我有編輯表單，其中文本欄位控制器中的一些資料來自資料庫，但是當我編輯或更改任何文本欄位的測驗時，它不會更改文本欄位的值，給它來自資料庫的相同值，我無法更改文本檔案值。
這是我的代碼：-
class Edit extends StatefulWidget {
Edit({Key? key}) : super(key: key);
@override
_Edit createState() => _Edit();
}
class _Edit extends State<Edit>{
var UsrID = Auth.prefs?.getString('usrid');
var data;
RangeValues? _currentRangeValues;
@override
void initState() {
super.initState();
getData();
}
getData() async{
var res = await http.get(Uri.https('www.*******.com',
'/index.php',{'act':'profile','UsrID': '${UsrID}'}));
data = jsonDecode(res.body);
print(data);
setState(() {});
print(res.body);
}
TextEditingController _name = TextEditingController();
TextEditingController _email = TextEditingController();
TextEditingController _phone = TextEditingController();
var name = "";
var email = "";
var phone = "";
var user = "";
@override
Widget build(BuildContext context){
return Scaffold(
Container(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Padding(
padding: EdgeInsets.fromLTRB(10, 0, 0, 0),
child: Text("Name",
style: TextStyle(color: Colors.black,),
),
),
addVerticalSpace(10),
TextField(
controller: _name..text = '${data[0]['name']}',
keyboardType: TextInputType.text,
obscureText: false,
decoration: InputDecoration(
hintText: 'Zeo Saldana',
),
)
],
),
),
addVerticalSpace(20),
Container(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Padding(
padding: EdgeInsets.fromLTRB(10, 0, 0, 0),
child: Text("Email",
style: TextStyle(color: Colors.black,),
),
),
addVerticalSpace(10),
TextField(
controller: _email..text = '${data[0]['email']}',
keyboardType: TextInputType.text,
obscureText: false,
decoration: InputDecoration(
hintText: '[email protected]',
),
)],
),),
addVerticalSpace(20),
Container(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Padding(padding: EdgeInsets.fromLTRB(10, 0, 0, 0),
child: Text("Phone Number",
style: TextStyle(color: Colors.black,),
),
),
addVerticalSpace(10),
TextField(
controller: _phone..text = '${data[0]['mobile']}',
keyboardType: TextInputType.text,
obscureText: false,
decoration: InputDecoration(
hintText: ' 1 94526 12547',
),
)
],),
)
addVerticalSpace(30),
ElevatedButton(
child: const Text(
'SAVE',
style: TextStyle(
fontSize: 18,
),
),
onPressed: () async{
name = _name.text;
email = _email.text;
phone = _phone.text;
user = '${UsrID}';
final body = null;
final url = Uri.https('www.*******.net', '/index.php',{'act':'profileupdate','name': name, 'email': email, 'phone': phone, 'user': user});
final response = await http.post(
url,
headers: {'Content-Type': 'application/json'},
body: body
);
print(url);
int statusCode = response.statusCode;
//var responseBody = json.decode(response.body);
Map<String, dynamic> responseBody = jsonDecode(response.body);
setState(() {});
var list = responseBody['error'];
var stringList = list.join("\n");
print(stringList); //Prints "in new line"
var statusRes = responseBody['status'];
var UserID = responseBody['usrid'];
if(statusRes == 'success'){
print('success: ' statusRes);
print(UserID);
} else {
print('error: ' statusRes);
}
print(responseBody);
//print(allerror);
setState(() {});
},
)
}
當我更改它不保存的任何欄位的值以及列印發布 API 時，它會顯示舊資料，任何資料都無法更改和保存。
請幫助我如何編輯所有現場控制器資料并將其發布到 API 以保存在資料庫中。
uj5u.com熱心網友回復：
問題來自這里
controller: _name..text = '${data[0]['name']}',
它強制控制器具有相同的值。您可以使用TextEditingController.fromValue第一次分配。
late TextEditingController _name = TextEditingController.fromValue(TextEditingValue(text: data[0]['name']));
對其他欄位重復相同的操作。更多關于TextEditingController
uj5u.com熱心網友回復：
嘿，問題就在這里controller: _name..text = '${data[0]['name']}'，因為每次 setState 呼叫它都會再次重建小部件并將舊值分配給控制器。
您可以像 Yeasin 向您描述的那樣為控制器設定值，或者您可以在 getData 方法中提供控制器值，如下所示 -
getData() async{
var res = await http.get(Uri.https('www.*******.com',
'/index.php',{'act':'profile','UsrID': '${UsrID}'}));
data = jsonDecode(res.body);
// assign value to controller here
_name.text = data[0;
setState(() {});
print(res.body);
}
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