Help How to connect sql server database in xamarin

[Sakurara]

I tried this and a couple of other things but the main problem I am phasing is that I am getting a connection error in sql server browser
using MySqlConnector;
using System;
using System.Data.SqlClient;
using Xamarin.Forms;

namespace JersonVillaceran
{

public partial class Login : ContentPage
{


public Login()
{
InitializeComponent();
testConnection();


}
private void testConnection()
{
string connectionString = "Server=DESKTOP-7RTEHS2\\SQLEXPRESS;Database=MCC;Uid=;Pwd=;";
SqlConnection connection = new SqlConnection(connectionString);
try
{
connection.Open();
Console.WriteLine("Successfully connected to databse");
}
catch (Exception ex)
{
Console.WriteLine("Successfully connected to databse");
}
finally
{
if (connection.State == System.Data.ConnectionState.Open)
{
connection.Close();
}
}
}
private void insertUser()
{
string connectionString = "Server=DESKTOP-7RTEHS2\\SQLEXPRESS;Database=MCC;Integrated Security=True;";
using (SqlConnection connection = new SqlConnection(connectionString))
{
try
{
connection.Open();

string query = "INSERT INTO users (username, password) VALUES (username, Password)";
SqlCommand cmd = new SqlCommand(query, connection);
string userName = txtUsername.Text;
string userPass = txtPassword.Text;

cmd.Parameters.AddWithValue("username", userName);
cmd.Parameters.AddWithValue("Password", userPass);

int rowsAffected = cmd.ExecuteNonQuery();
if (rowsAffected > 0)
{
Console.WriteLine("User inserted successfully.");
}
else
{
Console.WriteLine("Failed to insert user.");
}
}
catch (Exception ex)
{
Console.WriteLine("Error: " + ex.Message);
}
}
}

private void OnLoginButtonClicked(object sender, EventArgs e)
{
string username = txtUsername.Text;
string password = txtPassword.Text;

// Validate username and password
if (string.IsNullOrEmpty(username) || string.IsNullOrEmpty(password))
{
// Display error message
DisplayAlert("Error", "Please enter both username and password.", "OK");
return;
}

string constring = "Server=DESKTOP-7RTEHS2\\SQLEXPRESS;Database=MCC;Uid=;Pwd=;";
SqlConnection connection = new SqlConnection(constring);
{
try
{
connection.Open();

// Construct the query
string queryString = "SELECT Id, username, password FROM users WHERE username = Username and password = Password";

// Create a SqlCommand object with the query and connection
using (SqlCommand command = new SqlCommand(queryString, connection))
{
// Add parameters to the command
command.Parameters.AddWithValue("username", username);
command.Parameters.AddWithValue("Password", password);

// Execute the query
SqlDataReader reader = command.ExecuteReader();

// Check if any rows were returned
if (reader.HasRows)
{
// Successful login
Console.WriteLine("Login successful. Redirecting to dashboard...");
// Redirect to the dashboard page
App.Current.MainPage.Navigation.PushAsync(new Dashboard());
}
else
{
// Invalid username or password
DisplayAlert("Error", "Invalid username or password.", "OK");
}

// Close the reader
reader.Close();
}
}
catch (Exception ex)
{
// Handle any exceptions
Console.WriteLine("Error: " + ex.Message);
DisplayAlert("Error", "An error occurred while logging in.", "OK");
}
}
}
}
}

 

[🤖]

It looks like you are encountering a connection error when trying to connect to your SQL Server database in Xamarin. The issue could be due to several reasons, such as incorrect connection strings, missing credentials, or SQL Server configuration settings.

Here are a few suggestions to help you troubleshoot and resolve the connection error:

1. Check SQL Server Configuration:
- Ensure that your SQL Server instance is running.
- Make sure that TCP/IP and Named ***** are enabled in SQL Server Configuration Manager.
- Verify that the SQL Server Browser service is running.

2. Correct Connection String:
- Double-check your connection strings in the testConnection(), insertUser(), and OnLoginButtonClicked() methods. Ensure that they contain the correct server name, database name, and credentials.
- In your connection strings, make sure to provide a valid username and password or use integrated security if appropriate.

3. Handling Database Query:
- In your OnLoginButtonClicked() method, ensure that the SQL query is constructed correctly. You need to use placeholders for parameters in the query and then add those parameters with values.
- Check the SQL query for selecting users. It should compare the provided username and password with the actual values in the database.

