1
我想在FormGroup中設置值。我的角度版本是rc-5。這是我的組件;在Angular2 FormGroup中設置值
import { Component, Input, OnInit } from '@angular/core';
import { Subscription } from 'rxjs/Subscription';
import { Router, ActivatedRoute } from '@angular/router';
import { FormGroup, FormControl, Validators, FormBuilder } from '@angular/forms';
@Component({
templateUrl: 'myHtmlPage.html',
providers: [
UserService
]
})
export class UserDetailComponent implements OnInit {
user: User;
userDetailForm: FormGroup;
constructor(private userService: UserService, private route: ActivatedRoute, private formBuilder: FormBuilder) {
this.userDetailForm = this.formBuilder.group({
email: new FormControl('', [<any>Validators.required])
});
}
getUser(id: number) {
this.userService.getById(id)
.subscribe((res) => { this.user = res.data; }, /*do stg*/,() => { this.userDetailForm.controls['email'].setValue(this.user.email); });
}
ngOnInit() {
let id;
this.route.params.subscribe(params => id = +params['id']);
this.getUser(id);
}
//...
}
而這裏是我的html;
<form [formGroup]="userDetailForm" (ngSubmit)="editUser(userDetailForm.value)">
<div class="card card-inverse col-md-6 offset-md-3" style="background-color: #333; border-color: #333;">
<div class="card-block">
<h4 class="card-title row">
Details
</h4>
<div class="form-group row">
<div>
<label for="email" class="card-subtitle">Email</label>
<div>
<input class="form-control" type="text" id="email" formControlName="email" />
</div>
</div>
</div>
</div>
</div>
我的 '用戶' 類;
export class User {
email: string;
}
這段代碼沒有問題,它工作正常。但是如果我想添加一些屬性到'用戶'類呢?我應該在'onCompleted'回調中每次像這樣設置值嗎?當我從構造函數代碼移動訂閱的「onCompleted」回調,我得到以下錯誤:
form group expects a form group instance. please pass one in
當我從構造到「ngOnInit」的方法移動代碼,它不能因爲訂閱作品異步獲取的this.user.email
值。有人幫我嗎?
this.form = this.formBuilder.group({email='[email protected]」 //然後其他屬性}) – rashfmnb
我已經嘗試過在你的解決方案 'onCompleted' 回調。正如我所說的那樣,它會拋出一個錯誤「form group expect ....」。它以我的方式工作,但我問這是否有更好的解決方案? @rashfmnb – ulubeyn