[Xamarin Forms] Help on the dynamism of button and picker controls

Good evening, everyone,

First of all know that I am a beginner with xamarin and development on mobile platforms, I use the visual studio development environment with the C# language.

This is my problem:

I have created several buttons, I would like that depending on the buttons I click there are different elements in a picker.

For example: if I click on the North Pole button there are in the picker all the communes that concern the North Pole and if I click on the South Pole there are all the communes that concern this pole.

Do I make myself understood? If so, is that possible?

here is my code on the xaml side:

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage
    x:Class="PolQual.Views.StatementReferencielPage"
    xmlns="http://xamarin.com/schemas/2014/forms"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
    xmlns:local="clr-namespace:PolQual.Views"
    xmlns:viewModels="clr-namespace:PolQual.ViewModels;assembly=PolQual"
    Title="Accueil">

    <ContentPage.BindingContext>
        <viewModels:StatementReferencielPageModel />
    </ContentPage.BindingContext>

    <ContentPage.Content>

        <StackLayout>

            <Grid>
                <Grid.RowDefinitions>
                    <RowDefinition Height="8*" />
                    <RowDefinition Height="2*" />
                    <RowDefinition Height="40" />
                </Grid.RowDefinitions>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="100*" />
                </Grid.ColumnDefinitions>

                <Label
                    Grid.Row="0"
                    Grid.Column="0"
                    FontSize="25"
                    HorizontalOptions="Center"
                    Text="Information sur le relevé référenciel" />

                <Label
                    x:Name="ErrorLabel"
                    Grid.Row="2"
                    Grid.Column="0"
                    FontSize="20"
                    HeightRequest="55"
                    HorizontalTextAlignment="Center"
                    TextColor="white"
                    VerticalTextAlignment="Center" />

            </Grid>

            <ScrollView>
                <Grid x:Name="gridLayout" />
            </ScrollView>

            <Grid>
                <Grid.RowDefinitions>
                    <RowDefinition Height="2*" />
                    <RowDefinition Height="3*" />
                    <RowDefinition Height="8*" />
                    <RowDefinition Height="2*" />
                    <RowDefinition Height="3*" />
                    <RowDefinition Height="6*" />
                    <RowDefinition Height="3*" />
                    <RowDefinition Height="6*" />
                    <RowDefinition Height="3*" />
                    <RowDefinition Height="6*" />
                    <RowDefinition Height="2*" />
                    <RowDefinition Height="6*" />
                    <RowDefinition Height="1*" />
                </Grid.RowDefinitions>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="25*" />
                    <ColumnDefinition Width="50*" />
                    <ColumnDefinition Width="25*" />
                </Grid.ColumnDefinitions>

                <Label
                    Grid.Row="1"
                    Grid.Column="1"
                    FontSize="15"
                    Text="Veuillez sélectioner le secteur :" />

                <Picker
                    x:Name="PickerSectorsLists"
                    Title="Sélectionner votre secteur"
                    Grid.Row="2"
                    Grid.Column="1"
                    ItemDisplayBinding="{Binding Value}"
                    ItemsSource="{Binding SectorsLists}"
                    SelectedItem="{Binding SelectedSector}" />

                <Label
                    Grid.Row="4"
                    Grid.Column="1"
                    FontSize="15"
                    Text="{Binding ShowHouseholdTrash}" />

                <Switch
                    x:Name="SwitchHousehodTrash"
                    Grid.Row="5"
                    Grid.Column="1"
                    HorizontalOptions="Start"
                    IsToggled="{Binding HouseholdTrash}" />

                <Label
                    Grid.Row="6"
                    Grid.Column="1"
                    FontSize="15"
                    Text="{Binding ShowBoxboard}" />

                <Switch
                    x:Name="SwitchBoxboard"
                    Grid.Row="7"
                    Grid.Column="1"
                    HorizontalOptions="Start"
                    IsToggled="{Binding Boxboard}" />

                <Label
                    Grid.Row="8"
                    Grid.Column="1"
                    FontSize="15"
                    Text="{Binding ShowGlass}" />

