Question

我需要使用带有[formGroup]和formGroupName="field"

的ReactiveForms

<form [formGroup]="generalForm" (ngSubmit)="onSubmit()">
  <input class="form-control" placeholder="yyyy-mm-dd" 
  formControlName="dateIni" ngbDatepicker #a="ngbDatepicker">
</form>

Component.ts

generalForm: FormGroup;

ngOnInit() {
this.generalForm = this.formBuilder.group({
  name: ['', Validators.required],
  dateIni: ['', Validators.required],
  dateFin: ['', Validators.required],
  registerDateLimit: ['', Validators.required],
});

}

在我的代码中，我尝试设置默认值：

public dateIni: { year: 2017, month: 8, day: 8 };

或

@Input() dateIni: { year: 2017, month: 8, day: 8 };

但它没有采用默认值，所有文档仅提及模板表单的情况。

任何想法我应该怎么做？

Answer 1

  dateIni: ['', Validators.required],

你需要把你的初始值放在这里

 dateIni: ['2014-01-01', Validators.required],

格式正确

Answer 2

我也遇到了同样的问题，并使用下面的代码片段解决了

import { Component, OnInit, EventEmitter } from '@angular/core';
import { FormBuilder, Validators, FormArray, FormGroup } from '@angular/forms';
import { DatePipe } from '@angular/common';

@Component({
  selector: 'app-profile',
  templateUrl: './profile.component.html',
  styleUrls: ['./profile.component.css']
})
export class ProfileComponent implements OnInit {

 generalForm: FormGroup;

constructor(
    private fb: FormBuilder,
    private datePipe: DatePipe) { }

ngOnInit() {

   this.intilizeForm();

    const dateIni = "2018-12-08"
    const iniYear =  Number(this.datePipe.transform(dateIni, 'yyyy'));
    const iniMonth =  Number(this.datePipe.transform(dateIni, 'MM'));
    const iniDay =  Number(this.datePipe.transform(dateIni, 'dd'));
    this.generalForm.controls.dateIni.setValue({
      year: iniYear ,
      month: iniMonth ,
      day: iniDay
    });

}

  intilizeForm(): void {
  // Here also we can set the intial value Like dateIni:[ {year:2018,month:08, day: 12}, ..... 
    this.generalForm = this.fb.group({
       name: ['', Validators.required],
       dateIni: ['', Validators.required],
       dateFin: ['', Validators.required],
       registerDateLimit: ['', Validators.required],

    });

  }

我应该如何使用formControlName而不是[（ngmodel）]初始化ngbDatepicker

2 个答案: