how to modify a String from a Textfield before validated using validator?

Question

I am using form field validator, I think it will be the same if using normal TextField, and I have form field like this

  TextFormField(  
    onChanged: (val) => selectedEmail = val,  
    validator: EmailValidator(errorText: "Email is not valid"),  
  )

unfortunately, my user sometimes unintentionally will put an empty string at the end of email string like this :

"[email protected] "

as you can see, I have email validator here, but the email validator will consider the string with empty space like that as an invalid email.

I want to remove or trim the email string first before it is validated by the EmailValidator, how to do that?

Did you try string.trim()?

Md. Kamrul Amin
– Md. Kamrul Amin

2022-09-21 04:34:33 +00:00
Commented Sep 21, 2022 at 4:34 — Md. Kamrul Amin
– Md. Kamrul Amin, Commented Sep 21, 2022 at 4:34

Jenis Navadiya · Accepted Answer · 2022-09-21 04:46:17Z

1

  TextFormField(  
    onChanged: (val) => selectedEmail = val,  
    validator: EmailValidator(errorText: "Email is not valid"),  
        inputFormatters: [FilteringTextInputFormatter.deny(RegExp(r'\s'))]

  )

FilteringTextInputFormatter.deny(RegExp(r'\s')) it's deny white space in the TextFormField

edited Sep 21, 2022 at 4:46

answered Sep 21, 2022 at 4:41

Jenis Navadiya

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Comments

Harsh Sureja · Accepted Answer · 2022-09-21 04:38:36Z

0

It could be helpful.

TextFormField(  
    onChanged: (val) => selectedEmail.trim() = val.trim(),  
    validator: EmailValidator(errorText: "Email is not valid"),  
  )

answered Sep 21, 2022 at 4:38

Harsh Sureja

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