                <Switch
                    x:Name="SwitchGlass"
                    Grid.Row="9"
                    Grid.Column="1"
                    HorizontalOptions="Start"
                    IsToggled="{Binding Glass}" />

                <Button
                    Grid.Row="11"
                    Grid.Column="1"
                    BackgroundColor="#2196f3"
                    Clicked="GoToAssesmentGrid"
                    FontSize="20"
                    Text="Valider les informations"
                    TextColor="White" />

            </Grid>

        </StackLayout>

    </ContentPage.Content>
</ContentPage>

Behind C# side

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

using Xamarin.Forms;
using Xamarin.Forms.Xaml;
using PolQual.ViewModels;

namespace PolQual.Views
{
    [XamlCompilation(XamlCompilationOptions.Compile)]
    public partial class StatementReferencielPage : ContentPage
    {
        private List<Pole> PolesLists { get; set; }

        public StatementReferencielPage()
        {
            InitializeComponent ();
            //BindingContext = new StatementReferencielPageModel();

            PolesLists = new List<Pole>
            {
                new Pole { Key = 1, Name = "Erdre et Cens", Color = "ffccd5"},
                new Pole { Key = 1, Name = "Erdre et Loire", Color = "ff4d4d"},
                new Pole { Key = 1, Name = "Loire-Sèvre et vignoble", Color = "ff9933"},
                new Pole { Key = 1, Name = "Sud-Ouest", Color = "bfbfbf"},
                new Pole { Key = 1, Name = "Loire-chézine", Color = "ffff4d"},
                new Pole { Key = 1, Name = "Nantes-Ouest", Color = "3385ff"},
                new Pole { Key = 1, Name = "Nantes-Loire", Color = "53c653"},
            };

            gridLayout.RowDefinitions.Add(new RowDefinition { Height = new GridLength(40) });
            gridLayout.RowDefinitions.Add(new RowDefinition { Height = new GridLength(40) });
            gridLayout.RowDefinitions.Add(new RowDefinition { Height = new GridLength(40) });
            gridLayout.RowDefinitions.Add(new RowDefinition { Height = new GridLength(40) });
            gridLayout.RowDefinitions.Add(new RowDefinition { Height = new GridLength(40) });
            gridLayout.RowDefinitions.Add(new RowDefinition { Height = new GridLength(40) });
            gridLayout.RowDefinitions.Add(new RowDefinition { Height = new GridLength(40) });
            //collmun
            gridLayout.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(25, GridUnitType.Star) });
            gridLayout.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(50, GridUnitType.Star) });
            gridLayout.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(25, GridUnitType.Star) });

            var PolesListsIndex = 0;

            for (int columnIndex = 1; columnIndex < 2; columnIndex++)
            {
                for (int rowIndex = 0; rowIndex < 7; rowIndex++)
                {
                    if (PolesListsIndex >= PolesLists.Count)
                    {
                        return;
                    }
                    var poles = PolesLists[PolesListsIndex];
                    PolesListsIndex += 1;

                    var button = new Button
                    {
                        Text = poles.Name,
                        BackgroundColor = Color.FromHex(poles.Color),
                        HorizontalOptions = LayoutOptions.Center,
                        VerticalOptions = LayoutOptions.Center,
                        WidthRequest = 280,
                    };
                    button.Clicked += async (object sender, EventArgs e) => await Navigation.PushAsync(new AssesmentGridPage());
                    gridLayout.Children.Add(button, columnIndex, rowIndex);
                }
            }
        }

        public void GoToAssesmentGrid(object sender, System.EventArgs e)
        {
            if (PickerSectorsLists.SelectedIndex == -1) 
            {
                ErrorLabel.BackgroundColor = Color.FromHex("ef5350");
                ErrorLabel.Text = "Veuillez sélectioner un secteur !";
                return;
            }
            else
            {
                var page = new AssesmentGridPage();
                Navigation.PushAsync(page);
                ErrorLabel.Text = null;
                ErrorLabel.BackgroundColor = Color.FromHex("#FFFFFF");
            }
         }

        public class Pole
        {
            public int Key { get; set; }
            public string Color { get; set; }
            public string Name { get; set; }
        }
    }
}