4. Error Handling:
- Improve your error handling by providing more detailed error messages or logging to help identify the root cause of the issue. For example, you are currently displaying "Successfully connected to database" in the catch block, which should be corrected to indicate a connection error instead.

5. Debugging:
- Use breakpoints and debugging tools in Visual Studio to step through your code and inspect variable values during runtime. This can help you identify where the issue is occurring.

6. Testing:
- Test your database connection separately using tools like SQL Server Management Studio to ensure that the credentials and server name are correct.

By following these suggestions and making the necessary adjustments to your code, you should be able to troubleshoot the connection error and successfully connect to your SQL Server database in Xamarin. If you encounter any specific error messages or issues during the debugging process, feel free to provide more details for further assistance.

 

[Sakurara]

It looks like you are encountering a connection error when trying to connect to your SQL Server database in Xamarin. The issue could be due to several reasons, such as incorrect connection strings, missing credentials, or SQL Server configuration settings.

Here are a few suggestions to help you troubleshoot and resolve the connection error:

1. Check SQL Server Configuration:
- Ensure that your SQL Server instance is running.
- Make sure that TCP/IP and Named ***** are enabled in SQL Server Configuration Manager.
- Verify that the SQL Server Browser service is running.

2. Correct Connection String:
- Double-check your connection strings in the testConnection(), insertUser(), and OnLoginButtonClicked() methods. Ensure that they contain the correct server name, database name, and credentials.
- In your connection strings, make sure to provide a valid username and password or use integrated security if appropriate.

3. Handling Database Query:
- In your OnLoginButtonClicked() method, ensure that the SQL query is constructed correctly. You need to use placeholders for parameters in the query and then add those parameters with values.
- Check the SQL query for selecting users. It should compare the provided username and password with the actual values in the database.

4. Error Handling:
- Improve your error handling by providing more detailed error messages or logging to help identify the root cause of the issue. For example, you are currently displaying "Successfully connected to database" in the catch block, which should be corrected to indicate a connection error instead.

5. Debugging:
- Use breakpoints and debugging tools in Visual Studio to step through your code and inspect variable values during runtime. This can help you identify where the issue is occurring.

6. Testing:
- Test your database connection separately using tools like SQL Server Management Studio to ensure that the credentials and server name are correct.

By following these suggestions and making the necessary adjustments to your code, you should be able to troubleshoot the connection error and successfully connect to your SQL Server database in Xamarin. If you encounter any specific error messages or issues during the debugging process, feel free to provide more details for further assistance.

please correct my code base in my post in connection string and handling database query

 

[🤖]

please correct my code base in my post in connection string and handling database query

I noticed a few issues in your code related to the connection strings and handling of database queries. Here are some corrections and improvements you can make:

1. Connection String Corrections:
- In your connection strings, ensure that you provide the correct server name, database name, and credentials. Here are the corrected connection strings for your testConnection(), insertUser(), and OnLoginButtonClicked() methods:

// For testConnection() method
string connectionStringTest = "Data Source=DESKTOP-7RTEHS2\\SQLEXPRESS;Initial Catalog=MCC;Integrated Security=True;";

// For insertUser() method
string connectionStringInsert = "Data Source=DESKTOP-7RTEHS2\\SQLEXPRESS;Initial Catalog=MCC;Integrated Security=True;";

// For OnLoginButtonClicked() method
string connectionStringLogin = "Data Source=DESKTOP-7RTEHS2\\SQLEXPRESS;Initial Catalog=MCC;Integrated Security=True;";

2. Handling Database Queries:
- Update the SQL query in the insertUser() method to correctly insert the username and password values into the database. Also, ensure that you enclose the parameters with single quotes if they are string values.

// Update the query in insertUser() method
string query = "INSERT INTO users (username, password) VALUES (@username, @password)";
SqlCommand cmd = new SqlCommand(query, connection);
string userName = txtUsername.Text;
string userPass = txtPassword.Text;

cmd.Parameters.AddWithValue("@username", userName);
cmd.Parameters.AddWithValue("@password", userPass);

- Fix the SQL query in the OnLoginButtonClicked() method to properly compare the provided username and password with the database values.

// Update the query in OnLoginButtonClicked() method
string queryString = "SELECT Id, username, password FROM users WHERE username = @username and password = @password";

These corrections should help in resolving the connection issues and improving the handling of database queries in your Xamarin app. Make sure to test the changes and debug any further issues that may arise during the execution. If you encounter any specific errors or need further assistance, feel free to ask!

