CSCPickerState._onSelectedCountry about csc_picker

[salvaterra]

Try this

///triggers once country selected in dropdown
                    onCountryChanged: (value) {
                      setState(() {
                        ///store value in country variable
                        countryValue = value;
                      });
                    },

                    ///triggers once state selected in dropdown
                    onStateChanged: (value) {
                      setState(() {
                        ///store value in state variable
                        stateValue = value ?? "";
                      });
                    },

                    ///triggers once city selected in dropdown
                    onCityChanged: (value) {
                      setState(() {
                        ///store value in city variable
                        cityValue = value ?? "";
                      });

still makeing problem
if you can edit my code will be fine

[Heydran]

I had a similar error that occurred because when you change the value of country and state, the callbacks of its children state and city or just city in the case of the state, are called passing the NULL value as a parameter, this occurs because the state is /or city is reset to not have invalid combinations.

To prevent the error you just need to create the 3 onchange callbacks, for country, city and state keeping in mind that they will be called passing the NULL parameter.

sorry, translator inglish. I am Brazilian.