Exception caught by widgets library. Incorrect use of ParentDataWidget in Flutter

Question

I am getting this error. I read that with this error the problem is Expanded and solution to use it with a column , row or flex . But in my code, I use it that way, so there should be no error. Please help me.

My code:

  List<DataColumn> initHeader() {
    List<DataColumn> header = [];
    for (var i = 0; i < widget.headerList.length; i++) {
      header.add(new DataColumn(
          label: Flexible(
        child: Text(
          widget.headerList[i].name,
        ),
      )));
    }
    return header;
  }

Error:

Answer 1

lets use this code its will solve your peoblem

 Widget build(BuildContext context) {
        return Scaffold(
         body: Form(
            key: _formKey,
            child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: <Widget>[
            TextFormField(
           //ontroller: skuController,
            textInputAction: TextInputAction.done,
            decoration: InputDecoration(
          //labelText: AppLocalizations.instance.text('Scan'),
        suffixIcon: IconButton(
        onPressed: () {},
        icon: Icon(Icons.search),
        ),
        ),
      ),
     //ableReport(this.getProduct()),
      Row(
      children: <Widget>[
      Expanded(
      child: Padding(
      padding: const EdgeInsets.only(top: 25),
      child: ElevatedButton(
      onPressed: () {},
      child: Text('Submit'),
      ),
      )),
      Expanded(
      child: Padding(
      padding: const EdgeInsets.only(top: 25),
      child: ElevatedButton(
      onPressed: () {},
      child: Text(
      'Check items',
      textAlign: TextAlign.center,
      ),
      ),
      )),
      ],
      ),
      ],
      ),
      ));
    }
    }

Answer 2

I changed Flexible to Container and it works good without error.

Before:

  List<DataColumn> initHeader() {
    List<DataColumn> header = [];
    for (var i = 0; i < widget.headerList.length; i++) {
      header.add(new DataColumn(
          label: Flexible(
        child: Text(
          widget.headerList[i].name,
        ),
      )));
    }
    return header;
  }

After:

  List<DataColumn> initHeader() {
    List<DataColumn> header = [];
    for (var i = 0; i < widget.headerList.length; i++) {
      header.add(new DataColumn(
          label: Container(
        child: Text(
          widget.headerList[i].name,
        ),
      )));
    }
    return header;
  }