没有ControlContainer的提供者 - Angular 5

Question

我正在将购买的第三方模板转换为Angular 5应用程序,并且遇到了错误.我对Angular 5很新(但我知道AngularJS很好)并且不明白它试图告诉我什么？它似乎与显示/隐藏顶部导航栏的按钮有关.

错误消息(来自浏览器):

Error: Template parse errors:
No provider for ControlContainer ("imalize-styl-2 btn btn-primary " (click)="toggleNavigation()"><i class="fa fa-bars"></i> </a>
      [ERROR ->]<form role="search" class="navbar-form-custom" method="post" action="#">
        <div class="form-gro"): ng:///AppModule/TopNavigationNavbarComponent.html@4:6

component.html:

<div class="row border-bottom">
  <nav class="navbar navbar-static-top" role="navigation" style="margin-bottom: 0">
    <div class="navbar-header">
      <a class="minimalize-styl-2 btn btn-primary " (click)="toggleNavigation()"><i class="fa fa-bars"></i> </a>
      <form role="search" class="navbar-form-custom" method="post" action="#">
        <div class="form-group">
          <input type="text" placeholder="Search for something..." class="form-control" name="top-search" id="top-search">
        </div>
      </form>
    </div>
    <ul class="nav navbar-top-links navbar-right">
      <li>
        <a href="#">
          <i class="fa fa-sign-out"></i> Log out
        </a>
      </li>
    </ul>
  </nav>
</div>

component.ts

import { Component, OnInit } from '@angular/core';
import { smoothlyMenu } from '../../../app.helpers';

declare var jQuery: any;

@Component({
  selector: 'app-top-navigation-navbar',
  templateUrl: './top-navigation-navbar.component.html',
  styleUrls: ['./top-navigation-navbar.component.less']
})
export class TopNavigationNavbarComponent implements OnInit {

  toggleNavigation(): void {
    jQuery('body').toggleClass('mini-navbar');
    smoothlyMenu();
  }

  constructor() { }

  ngOnInit() {
  }

}

app.module.ts(当我谷歌这个时,这似乎是一个很多提到的东西,但不是表格抛出错误.)

...
import { ReactiveFormsModule, FormControl, FormsModule } from '@angular/forms';
...

Answer 1

除了ReactiveFormsModule之外,还要导入FormsModule

Answer 2

我不确定为什么错误似乎指向表单元素之外的锚标记,但它是导致错误的表单元素.将FormGroup添加到表单修复了问题.

<form role="search" class="navbar-form-custom" [formGroup]="form">

Answer 3

文件中的Import FormsModule和ReactiveFormsModule views.module.ts适用于我:

views.module.ts

import { NgModule, NO_ERRORS_SCHEMA } from '@angular/core';
import { CommonModule } from '@angular/common';
import { RouterModule } from '@angular/router';
import { FormsModule, ReactiveFormsModule } from '@angular/forms';


@NgModule({
  imports: [
    CommonModule,
    RouterModule,
    FormsModule,
    ReactiveFormsModule,
    ...
  ],
  declarations: [
    ...
  ],
  exports: [
   ...
  ],
  schemas: [NO_ERRORS_SCHEMA]
})
export class ViewsModule { }

Answer 4

编辑文件“app.module.ts”；更改以下指令：

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

具有以下内容：

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

更改以下代码段：

  imports: [
    BrowserModule,
    ReactiveFormsModule
  ],

具有以下内容：

  imports: [
    BrowserModule,
    ReactiveFormsModule,
    FormsModule
  ],

Answer 5

如果您尝试从 Angular 组件显示纯 HTML 表单，请使用像这样的ngNoFormin<form>标记。

<form ngNoForm>
...
</form>

这应该可以防止 Angular 抛出控制容器错误。