 

[Sakurara]

I noticed a few issues in your code related to the connection strings and handling of database queries. Here are some corrections and improvements you can make:

1. Connection String Corrections:
- In your connection strings, ensure that you provide the correct server name, database name, and credentials. Here are the corrected connection strings for your testConnection(), insertUser(), and OnLoginButtonClicked() methods:

// For testConnection() method
string connectionStringTest = "Data Source=DESKTOP-7RTEHS2\\SQLEXPRESS;Initial Catalog=MCC;Integrated Security=True;";

// For insertUser() method
string connectionStringInsert = "Data Source=DESKTOP-7RTEHS2\\SQLEXPRESS;Initial Catalog=MCC;Integrated Security=True;";

// For OnLoginButtonClicked() method
string connectionStringLogin = "Data Source=DESKTOP-7RTEHS2\\SQLEXPRESS;Initial Catalog=MCC;Integrated Security=True;";

2. Handling Database Queries:
- Update the SQL query in the insertUser() method to correctly insert the username and password values into the database. Also, ensure that you enclose the parameters with single quotes if they are string values.

// Update the query in insertUser() method
string query = "INSERT INTO users (username, password) VALUES (@username, @password)";
SqlCommand cmd = new SqlCommand(query, connection);
string userName = txtUsername.Text;
string userPass = txtPassword.Text;

cmd.Parameters.AddWithValue("@username", userName);
cmd.Parameters.AddWithValue("@password", userPass);

- Fix the SQL query in the OnLoginButtonClicked() method to properly compare the provided username and password with the database values.

// Update the query in OnLoginButtonClicked() method
string queryString = "SELECT Id, username, password FROM users WHERE username = @username and password = @password";

These corrections should help in resolving the connection issues and improving the handling of database queries in your Xamarin app. Make sure to test the changes and debug any further issues that may arise during the execution. If you encounter any specific errors or need further assistance, feel free to ask!

please *********** code in this
using MySqlConnector;
using System;
using System.Data.SqlClient;
using Xamarin.Forms;

namespace JersonVillaceran
{

public partial class Login : ContentPage
{


public Login()
{
InitializeComponent();
testConnection();


}
private void testConnection()
{
string connectionString = "Server=DESKTOP-7RTEHS2\\SQLEXPRESS;Database=MCC;Uid=;Pwd=;";
SqlConnection connection = new SqlConnection(connectionString);
try
{
connection.Open();
Console.WriteLine("Successfully connected to databse");
}
catch (Exception ex)
{
Console.WriteLine("Successfully connected to databse");
}
finally
{
if (connection.State == System.Data.ConnectionState.Open)
{
connection.Close();
}
}
}
private void insertUser()
{
string connectionString = "Server=DESKTOP-7RTEHS2\\SQLEXPRESS;Database=MCC;Integrated Security=True;";
using (SqlConnection connection = new SqlConnection(connectionString))
{
try
{
connection.Open();

string query = "INSERT INTO users (username, password) VALUES (username, Password)";
SqlCommand cmd = new SqlCommand(query, connection);
string userName = txtUsername.Text;
string userPass = txtPassword.Text;

cmd.Parameters.AddWithValue("username", userName);
cmd.Parameters.AddWithValue("Password", userPass);

int rowsAffected = cmd.ExecuteNonQuery();
if (rowsAffected > 0)
{
Console.WriteLine("User inserted successfully.");
}
else
{
Console.WriteLine("Failed to insert user.");
}
}
catch (Exception ex)
{
Console.WriteLine("Error: " + ex.Message);
}
}
}

private void OnLoginButtonClicked(object sender, EventArgs e)
{
string username = txtUsername.Text;
string password = txtPassword.Text;

// Validate username and password
if (string.IsNullOrEmpty(username) || string.IsNullOrEmpty(password))
{
// Display error message
DisplayAlert("Error", "Please enter both username and password.", "OK");
return;
}

string constring = "Server=DESKTOP-7RTEHS2\\SQLEXPRESS;Database=MCC;Uid=;Pwd=;";
SqlConnection connection = new SqlConnection(constring);
{
try
{
connection.Open();

// Construct the query
string queryString = "SELECT Id, username, password FROM users WHERE username = Username and password = Password";

// Create a SqlCommand object with the query and connection
using (SqlCommand command = new SqlCommand(queryString, connection))
{
// Add parameters to the command
command.Parameters.AddWithValue("username", username);
command.Parameters.AddWithValue("Password", password);

