Question

This is my code that is meant to connect to a MySQL server and fetch some info:

using System;
using System.Collections.Generic;
using System.Text;
using System.Data.SqlClient;

namespace test_MLDropCopy
{
    class Program
    {
        static void Main(string[] args)
        {
            string connectionString = "server=xxxxx;uid=xxxxx;pwd=xxxxx";

            SqlConnection mySqlConnection = new SqlConnection(connectionString);

            string selectString = "select Symbol from today_positions.all_rttp where ServiceName like 'ML%' and ID = 137800";

            SqlCommand mySqlCommand = mySqlConnection.CreateCommand();

            mySqlConnection.Open(); 

            mySqlCommand.CommandText = selectString;

            SqlDataReader myReader = null;

            myReader = mySqlCommand.ExecuteReader();

            string Symbol = myReader["Symbol"].ToString();

            Console.WriteLine(Symbol);

            mySqlConnection.Close();


        }
    }
}

However, this is the error I’m getting:

Unhandled Exception: System.Data.SqlClient.SqlException: A network-related or in
stance-specific error occurred while establishing a connection to SQL Server. Th
e server was not found or was not accessible. Verify that the instance name is c
orrect and that SQL Server is configured to allow remote connections. (provider:
 Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)

I have double checked the login credentials I am using. Is there a problem in my code, or is the problem from the database end (offline, inadequate permissions etc.) ?

Answer 1

The SqlConnection class is not the base class for a DB connection; its purpose is to connect to MS SQL Server DBs. What you want is a basic OleDbConnection or OdbcConnection; I would use OleDb if your MySql instance supports it.