无法将值修补到 FormArray resultList。
任何人都可以请解释我，我错过了什么？
TS 文件：
import { Component, OnInit } from '@angular/core';
import { Student } from '../student';
import { FormGroup, FormControl, Validators, FormArray } from '@angular/forms';
@Component({
selector: 'app-container',
templateUrl: './container.component.html',
styleUrls: ['./container.component.css']
})
export class ContainerComponent implements OnInit {
studList: Student[] = [];
myform: FormGroup = new FormGroup({
firstName: new FormControl('', [Validators.required, Validators.minLength(4)]),
lastName: new FormControl(),
gender: new FormControl('male'),
dob: new FormControl(),
qualification: new FormControl(),
resultList: new FormArray([])
});
onSave() {
let stud: Student = new Student();
stud.firstName = this.myform.get('firstName').value;
stud.lastName = this.myform.get('lastName').value;
stud.gender = this.myform.get('gender').value;
stud.dob = this.myform.get('dob').value;
stud.qualification = this.myform.get('qualification').value;
this.studList.push(stud);
this.myform.controls.resultList.patchValue(this.studList);
console.log(JSON.stringify(this.studList));
}
ngOnInit() {
}
}
模型：
export class Student {
public firstName: String;
public lastName: string;
public gender: string;
public dob: string;
public qualification: string;
}
HTML：
<div class="container">
<h3>Striped Rows</h3>
<table class="table table-striped" formArrayName="resultList">
<thead>
<tr>
<th>Firstname</th>
</tr>
</thead>
<tbody>
<tr *ngFor="let item of myform.controls.resultList.controls; let i = index" [formGroupName]="i">
<td><p formControlName="firstName"></p></td>
</tr>
</tbody>
</table>
</div>
这个.studList JSON：
[
{
"firstName":"santosh",
"lastName":"jadi",
"gender":"male",
"dob":"2018-03-31T18:30:00.000Z",
"qualification":"BE"
},
{
"firstName":"santosh",
"lastName":"jadi",
"gender":"male",
"dob":"2018-03-31T18:30:00.000Z",
"qualification":"BE"
}
]