Trying to convert TextFormField - flutter

Question

I am trying to convert TextEditingController into int because I want to delete the user ID from database by using TextEditingController.
look at: (<-------) in the code to understand.
and here is my code:
import 'package:flutter/material.dart';
import 'package:untitled/database.dart';
import './model/columns.dart';
import './database.dart';
void main() {
WidgetsFlutterBinding.ensureInitialized();
runApp(MyApp());
}
class MyApp extends StatefulWidget {
#override
_MyAppState createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
#override
void dispose() {
textController.dispose();
super.dispose();
}
final textController = TextEditingController();
int? selectedId;
#override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
title: Text("App"),
),
body: Form(
child: Column(
children: [
Padding(
padding: const EdgeInsets.all(8.0),
child: TextField(
controller: textController,
decoration: InputDecoration(
labelText: "Insert row",
border: OutlineInputBorder(
borderRadius: BorderRadius.circular(25))),
),
),
ElevatedButton(
child: Icon(Icons.save),
onPressed: () async {
await DatabaseHelper.instance
.insert(Users(name: textController.text));
setState(() {
textController.clear();
});
print("Inserted!");
},
),
Padding(
padding: const EdgeInsets.all(8.0),
child: TextFormField(
//controller: selectedId, // <-------
decoration: InputDecoration(
labelText: "Delete ID",
border: OutlineInputBorder(
borderRadius: BorderRadius.circular(25))),
keyboardType: TextInputType.number,
),
),
ElevatedButton(
child: Icon(Icons.delete),
onPressed: () async {
DatabaseHelper.instance.delete(selectedId!); // <-------
},
),
ElevatedButton(
child: Text("Check all rows"),
onPressed: () async {
print(await DatabaseHelper.instance.queryAll());
},
),
],
),
)),
);
}
}

Answer 1

Create another controller then pass as the entered data as int by converting with int.parse(yourcontroller.text)
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
debugShowCheckedModeBanner: false,
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
#override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
final textController = TextEditingController();
final numberController = TextEditingController();
#override
void dispose() {
textController.dispose();
numberController.dispose();
super.dispose();
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Padding(
padding: const EdgeInsets.all(8.0),
child: TextFormField(
controller: numberController,
decoration: InputDecoration(
labelText: "Delete ID",
border: OutlineInputBorder(
borderRadius: BorderRadius.circular(25))),
keyboardType: TextInputType.number,
),
),
ElevatedButton(
child: Icon(Icons.delete),
onPressed: () async {
DatabaseHelper.instance.delete(int.parse(numberController.text));
print(int.parse(numberController.text));
},
),
],
),
),
);
}
}