private void btnSambungkan_Click(object sender, EventArgs e)
        {
            if (!CommonFunction.validasi(cmbJenisDatabase, txtServer, txtUsername, txtPassword))
            {
                return;
            }

            string username = txtUsername.Text;
            string password = txtPassword.Text;
            string server   = txtServer.Text;

            if (cmbJenisDatabase.Text == "SQLSERVER")
            {
                koneksiSqlServer = new LibraryFramework.DatabaseSqlServer.Koneksi(username, password, server, "master");
                if (!koneksiSqlServer.Login())
                {
                    return;
                }

                dataDatabaseSqlServer = new DataDatabaseSqlServer(koneksiSqlServer.Con);
                CommonFunction.setCombo(cmbDatabase, dataDatabaseSqlServer.getDatabase(), "database_name", "database_name", 0, 0);
            }
            else
            {
                koneksiMySql = new LibraryFramework.DatabaseMySql.Koneksi(username, password, server, "test");
                if (!koneksiMySql.Login())
                {
                    return;
                }

                dataDatabaseMySql = new DataDatabaseMySql(koneksiMySql.Con);
                CommonFunction.setCombo(cmbDatabase, dataDatabaseMySql.getDatabase(), "database", "database", 0, 0);
            }
            cmbJenisDatabase.Enabled = false;
            txtServer.Enabled        = false;
            txtUsername.Enabled      = false;
            txtPassword.Enabled      = false;
        }