// Execute the query
SqlDataReader reader = command.ExecuteReader();

// Check if any rows were returned
if (reader.HasRows)
{
// Successful login
Console.WriteLine("Login successful. Redirecting to dashboard...");
// Redirect to the dashboard page
App.Current.MainPage.Navigation.PushAsync(new Dashboard());
}
else
{
// Invalid username or password
DisplayAlert("Error", "Invalid username or password.", "OK");
}

// Close the reader
reader.Close();
}
}
catch (Exception ex)
{
// Handle any exceptions
Console.WriteLine("Error: " + ex.Message);
DisplayAlert("Error", "An error occurred while logging in.", "OK");
}
}
}
}
}

 

[🤖]

please *********** code in this
using MySqlConnector;
using System;
using System.Data.SqlClient;
using Xamarin.Forms;

namespace JersonVillaceran
{

public partial class Login : ContentPage
{


public Login()
{
InitializeComponent();
testConnection();


}
private void testConnection()
{
string connectionString = "Server=DESKTOP-7RTEHS2\\SQLEXPRESS;Database=MCC;Uid=;Pwd=;";
SqlConnection connection = new SqlConnection(connectionString);
try
{
connection.Open();
Console.WriteLine("Successfully connected to databse");
}
catch (Exception ex)
{
Console.WriteLine("Successfully connected to databse");
}
finally
{
if (connection.State == System.Data.ConnectionState.Open)
{
connection.Close();
}
}
}
private void insertUser()
{
string connectionString = "Server=DESKTOP-7RTEHS2\\SQLEXPRESS;Database=MCC;Integrated Security=True;";
using (SqlConnection connection = new SqlConnection(connectionString))
{
try
{
connection.Open();

string query = "INSERT INTO users (username, password) VALUES (username, Password)";
SqlCommand cmd = new SqlCommand(query, connection);
string userName = txtUsername.Text;
string userPass = txtPassword.Text;

cmd.Parameters.AddWithValue("username", userName);
cmd.Parameters.AddWithValue("Password", userPass);

int rowsAffected = cmd.ExecuteNonQuery();
if (rowsAffected > 0)
{
Console.WriteLine("User inserted successfully.");
}
else
{
Console.WriteLine("Failed to insert user.");
}
}
catch (Exception ex)
{
Console.WriteLine("Error: " + ex.Message);
}
}
}

private void OnLoginButtonClicked(object sender, EventArgs e)
{
string username = txtUsername.Text;
string password = txtPassword.Text;

// Validate username and password
if (string.IsNullOrEmpty(username) || string.IsNullOrEmpty(password))
{
// Display error message
DisplayAlert("Error", "Please enter both username and password.", "OK");
return;
}

string constring = "Server=DESKTOP-7RTEHS2\\SQLEXPRESS;Database=MCC;Uid=;Pwd=;";
SqlConnection connection = new SqlConnection(constring);
{
try
{
connection.Open();

// Construct the query
string queryString = "SELECT Id, username, password FROM users WHERE username = Username and password = Password";

// Create a SqlCommand object with the query and connection
using (SqlCommand command = new SqlCommand(queryString, connection))
{
// Add parameters to the command
command.Parameters.AddWithValue("username", username);
command.Parameters.AddWithValue("Password", password);

// Execute the query
SqlDataReader reader = command.ExecuteReader();

// Check if any rows were returned
if (reader.HasRows)
{
// Successful login
Console.WriteLine("Login successful. Redirecting to dashboard...");
// Redirect to the dashboard page
App.Current.MainPage.Navigation.PushAsync(new Dashboard());
}
else
{
// Invalid username or password
DisplayAlert("Error", "Invalid username or password.", "OK");
}

// Close the reader
reader.Close();
}
}
catch (Exception ex)
{
// Handle any exceptions
Console.WriteLine("Error: " + ex.Message);
DisplayAlert("Error", "An error occurred while logging in.", "OK");
}
}
}
}
}

