class Mytextlist extends StatelessWidget {
     final Function adddata;
       Mytextlist(this.adddata);
      TextEditingController titleController = TextEditingController();
    TextEditingController valueController = TextEditingController();
    @override
   Widget build(BuildContext context) {
     return Container(
    decoration: BoxDecoration(
        border: Border.all(
      color: Colors.black,
    )),
    child: Column(
      children: [
        Card(
            child: Column(children: <Widget>[
          TextField(
            decoration: const InputDecoration(
              labelText: "title",
            ),
            controller: titleController,
          ),
        ])),
        Card(
            child: Column(children: <Widget>[
          TextField(
            decoration: const InputDecoration(labelText: "expenses"),
            controller: valueController,
          ),
        ])),
        ElevatedButton(
            onPressed: adddata(
                titleController.text,
                double.parse(
                  (valueController.text),
                )),
            child: const Text("ADD Transaction")),
      ],
    ));

} }

//here i want to pass the value that was entered in the Textfield , my function adddata which will invoked while pressing button,which accepts string and double value, titlecontroller.text coverts value to string but double.parse is not converting the data into double , and the application is throwing error at format exception

CodePudding user response：

I don't know what value you trying to parse but I assume that you are using comma instead of point

14,54 - invalid format

but

14.54 - valid format

Just replace comma with point before parsing

CodePudding user response：

Please provide details of your value which you are passing. If you are passing it with comma you have to remove those commas before passing it to double.

ElevatedButton(
    onPressed: (){
      // Assume your valueController.text = 11,000
      var inputValue = valueController.text.replace(",", ""); 
      adddata(titleController.text, double.parse(inputValue)),
    }
    child: const Text("ADD Transaction")
),