假设我有一个创建商店的表单。我想输入它的名称,以及商店的开业日期。
因此,我将有一个带有一些输入的表单,并且我希望在一个mat- form -field中对复选框进行分组。
store-form-component.html:
<form (ngSubmit)="onSaveStore()" [formGroup]="storeForm">
<mat-form-field>
<mat-label>Store name</mat-label>
<input matInput placeholder="store name" formControlName="name" required>
</mat-form-field>
<mat-form-field [formGroup]="storeForm.controls.availableDays>
<mat-checkbox *ngFor="let availableDay of storeForm.controls.availableDays.controls; let i=index" formControlName="{{i}}">{{i}}</mat-checkbox>
</mat-form-field >
</form>
store-form-component.ts:
export class StoreFormComponent implements OnInit {
// Form Groups
storeForm: FormGroup;
constructor(
private formBuilder: FormBuilder
) {}
ngOnInit(): void {
this.initForm();
}
initForm(): void {
this.storeForm = this.formBuilder.group({
name: "",
availableDays: this.getAvailableDays()
});
}
getAvailableDays(): FormGroup {
return this.formBuilder.group({
monday: false,
tuesday: false,
wednesday: false,
thursday: false,
friday: false,
saturday: false,
sunday: false
});
}
它不工作,我不知道为什么.
编辑:感谢@g-tranter (和其他人的帖子),我可以解决这个问题。最终的代码如下所示:
store-form-component.html:
<form (ngSubmit)="onSaveStore()" [formGroup]="storeForm">
<div [formGroup]="storeForm.controls.availableDays">
<mat-checkbox *ngFor="let availableDay of days;" formControlName="{{availableDay}}">{{availableDay}}</mat-checkbox>
</div>
</form>
store-form-component.ts:
export class StoreComponent implements OnInit {
// Form Groups
storeForm: FormGroup;
days: Array<string>;
constructor(private formBuilder: FormBuilder) {}
ngOnInit(): void {
this.initForm();
// this is useful to iterate over the form group
this.days = Object.keys(this.storeForm.controls.availableDays.value);
}
initForm(): void {
this.storeForm = this.formBuilder.group({
name: "",
availableDays: this.getAvailableDays()
});
}
getAvailableDays(): FormGroup {
return this.formBuilder.group({
monday: false,
tuesday: false,
wednesday: false,
thursday: false,
friday: false,
saturday: false,
sunday: false
});
}
}
发布于 2018-06-07 23:26:48
您正在将表单控件名称设置为数字索引:
formControlName="{{i}}"
表单组中不存在的。
您需要将其设置为“星期一”等,或者设置
[formControl]="availableDay"
发布于 2018-06-07 06:05:04
https://stackoverflow.com/questions/50730205
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