flutter how can i cast String to TextEditingController

Question

hi i'm looking for a way to cast String variable into TextEditingController

  final TextEditingController _testController=TextEditingController();

and this is what i'm doing

var test = "_"+"testController"

and inside TextFormField Controller i'm calling controller like this

TextFormField(
controller: test,
),

I know i could've just called it by the name of TextEditingController _testController but i have to do it this way, any ideas how ? i tried casting the variable to TextEditingController but i get this error saying that

type 'String' is not a subtype of type 'TextEditingController' in type cast

Do you want your _testController's text to be the string inside test variable? — Payam Asefi, Feb 10 '22 at 20:16
no i want to call the controller which name is _testController by a string variable var test='_testController ' — Wassef Hassine, Feb 10 '22 at 20:22
So basically yo want to determine the controller based on the test variable? you cannot cast it but you can create a method to return a controller based on the text — Payam Asefi, Feb 10 '22 at 20:26
just a basic switch case, right ? no need for extension method ? — Wassef Hassine, Feb 10 '22 at 20:35
i think it's better if i made an extension method since i have 28 TextEditingController, i'm wondering if you could help me implement the method since I'm not very familiar of it's implementation, please — Wassef Hassine, Feb 10 '22 at 20:42
Consider creating a Map or a List with all those TextEditingControllers. — Dani3le_, Feb 10 '22 at 21:18

score 0 · Answer 1 · answered Feb 10 '22 at 21:25

As you mentioned in the comments you have 28 TextEditingControllers.

You could get access to the right one by creating a Map.

var test = "_"+"testController"
final TextEditingController _testController=TextEditingController();
final TextEditingController _nameController=TextEditingController(); //Second controller

Map<String, TextEditingController> textMap = {'_testController': _testController, '_nameController': _nameController}; //Map declaration

and then use it as:

    TextFormField(
     controller: textMap[test], //Access to the right controller by String Key
     ),

flutter how can i cast String to TextEditingController

1 Answers1