How to connect to mysql from C# over SSH

I don't think MySql and the MySqlClient support such a thing. The connection string is specifically for the database. You will need an SSH client to connect first to the SSH server and then find a way to route the Sql connection over that tunnel.

http://www.howtogeek.com/howto/ubuntu/access-your-mysql-server-remotely-over-ssh/

I don't think there is a Microsoft .Net library for handling SSH connections but there is an open source project on Code Plex that might help.

http://sshnet.codeplex.com/

        // using Renci.sshNet 

        PasswordConnectionInfo connectionInfo = new PasswordConnectionInfo(hostAdres, hostNaam, wachtwoord);
        connectionInfo.Timeout = TimeSpan.FromSeconds(30);
        var client = new SshClient(connectionInfo);
        client.Connect();
        ForwardedPortLocal portFwld = new ForwardedPortLocal("127.0.0.1", Convert.ToUInt32(hostpoort), DataBaseServer, Convert.ToUInt32(remotepoort)); client.AddForwardedPort(portFwld);
        portFwld.Start();
        
        var connection = new MySqlConnection("server = " + "127.0.0.1" + "; Database = database; password = PWD; UID = yourname; Port = 22");
        connection.Open();

I tried all the previous steps and it didn't work, the method that worked for me was the following:

            try
            {
                using(var client = new SshClient("ssh server id", "sshuser", "sshpassword")) // establishing ssh connection to server where MySql is hosted
                {
                    client.Connect();
                    if (client.IsConnected)
                    {
                        var portForwarded = new ForwardedPortLocal("127.0.0.1", 3306, "127.0.0.1", 3306);
                        client.AddForwardedPort(portForwarded);
                        portForwarded.Start();
                        using (MySqlConnection con = new MySqlConnection("SERVER=127.0.0.1;PORT=3306;UID=someuser;PASSWORD=somepassword;DATABASE=DbName"))
                        {
                            using (MySqlCommand com = new MySqlCommand("SELECT * FROM tableName", con))
                            {
                                com.CommandType = CommandType.Text;
                                DataSet ds = new DataSet();
                                MySqlDataAdapter da = new MySqlDataAdapter(com);
                                da.Fill(ds);
                                foreach (DataRow drow in ds.Tables[0].Rows)
                                {
                                    Console.WriteLine("From MySql: " + drow[1].ToString());
                                }
                            }
                        }
                        client.Disconnect();
                    }
                    else
                    {
                        Console.WriteLine("Client cannot be reached...");
                    }
                }
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
            }