TransactionScope
.NET Framework 2.0 版中新增的 TransactionScope 单独使用确实很方便。但是在实际项目中都有自己的访问层,如何才能和自己的数据访问层结合起来使用呢?
在项目中我是这样处理数据的:
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上面 OutSourcing 为与表相对应的实体类 ;DAHelper 为作者自己实现的一个包装类,可以对任意实体进行增加,修改,删除 查询等功能。
再贴一段代码:
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我最终通过调用 ExecSql 方法来与数据库交互,而该方法会自己打开数据库连接,执行语句,然后关闭连接。
在操作同一个数据库的时候,如果要高效的使用 TransactionScope,必须保证 SqlConnection 不改变,即用同一个 SqlConnection 来完成所需要的增加
删除,或修改。我想写这样的代码进行事务控制:
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这样就需要,执行第一个操作时候打开数据库连接,执行,不关闭连接,然后执行第二个操作,执行完关闭。显然,我想让 TransactionScope 在
实行 Dispose() 方法的时候关闭数据库连接。using 代码块的本质上等同于 try{}finally{} 语句代码块。为什么不封装一下 TransactionScope 让它满足自己的要求呢?
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数据库访问类代码如下:
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赶快写个方法测试一下吧!
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查看一下输入的结果
下面是使用事务的输出。。。。。。。。
打开数据库连接;
执行 Sql 语句。。。
执行 Sql 语句。。。
关闭数据库连接->该方法由 Scope中的Dispose()方法调用
*********************下面是 未 使用事务的输出。。。。。。。。
打开数据库连接;
执行 Sql 语句。。。
未使用事务 关闭数据库连接;
打开数据库连接;
执行 Sql 语句。。。
未使用事务 关闭数据库连接;
输出结果和想像中的完全一样 数据库也正确(没任何原因不正确!)
最后 改变一下方法:
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熟悉数据库的肯定知道 “将截断字符串或二进制数据”吧!
输出结果为:
下面是使用事务的输出。。。。。。。。
打开数据库连接;
执行 Sql 语句。。。
执行 Sql 语句。。。
关闭数据库连接->该方法由 Scope中的Dispose()方法调用
出现了异常????????????
数据库一条记录没有增加 数据库连接已经关闭 测试结果完全满意!
对自己访问层稍做修改:
最终的代码为:
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posted on 2013-08-20 19:58 YoungPop_Chen 阅读(197) 评论(0) 编辑 收藏 举报