<form [formGroup]="myForm">
<mat-form-field>
<input matInput placeholder="name" formControlName="name">
</mat-form-field>
<mat-form-field>
<mat-list formControlName="foldersList">
<mat-list-item *ngFor="let folder of folders"><h4 mat-line>{{folder.name}}</h4></mat-list-item>
</mat-list>
</mat-form-field>
</form>
export class MyComponent {
folders = [ { name: 'Photos', updated: new Date('1/1/16') } ];
myForm: FormGroup = this.fb.group({
name: ['', Validators.required],
foldersList:
new FormControl([]),
// new FormArray([]),
// ['', Validators. Validators.required],
// this.fb.array([], [Validators.required]),
});
constructor(private fb: FormBuilder) {}
}
Error: No value accessor for form control with name: 'foldersList'
Error: mat-form-field must contain a MatFormFieldControl.
The mat-list
and mat-selection-list
components do not implement the MatFormFieldControl
interface. Which is why they can not be used inside a mat-form-field
.
Here's a working fork of the above example: https://stackblitz.com/edit/angular-xijtrv-yzpsmj
Just replaced mat-list
with mat-selection-list
and removed the mat-form-field
that wrapped it.