FormGroup, Validators, FormsModule} from '@angular/forms'; ........................///Remove this

import { FormsModule, ReactiveFormsModule } from "@angular/forms";..........//Add this

import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import { ClientComponent } from './client/client.component';
import { ClientTaskComponent } from './clienttask/clienttask.component';
import { ClientService } from './client/sherad/client.service';


@NgModule({
  declarations: [
    AppComponent, ClientComponent, ClientTaskComponent, ClientService
  ],
  imports: [
    BrowserModule,
    AppRoutingModule,
    HttpClientModule,
    FormsModule,
    FormBuilder,.........///Remove this
    FormGroup,...........///Remove this
    FormControl..........///Remove this
    ReactiveFormsModule ..........//Add this
], 
providers: [], 
bootstrap: [AppComponent] 
}) 

export class AppModule { }

并将其导入您的 .ts

import {FormBuilder, FormControl, FormGroup, Validators, FormsModule} from '@angular/forms';

永远记得在

@NgModule
(

声明仅包含组件

进口只包含模块

提供者只包含服务

Answer 3

您不能将 FormBuilder 添加到您的模块中，您只能将这些添加到您的模块中

import { FormsModule, ReactiveFormsModule } from "@angular/forms";

imports: [
    BrowserModule,
    AppRoutingModule,
    HttpClientModule,
    FormsModule,
    ReactiveFormsModule
  ],

Answer 4

在我的代码中工作的真实而简单的解决方案。 只需在该特定模块中评论这两个导入，即在我的代码 HomeModule.ts 中评论这些 //FormsModule, //FormControl