将下拉选择的值传递给 Dart 中的 firebase 集合

Question

Need to pass dropdown selected value from OrderListScreen to firebase collection order. Dont know the proper way of passing this field value to be reflect in firebase. Code for dropdown is ok need to get that selected value to be able to pass it to orderStatus field. Please help.

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter/src/foundation/key.dart';
import 'package:flutter/src/widgets/framework.dart';

class OrderListScreen extends StatefulWidget {
  const OrderListScreen({Key? key}) : super(key: key);

  @override
  State<OrderListScreen> createState() => _OrderListScreenState();
}

class _OrderListScreenState extends State<OrderListScreen> {
  String? newvalue;

  @override
  Widget build(BuildContext context) {
    String dropdownvalue = 'Pending';
    return Material(
      child: Container(
        child: Column(
          children: <Widget>[
            Text(" Please select the order status from the dropdown Below:",
                style: TextStyle(backgroundColor: Colors.orange)),
            Container(
                child: Material(
              child: DropdownButton<String>(
                value: newvalue,
                items: <String>[
                  'Pending',
                  'Confirmed',
                  'Dispatched',
                  'Received'
                ].map((String value) {
                  return DropdownMenuItem<String>(
                    value: value,
                    child: Text(value),
                  );
                }).toList(),
                onChanged: (String? newvalue) {
                  setState(() {
                    this.newvalue = newvalue;
                  });
                },
              ),
            )),
          ],
        ),
      ),
    );
  }
}

Answer 1

This question has already been answered in this thread

on select something from dropdown the value will be stored in dropdownValue

then to store to firebase

    FirebaseFirestore.instance
                .collection("collection")
                .doc(result.user.uid)
                .set({
              'Name': _Name.text,
               'myDropdownValue":dropdownValue
    
            });