convert string to enum Value in angular 8

Question

i need to pass enum type to server . but when i send the form to server it send enum fild by type string .

this is my enum :

export enum PayTypes {
  Free,
  Subscribe
}

and this is my form :

createForm(): void {
    this.lessonAddForm = new FormGroup({
        payType: new FormControl('', Validators.required),
    });
}


addLesson(): void {
    const payString = PayTypes[this.lessonAddForm.controls['payType'].value];
    const payType: PayTypes = PayTypes[payString];
    this.lessonAdd = this.lessonAddForm.value;
    this.lessonAdd.payType = payType;
    this.subscriptions = this.lessonService
        .add(this.lessonAdd)
        .subscribe(
            res => {
                if (res.success === true) {
                    this.alertService.success('', 'GENERAL.ADD_SUCCESS');
                    this.backToMenu();
                }
            }
        );
}

and i try for convert string to enum by this way :

    const payString = PayTypes[this.lessonAddForm.controls['payType'].value];
    const payType: PayTypes = PayTypes[payString];
    this.lessonAdd = this.lessonAddForm.value;
    this.lessonAdd.payType = payType;

but it not work .

How can i solve this Problem????

Does this answer your question? How do I convert a string to enum in TypeScript? — Prashant Pimpale
– Prashant Pimpale, Commented Nov 25, 2019 at 7:00

Prashant Pimpale · Accepted Answer · 2019-11-26 05:28:55Z

4

You must convert the value inside the square bracket to string like this

const payType: PayTypes = PayTypes[payString.toString()];

Also you can view this post

Update: Check how you get payString data does it match with your enum definition ? Please note your payString data have to be the same with your enum key

For example:

PayTypes['Free'] // This will work

And

PayTypes['free'] // This won't

edited Nov 26, 2019 at 5:28

Prashant Pimpale

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answered Nov 25, 2019 at 6:52

Tony

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3 Comments

kianoush dortaj Over a year ago

still send it string

Prashant Pimpale Over a year ago

@kianoushdortaj working fine here!

Tony Over a year ago

@kianoushdortaj check my answer again

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