[英]Angular getting from forms arrays
我正在 angular 6 中制作 CRUD 應用程序,但是當我去編輯頁面時,我想將數據從數組傳遞到該頁面上的輸入字段,但是當我保存該頁面時,數據應該再次出現在數組中(您可以在圖片上看到) 因為我必須像數組一樣保存它。 我也嘗試過使用 contact.email[i] 但在那之后我不知道如何將它們放在一個數組中,那就是email 。 任何人都可以幫我解決這個問題嗎? 這是我的圖片,我想看起來像這樣,我的代碼...
//Edit page component
export class EditComponent implements OnInit {
contact$: Observable<IContact>;
contactForm = this.fb.group({});
formSubmitted = false;
constructor( private contactService: ContactService,
private route: ActivatedRoute,
private router: Router,
private fb: FormBuilder) {}
ngOnInit() {
this.contactForm.addControl('first_name', new FormControl(''),[Validators.required]);
this.contactForm.addControl('last_name', new FormControl(''));
this.contactForm.addControl('email', new FormControl('', [Validators.required]));
this.contactForm.addControl('phone', new FormControl('', [Validators.required]));
this.contactForm.addControl('id', new FormControl(''));
//getting id from url from home page and subscibe it to new contact$
this.contact$ = this.route.paramMap.pipe(
switchMap((params: ParamMap) =>
this.contactService.getContactById(Number.parseInt(params.get('id')))));
this.contact$.subscribe(contact => {
if(!isNullOrUndefined(contact)){
console.log(contact);
this.contactForm.get('first_name').setValue(contact.first_name);
this.contactForm.get('last_name').setValue(contact.last_name);
this.contactForm.get('phone').setValue(contact.phone);
this.contactForm.get('id').setValue(contact.id);
**//i want to take separate this array and put it in the 2 array then again put back into one when i**
want to save it
this.contactForm.get('email').setValue(contact.email);
};
});
};
save($event):void{
if(!this.contactForm.valid){
return;
};
this.formSubmitted = true;
this.saveContact();
this.router.navigate((['/home']));
};
private saveContact(){
const contact$ = new Contact();
contact$.id = this.contactForm.get('id').value;
contact$.first_name = this.contactForm.get('first_name').value;
contact$.last_name = this.contactForm.get('last_name').value;
contact$.email = this.contactForm.get('email').value;
contact$.phone = this.contactForm.get('phone').value;
if(contact$.id == 0){
this.contactService.addNewContact(contact$);
}else {
this.contactService.updateContact(contact$);
}
};
}
<!-- this is my html Edit page code -->
<div> <!-- this input works but i dont know how to get others to work as well -->
<input class="email"
placeholder="E-mail"
type="email"
name="email"
formControlName = 'email'>
<div>
<div>
<input
class="email"
placeholder="E-mail"
type="email"
name="email"
formControlName='email'>
<input
class="email"
placeholder="E-mail-3"
type="email"
name="email"
formControlName='email'>
</div>
</div>
</div>
[1]: https://i.stack.imgur.com/SfrBL.jpg
您應該將FormArray
用於電子郵件列表。
ngOnInit() {
this.contactForm.addControl('first_name', new FormControl(''));
this.contactForm.addControl('last_name', new FormControl(''));
this.contactForm.addControl('email_list', new FormArray([]));
this.contactForm.patchValue(this.DATA);
const control = this.emailFormArray;
control.controls = [];
this.DATA.email_list.forEach(x => {
control.push(
this.fb.group({
email: x,
})
)
});
}
請檢查我制作的這個 Stackblitz 示例: https ://stackblitz.com/edit/angular-o2hox7
進行一些更改,提交表單並在控制台中檢查結果。
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