c#
        private async void OnLoginSuccess()
        {
            Debug.WriteLine("Before navigation");
            await Shell.Current.GoToAsync($"///MainPage");
            Debug.WriteLine("After navigation");
        }

c#
        private async void OnLoginSuccess()
        {
            Debug.WriteLine("Before navigation");
            await Shell.Current.GoToAsync($"///MainPage");
            Debug.WriteLine("After navigation");
        }

c#
<?xml version="1.0" encoding="UTF-8" ?>
<Shell
    x:Class="MauiInvoiceApplication.AppShell"
    xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
    xmlns:local="clr-namespace:MauiInvoiceApplication"
    xmlns:pages="clr-namespace:MauiInvoiceApplication.Pages"
    Shell.FlyoutBehavior="Disabled">

    <ShellContent Title="Home" ContentTemplate="{DataTemplate local:MainPage}" Route="MainPage" />

</Shell>

c#
<?xml version="1.0" encoding="UTF-8" ?>
<Shell
    x:Class="MauiInvoiceApplication.AppShell"
    xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
    xmlns:local="clr-namespace:MauiInvoiceApplication"
    xmlns:pages="clr-namespace:MauiInvoiceApplication.Pages"
    Shell.FlyoutBehavior="Disabled">

    <ShellContent Title="Home" ContentTemplate="{DataTemplate local:MainPage}" Route="MainPage" />

</Shell>

c#
using MauiInvoiceApplication.Pages;

namespace MauiInvoiceApplication
{
    public partial class App : Application
    {
        public App()
        {
            InitializeComponent();

            MainPage = new NavigationPage(new LoginPage());
        }
    }
}

c#
using MauiInvoiceApplication.Pages;

namespace MauiInvoiceApplication
{
    public partial class App : Application
    {
        public App()
        {
            InitializeComponent();

            MainPage = new NavigationPage(new LoginPage());
        }
    }
}

c#
using MySql.Data.MySqlClient;
using System;
using System.Data;
using System.Diagnostics;

namespace MauiInvoiceApplication.Classes
{
    class DBConnect : IDisposable
    {
        MySqlConnection conn;
        string myConnectionString;
        static string host = "phpmyadmin.adonkers.com";
        static string database = "InvoiceApp";
        static string userDB = "";
        static string password = "";
        static string ssltype = "None";
        static string dbport = "3306";
        static string dbpubkeyre = "true";
        static string Multipleact = "true";
        static string strProvider = "server=" + host + ";Database=" + database + ";User ID=" + userDB + ";Password=" + password + ";SslMode=" + ssltype + ";Port=" + dbport + "AllowPublicKeyRetrieval=" + dbpubkeyre + "MultipleActiveResultSets=" + Multipleact;

        public bool Open()
        {
            strProvider = "server=" + host + ";Database=" + database + ";User ID=" + userDB + ";Password=" + password +
                          ";SslMode=" + ssltype + ";Port=" + dbport + ";AllowPublicKeyRetrieval=" + dbpubkeyre;
            conn = new MySqlConnection(strProvider);
            conn.Open();
            return true;
        }

        public void Close()
        {
            conn.Close();
            conn.Dispose();
        }

        public DataSet ExecuteDataSet(string sql)
        {
            try
            {
                DataSet ds = new DataSet();
                MySqlDataAdapter da = new MySqlDataAdapter(sql, conn);
                da.Fill(ds, "result");
                return ds;
            }
            catch (Exception ex)
            {
                Debug.WriteLine("Error DBConnect" + ex.Message);
            }
            return null;
        }

        public MySqlDataReader ExecuteReader(string sql)
        {
            try
            {
                MySqlDataReader reader;
                MySqlCommand cmd = new MySqlCommand(sql, conn);
                reader = cmd.ExecuteReader();
                return reader;
            }
            catch (Exception ex)
            {
                Debug.WriteLine("Error DBConnect" + ex.Message);
            }
            return null;
        }

        public int ExecuteNonQuery(string sql)
        {
            try
            {
                int affected;
                MySqlTransaction mytransaction = conn.BeginTransaction();
                MySqlCommand cmd = conn.CreateCommand();
                cmd.CommandText = sql;
                affected = cmd.ExecuteNonQuery();
                mytransaction.Commit();
                return affected;
            }
            catch (Exception ex)
            {
                Debug.WriteLine("Error DBConnect" + ex.Message);
            }
            return -1;
        }

        public void Dispose()
        {
            Dispose(true);
            GC.SuppressFinalize(this);
        }

        protected virtual void Dispose(bool disposing)
        {
            if (disposing)
            {
                if (conn != null)
                {
                    conn.Dispose();
                    conn = null;
                }
            }
        }
    }
}

c#
using MySql.Data.MySqlClient;
using System;
using System.Data;
using System.Diagnostics;

namespace MauiInvoiceApplication.Classes
{
    class DBConnect : IDisposable
    {
        MySqlConnection conn;
        string myConnectionString;
        static string host = "phpmyadmin.adonkers.com";
        static string database = "InvoiceApp";
        static string userDB = "";
        static string password = "";
        static string ssltype = "None";
        static string dbport = "3306";
        static string dbpubkeyre = "true";
        static string Multipleact = "true";
        static string strProvider = "server=" + host + ";Database=" + database + ";User ID=" + userDB + ";Password=" + password + ";SslMode=" + ssltype + ";Port=" + dbport + "AllowPublicKeyRetrieval=" + dbpubkeyre + "MultipleActiveResultSets=" + Multipleact;

        public bool Open()
        {
            strProvider = "server=" + host + ";Database=" + database + ";User ID=" + userDB + ";Password=" + password +
                          ";SslMode=" + ssltype + ";Port=" + dbport + ";AllowPublicKeyRetrieval=" + dbpubkeyre;
            conn = new MySqlConnection(strProvider);
            conn.Open();
            return true;
        }

        public void Close()
        {
            conn.Close();
            conn.Dispose();
        }

        public DataSet ExecuteDataSet(string sql)
        {
            try
            {
                DataSet ds = new DataSet();
                MySqlDataAdapter da = new MySqlDataAdapter(sql, conn);
                da.Fill(ds, "result");
                return ds;
            }
            catch (Exception ex)
            {
                Debug.WriteLine("Error DBConnect" + ex.Message);
            }
            return null;
        }

        public MySqlDataReader ExecuteReader(string sql)
        {
            try
            {
                MySqlDataReader reader;
                MySqlCommand cmd = new MySqlCommand(sql, conn);
                reader = cmd.ExecuteReader();
                return reader;
            }
            catch (Exception ex)
            {
                Debug.WriteLine("Error DBConnect" + ex.Message);
            }
            return null;
        }

        public int ExecuteNonQuery(string sql)
        {
            try
            {
                int affected;
                MySqlTransaction mytransaction = conn.BeginTransaction();
                MySqlCommand cmd = conn.CreateCommand();
                cmd.CommandText = sql;
                affected = cmd.ExecuteNonQuery();
                mytransaction.Commit();
                return affected;
            }
            catch (Exception ex)
            {
                Debug.WriteLine("Error DBConnect" + ex.Message);
            }
            return -1;
        }

        public void Dispose()
        {
            Dispose(true);
            GC.SuppressFinalize(this);
        }

        protected virtual void Dispose(bool disposing)
        {
            if (disposing)
            {
                if (conn != null)
                {
                    conn.Dispose();
                    conn = null;
                }
            }
        }
    }
}