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

Question

我需要使用 ReactiveForms，[formGroup] 和 formGroupName="field"

<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，我尝试设置一个默认值：

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。

知道我应该怎么做吗？

Answer 1

  dateIni: ['', Validators.required],

你需要在这里输入你的初始值，比如

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

格式正确

Answer 2

我遇到了同样的问题并使用以下代码片段解决了


    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

How should I initialize ngbDatepicker with formControlName instead of [(ngmodel)]

ng-bootstrap

angular