我有以下表格:
form = this.builder.group({
form2: this.builder.array([
this.builder.group({
name: new FormControl(),
surname: new FormControl(),
})
]),
});
在我的oniit中,我这样做是为了设置一个具有设置值的表单控件
this.form.controls.personNameField.setValue(this.person.name);
但这不起作用,可能是因为控件在形式数组中。但是我怎样才能访问我的形式数组控件呢?
您可以在FormArray
中添加具有值的控件,如下所示:
get form2Array(){
return this.form.controls.form2 as FormArrray;
}
// If form control exists at index
addPerson(index: number, person: any){
const personFormGroup = this.form2Array.at(index) as FormGroup
personFormGroup.setValue(person) //handle according to your code
}
// If form control does not exist at index
addPerson(index: number, person: any){
this.form2Array.at(index).setControl(index, this.builder.group({
name: this.builder.control({}),
surname: this.builder.control({}),
}))
const personFormGroup = this.form2Array.at(index) as FormGroup
personFormGroup.setValue(person) //handle according to your code
}
您可以通过以下方式访问表单控件:
ngOnInit() {
(this.form.get('form2') as FormArray).at(0).patchValue({ name: 'test' });
}
因此,我们得到父组中的formarray,然后得到formarray中的第一个formgroup(在索引0处(,并修补name
formcontrol的值。