Here is your code with the corrections and improvements made in the connection strings and handling of database queries:

using System;
using System.Data.SqlClient;
using Xamarin.Forms;

namespace JersonVillaceran
{
    public partial class Login : ContentPage
    {
        public Login()
        {
            InitializeComponent();
            TestConnection();
        }

        private void TestConnection()
        {
            string connectionStringTest = "Data Source=DESKTOP-7RTEHS2\\SQLEXPRESS;Initial Catalog=MCC;Integrated Security=True;";
            SqlConnection connection = new SqlConnection(connectionStringTest);

            try
            {
                connection.Open();
                Console.WriteLine("Successfully connected to database");
            }
            catch (Exception ex)
            {
                Console.WriteLine("Error connecting to database: " + ex.Message);
            }
            finally
            {
                if (connection.State == System.Data.ConnectionState.Open)
                {
                    connection.Close();
                }
            }
        }

        private void InsertUser()
        {
            string connectionStringInsert = "Data Source=DESKTOP-7RTEHS2\\SQLEXPRESS;Initial Catalog=MCC;Integrated Security=True;";
            using (SqlConnection connection = new SqlConnection(connectionStringInsert))
            {
                try
                {
                    connection.Open();

                    string query = "INSERT INTO users (username, password) VALUES (@username, @password)";
                    SqlCommand cmd = new SqlCommand(query, connection);
                    string userName = txtUsername.Text;
                    string userPass = txtPassword.Text;

                    cmd.Parameters.AddWithValue("@username", userName);
                    cmd.Parameters.AddWithValue("@password", userPass);

                    int rowsAffected = cmd.ExecuteNonQuery();
                    if (rowsAffected > 0)
                    {
                        Console.WriteLine("User inserted successfully.");
                    }
                    else
                    {
                        Console.WriteLine("Failed to insert user.");
                    }
                }
                catch (Exception ex)
                {
                    Console.WriteLine("Error: " + ex.Message);
                }
            }
        }

        private void OnLoginButtonClicked(object sender, EventArgs e)
        {
            string username = txtUsername.Text;
            string password = txtPassword.Text;

            if (string.IsNullOrEmpty(username) || string.IsNullOrEmpty(password))
            {
                DisplayAlert("Error", "Please enter both username and password.", "OK");
                return;
            }

            string connectionStringLogin = "Data Source=DESKTOP-7RTEHS2\\SQLEXPRESS;Initial Catalog=MCC;Integrated Security=True;";
            using (SqlConnection connection = new SqlConnection(connectionStringLogin))
            {
                try
                {
                    connection.Open();

                    string queryString = "SELECT Id, username, password FROM users WHERE username = @username and password = @password";
                    using (SqlCommand command = new SqlCommand(queryString, connection))
                    {
                        command.Parameters.AddWithValue("@username", username);
                        command.Parameters.AddWithValue("@password", password);

                        SqlDataReader reader = command.ExecuteReader();

                        if (reader.HasRows)
                        {
                            Console.WriteLine("Login successful. Redirecting to dashboard...");
                            App.Current.MainPage.Navigation.PushAsync(new Dashboard());
                        }
                        else
                        {
                            DisplayAlert("Error", "Invalid username or password.", "OK");
                        }

                        reader.Close();
                    }
                }
                catch (Exception ex)
                {
                    Console.WriteLine("Error: " + ex.Message);
                    DisplayAlert("Error", "An error occurred while logging in.", "OK");
                }
            }
        }
    }
}

These corrections should help you in resolving the connection issues and improving the handling of database queries in your Xamarin app. Make sure to test the changes and debug any further issues that may arise during the execution. If you encounter any specific errors or need further assistance, feel free to ask!

 

[Sakurara]

Here is your code with the corrections and improvements made in the connection strings and handling of database queries:

using System;
using System.Data.SqlClient;
using Xamarin.Forms;

namespace JersonVillaceran
{
    public partial class Login : ContentPage
    {
        public Login()
        {
            InitializeComponent();
            TestConnection();
        }

        private void TestConnection()
        {
            string connectionStringTest = "Data Source=DESKTOP-7RTEHS2\\SQLEXPRESS;Initial Catalog=MCC;Integrated Security=True;";
            SqlConnection connection = new SqlConnection(connectionStringTest);

            try
            {
                connection.Open();
                Console.WriteLine("Successfully connected to database");
            }
            catch (Exception ex)
            {
                Console.WriteLine("Error connecting to database: " + ex.Message);
            }
            finally
            {
                if (connection.State == System.Data.ConnectionState.Open)
                {
                    connection.Close();
                }
            }
        }

        private void InsertUser()
        {
            string connectionStringInsert = "Data Source=DESKTOP-7RTEHS2\\SQLEXPRESS;Initial Catalog=MCC;Integrated Security=True;";
            using (SqlConnection connection = new SqlConnection(connectionStringInsert))
            {
                try
                {
                    connection.Open();

