SqlConnectionStringBuilder sqlb = new SqlConnectionStringBuilder();
            sqlb.DataSource = "ip address";
            sqlb.InitialCatalog = "databasename";
            sqlb.UserID = "username";
            sqlb.Password = "password";
            sqlb.IntegratedSecurity = false;
            sqlb.Pooling = true;
            SqlConnection conn = new SqlConnection();
            conn.ConnectionString = sqlb.ConnectionString;
            conn.Open();
conn.Close();
原文:https://www.cnblogs.com/lionmxs/p/12115011.html