设置值以形成对Init不起作用的控制

Question

I have following code to add control in OnInit method.

    this.form = new FormGroup({});
    this.form.addControl('select', new FormControl(''));   

after adding the control i am not able set the value to control;

    this.form.controls['select'].SetValue()

but its throwing exception as select as undefined

Answer 1

您是否使用formGroup get方法检查了相同formGroup ：

this.form.get('select').setValue('');