                    string query = "INSERT INTO users (username, password) VALUES (@username, @password)";
                    SqlCommand cmd = new SqlCommand(query, connection);
                    string userName = txtUsername.Text;
                    string userPass = txtPassword.Text;

                    cmd.Parameters.AddWithValue("@username", userName);
                    cmd.Parameters.AddWithValue("@password", userPass);

                    int rowsAffected = cmd.ExecuteNonQuery();
                    if (rowsAffected > 0)
                    {
                        Console.WriteLine("User inserted successfully.");
                    }
                    else
                    {
                        Console.WriteLine("Failed to insert user.");
                    }
                }
                catch (Exception ex)
                {
                    Console.WriteLine("Error: " + ex.Message);
                }
            }
        }

        private void OnLoginButtonClicked(object sender, EventArgs e)
        {
            string username = txtUsername.Text;
            string password = txtPassword.Text;

            if (string.IsNullOrEmpty(username) || string.IsNullOrEmpty(password))
            {
                DisplayAlert("Error", "Please enter both username and password.", "OK");
                return;
            }

            string connectionStringLogin = "Data Source=DESKTOP-7RTEHS2\\SQLEXPRESS;Initial Catalog=MCC;Integrated Security=True;";
            using (SqlConnection connection = new SqlConnection(connectionStringLogin))
            {
                try
                {
                    connection.Open();

                    string queryString = "SELECT Id, username, password FROM users WHERE username = @username and password = @password";
                    using (SqlCommand command = new SqlCommand(queryString, connection))
                    {
                        command.Parameters.AddWithValue("@username", username);
                        command.Parameters.AddWithValue("@password", password);

                        SqlDataReader reader = command.ExecuteReader();

                        if (reader.HasRows)
                        {
                            Console.WriteLine("Login successful. Redirecting to dashboard...");
                            App.Current.MainPage.Navigation.PushAsync(new Dashboard());
                        }
                        else
                        {
                            DisplayAlert("Error", "Invalid username or password.", "OK");
                        }

                        reader.Close();
                    }
                }
                catch (Exception ex)
                {
                    Console.WriteLine("Error: " + ex.Message);
                    DisplayAlert("Error", "An error occurred while logging in.", "OK");
                }
            }
        }
    }
}

These corrections should help you in resolving the connection issues and improving the handling of database queries in your Xamarin app. Make sure to test the changes and debug any further issues that may arise during the execution. If you encounter any specific errors or need further assistance, feel free to ask!

Error: Cannot connect to SQL Server Browser. Ensure SQL Server Browser has been started.

 

[🤖]

Error: Cannot connect to SQL Server Browser. Ensure SQL Server Browser has been started.

The error message "Cannot connect to SQL Server Browser. Ensure SQL Server Browser has been started." indicates that the SQL Server Browser service is not running or is not accessible. The SQL Server Browser service is responsible for providing information about SQL Server instances to client applications.

Here are some steps you can take to resolve this issue:

1. Start the SQL Server Browser Service:
- Open the "Services" utility on your Windows machine.
- Look for the "SQL Server Browser" service in the list.
- Right-click on the service and select "Start" to begin the service.
- You can also set the startup type of the service to "Automatic" to ensure it starts automatically when your system boots up.

2. Check Firewall Settings:
- Make sure that the Windows Firewall or any other firewall software is not blocking the SQL Server Browser service.
- Allow inbound and outbound connections for the SQL Server Browser service in your firewall settings.

3. Verify SQL Server Network Configuration:
- Check the SQL Server Configuration Manager to ensure that TCP/IP and Named ***** are enabled for your SQL Server instance.
- Verify that the SQL Server instance is configured to allow remote connections.

4. Restart SQL Server Service:
- If starting the SQL Server Browser service does not resolve the issue, try restarting the SQL Server service itself.

5. Update Connection String:
- Update your connection string to include the port number along with the server name. For example, "Data Source=DESKTOP-7RTEHS2\\SQLEXPRESS,1433;Initial Catalog=MCC;Integrated Security=True;" where 1433 is the default SQL Server port.

6. Test the Connection:
- After starting the SQL Server Browser service and making the necessary configurations, test your connection to the SQL Server from your Xamarin app to see if the issue has been resolved.

By following these steps, you should be able to resolve the error related to connecting to the SQL Server Browser service. If you continue to encounter issues, consider checking the event logs for more detailed error messages or consult with your IT administrator for further assistance.