Store file to Firebase Storage in Flutter for Flutter Web App

Question

I have been trying to store files to Firebase Storage but couldn't really get it. So, please help me solve this problem I have to store a single image file to Firebase Storage and then get the URL or the file and store it in Realtime Database, all for Flutter Web-App.

Thanks

These are the codes for selecting file

Future selectFile() async {
    final _picker = ImagePicker();
    var image;
    image = await _picker.pickImage(source: ImageSource.gallery);
    return image;
  }

These are the codes for storing File

Future addPhotoTStorage(File file) async {
    final storage = FirebaseStorage.instance;
    var snapshot = await storage.ref().child(file.path).putFile(file);
    String url = await snapshot.ref.getDownloadURL();
    return url;
  }