微软企业库中的事务处理

public bool Transfer(int transactionAmount, int sourceAccount, int destinationAccount)        {            bool result = false;                        // Create the Database object, using the default database service. The            // default database service is determined through configuration.            Database db = DatabaseFactory.CreateDatabase();            // Two operations, one to credit an account, and one to debit another            // account.            string sqlCommand = "CreditAccount";            DBCommandWrapper creditCommandWrapper = db.GetStoredProcCommandWrapper(sqlCommand);            creditCommandWrapper.AddInParameter("@AccountID", DbType.Int32, sourceAccount);            creditCommandWrapper.AddInParameter("@Amount", DbType.Int32, transactionAmount);            sqlCommand = "DebitAccount";            DBCommandWrapper debitCommandWrapper = db.GetStoredProcCommandWrapper(sqlCommand);            debitCommandWrapper.AddInParameter("@AccountID", DbType.Int32, destinationAccount);            debitCommandWrapper.AddInParameter("@Amount", DbType.Int32, transactionAmount);            using (IDbConnection connection = db.GetConnection())            {                connection.Open();                IDbTransaction transaction = connection.BeginTransaction();                try                {                    // Credit the first account                    db.ExecuteNonQuery(creditCommandWrapper, transaction);                    // Debit the second account                    db.ExecuteNonQuery(debitCommandWrapper, transaction);                    // Commit the transaction                    transaction.Commit();                                        result = true;                }                catch                {                    // Rollback transaction                     transaction.Rollback();                }                connection.Close();                                return result;            }

在这段例子代码中，其核心就是关于 IDbTransaction 的使用。

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自企业库2.0以后，存储过程的command方式有所改变，自至5.0为止都是如下写法

        Database DataBase = default(Database);        DbCommand dbCommand = DataBase.GetStoredProcCommand("MCS_GET_SEQUENCE");        DataBase.AddInParameter(dbCommand, "I_TABLE_NAME", DbType.String, strTable);        DataBase.AddOutParameter(dbCommand, "O_CUR_SEQUENCE", DbType.Int16,10);        DataBase.ExecuteNonQuery(dbCommand);        strSeqNo = Convert.ToInt16(DataBase.GetParameterValue(dbCommand, "O_CUR_SEQUENCE"));

using connection的写法也变，新版本为

using (IDbConnection connection = db.CreateConnection())