Lütfen - Acil yardım (MySql)

/ilk olarak bi baglantı açıyoruz
SqlConnection sqlConn =new SqlConnection();
sqlConn.ConnectionString = "server=lab4-hoca;user=sa;pwd=a;database=Northwind;";
//connection string ile hangi  bilgisayarın hangi data baseine  hangi kullanıcı adı we şifryle baglanılacagını belirler
sqlConn.Open();//baglantı kurulur

SqlCommand sqCom = new SqlCommand();
sqCom.Connection = sqlConn;
sqCom.CommandText = "select * from products";
sqCom.CommandType = CommandType.Text;

sqCom.ExecuteScalar();

DataTable dtProd = new DataTable();
SqlDataAdapter sqDa = new SqlDataAdapter();
sqDa.SelectCommand = sqCom;
//data adapter e bu komutun selectmi updatemi insertmi deletemi oldugunu belirlemeliyim
sqDa.Fill(dtProd);// data table ı doldurur
dataGridView1.DataSource = dtProd;// gridde gostermeyi saglar

<connectionStrings>
		<add name="KullaniciString" 
connectionString="Data Source=server ipsi ;Initial Catalog= DB Adı;User ID= Kullanıcı Adı ;Password=Şifre" providerName="System.Data.SqlClient"/>
</connectionStrings>

private void button3_Click(object sender, RoutedEventArgs e)
        {
            try
            {
                string MyConString = "SERVER=http://91.227.6.30:3306;" +
                    "DATABASE=ciltvesa_vadi;" +
                    "UID=ciltvesa_vkuladi;" +
                    "PASSWORD=123;";
                MySqlConnection connection = new MySqlConnection(MyConString);
                MySqlCommand command = connection.CreateCommand();
                MySqlDataReader Reader;
                command.CommandText = "select * from uyeler";
                connection.Open();
                Reader = command.ExecuteReader();
                while (Reader.Read())
                {
                    string thisrow = "";
                    for (int i = 0; i < Reader.FieldCount; i++)
                        thisrow += Reader.GetValue(i).ToString() + ",";
                    listBox1.Items.Add(thisrow);
                }
                connection.Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
 
            }
        }

        private void button4_Click(object sender, RoutedEventArgs e)
        {
            try
            {

                MySqlConnectionStringBuilder bag = new MySqlConnectionStringBuilder();
                bag.Server = "http://91.227.6.30:3306";//örn: csharptr.com
                bag.Database = "ciltvesa_vadi";
                bag.UserID = "ciltvesa_vkuladi";
                bag.Password = "123";


                MySqlConnection baglanti = new MySqlConnection(bag.ToString());
                baglanti.Open();

                string sorgu = "Select * From uyeler";//Örnek sorgu
                MySqlDataAdapter adaptor = new MySqlDataAdapter(sorgu, baglanti);
                DataTable tablo = new DataTable();
                adaptor.Fill(tablo);
                dataGrid1.DataContext = tablo;
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);

            }

string MyConString = "SERVER=http://91.227.6.30:3306" +
                    "DATABASE=ciltvesa_vadi" +
                    "UID=ciltvesa_vkuladi" +
                    "PASSWORD=123";