CODEWITHSUNDEEP
dartflutter
Farwa
Farwa

Reputation: 7024

How to limit number of characters in TextFormField?

Is there a way in dart language to keep the maximum input length fixed in TextFormField?

Upvotes: 36

Views: 42924

Answers (5)

PK Chahar
PK Chahar

Reputation: 111

try with the below code, here is one TextFormField where I'm taking a mobile number with max 10 digits

TextFormField(inputFormatters: [LengthLimitingTextInputFormatter(10)]) 
// replace your max length instead of 10

Upvotes: 0

polis
polis

Reputation: 933

Additionally to hahnsaja answer after you add maxLength - counter appears at the bottom of the TextFormField widget. To be able to hide it, add this to InputDecoration :

counterText: '',
counterStyle: TextStyle(fontSize: 0),

Example:

TextFormField(
  controller: _deskripsiController,
  onFieldSubmitted: (String value){
        setState(() {
          _deskripsiController.text = value;
        });
  },
  decoration: const InputDecoration(
        border: const UnderlineInputBorder(),
        labelText: "Deskripsi",
        counterText: '',
        counterStyle: TextStyle(fontSize: 0),
  ),
  maxLength: 8,
)

Upvotes: 3

Mehrdad
Mehrdad

Reputation: 1637

best way is inputFormatters option:

inputFormatters: [
   new LengthLimitingTextInputFormatter(11),// for mobile 
],

Upvotes: 6

Hanhan
Hanhan

Reputation: 1339

use maxLength

TextFormField(
  controller: _deskripsiController,
  onFieldSubmitted: (String value){
        setState(() {
          _deskripsiController.text = value;
        });
  },
  decoration: const InputDecoration(
        border: const UnderlineInputBorder(),
        labelText: "Deskripsi",
  ),
  maxLength: 8,
)

Upvotes: 30

Rémi Rousselet
Rémi Rousselet

Reputation: 277027

Use inputFormatters property. The following code would limit the textFormField to 42 in length : 

new TextFormField(
  inputFormatters: [
    new LengthLimitingTextInputFormatter(42),
  ],
);

UPDATE: Import the package first. import 'package:flutter/services.dart';

Upvotes: 94

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