How to implement form response in Angular4

This article mainly introduces the form response function of Angular4 programming, and analyzes the specific implementation steps and related operating techniques of the Angular4 form response function in the form of examples. Friends in need can refer to the following

The examples in this article describe Angular4 form response function. Share it with everyone for your reference, the details are as follows:

Responsive form

1. The responsive form needs to be injected into the appmodule file. Form module

import { FormsModule, ReactiveFormsModule } from '@angular/forms'；
<!--
  这里引用模块的时候要注意，具体是哪个module文件使用了表单，
  因为在某些情况下表单是被appmodule下的某个子module文件使用，
  那么就要在该子module文件中引入响应式表单模块。
-->
@NgModule(
  {imports: [FormsModule, ReactiveFormsModule……]
  ……}

2, reference in form.component.ts component

First way:

import { Component } from '@angular/core';
import { FormGroup, FormControl, FormBuilder} from '@angular/forms';
@Component({
 templateUrl: 'forms.component.html'
})
export class FormsComponent {
 formModel: FormGroup;
 constructor(fb: FormBuilder) {
  this.formModel= fb.group({
   formControl1: [''],
   formControl2: [''],
   ……
  });
 }
 onSubmit () {
  console.log(this.formModel.value);
 }
}

Second way :

import { Component } from '@angular/core';
import { FormGroup, FormControl} from '@angular/forms';
@Component({
 templateUrl: 'forms.component.html'
})
export class FormsComponent {
 formModel: FormGroup; /*这里定义表单变量名，HTML文件中绑定时使用*/
 constructor() {
  this.formModel= new FormGroup({
    formControl1: new FormControl(),
    formControl2: new FormControl(),
    ……
  });
 }
 onSubmit () {
  console.log(this.formModel.value);
 }
}

3. The corresponding HTML file

<form action="" method="post" [formGroup]=&#39;formModel&#39;> <!-- 通过指令绑定ts文件中命名的变量名 --!>
  <p class="form-group row">
   <p class="col-md-6">
    <p class="row">
     <label>formControl1</label>
     <input type="text" formControlName=&#39;formControl1&#39;>
    </p>
   </p>
   <p class="col-md-6">
    <p class="row">
     <label>formControl2</label>
    <input type="text" formControlName=&#39;formControl2&#39;>
    </p>
   </p>
  </p>
</form>

The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

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