Question

我是C＃程序员。我想清除这个复杂的概念。

如果有2个数据库：A和B.假设我想在两者中插入记录，但首先在A中然后在B中插入记录。说如果在db B中插入时发生异常。情况是，如果B崩溃，还应回滚与db A的事务。我该怎么办？

我知道我可以将SqlTransaction对象与SqlConnectionString类一起使用。我可以为此提供一些代码吗？

Answer 1

此处已经问过：Implementing transactions over multiple databases。

keithwarren7的最佳答案：

像这样使用TransactionScope类

using(TransactionScope ts = new TransactionScope())
{
  //all db code here

  // if error occurs jump out of the using block and it will dispose and rollback

  ts.Complete();
}

如有必要，该类将自动转换为分布式事务。

编辑：在原始答案中添加说明

您在MSDN中有一个很好的例子：http://msdn.microsoft.com/fr-fr/library/system.transactions.transactionscope%28v=vs.80%29.aspx。

此示例显示如何在一个TransactionScope中使用2个数据库连接。

    // Create the TransactionScope to execute the commands, guaranteeing
    // that both commands can commit or roll back as a single unit of work.
    using (TransactionScope scope = new TransactionScope())
    {
        using (SqlConnection connection1 = new SqlConnection(connectString1))
        {
            try
            {
                // Opening the connection automatically enlists it in the 
                // TransactionScope as a lightweight transaction.
                connection1.Open();

                // Create the SqlCommand object and execute the first command.
                SqlCommand command1 = new SqlCommand(commandText1, connection1);
                returnValue = command1.ExecuteNonQuery();
                writer.WriteLine("Rows to be affected by command1: {0}", returnValue);

                // If you get here, this means that command1 succeeded. By nesting
                // the using block for connection2 inside that of connection1, you
                // conserve server and network resources as connection2 is opened
                // only when there is a chance that the transaction can commit.   
                using (SqlConnection connection2 = new SqlConnection(connectString2))
                    try
                    {
                        // The transaction is escalated to a full distributed
                        // transaction when connection2 is opened.
                        connection2.Open();

                        // Execute the second command in the second database.
                        returnValue = 0;
                        SqlCommand command2 = new SqlCommand(commandText2, connection2);
                        returnValue = command2.ExecuteNonQuery();
                        writer.WriteLine("Rows to be affected by command2: {0}", returnValue);
                    }
                    catch (Exception ex)
                    {
                        // Display information that command2 failed.
                        writer.WriteLine("returnValue for command2: {0}", returnValue);
                        writer.WriteLine("Exception Message2: {0}", ex.Message);
                    }
            }
            catch (Exception ex)
            {
                // Display information that command1 failed.
                writer.WriteLine("returnValue for command1: {0}", returnValue);
                writer.WriteLine("Exception Message1: {0}", ex.Message);
            }
        }

        // The Complete method commits the transaction. If an exception has been thrown,
        // Complete is not  called and the transaction is rolled back.
        scope.Complete();
    }

Answer 2

如果您只想拥有一个连接并且喜欢管理这些内容，那么您可以使用Linked Server并从服务器A调用SP，该服务器可以从服务器B调用SP

：）

在这种情况下如何处理sql事务？

2 个答案: