namespace 事务处理
{
public class SqlHelper
{
public static string GetConnection()
{
string connStr = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
return connStr;
}
public static int ExecuteNonQuery(Transaction transaction,string sql,params MySqlParameter[] parameters)
{
int result = -1;
using (MySqlConnection conn = new MySqlConnection(GetConnection()))
{
conn.Open();
if (null != transaction)
{
conn.EnlistTransaction(transaction); //将连接登记到事务
}
using (MySqlCommand cmd = conn.CreateCommand())
{
cmd.CommandText = sql;
cmd.Parameters.AddRange(parameters);
result = cmd.ExecuteNonQuery();
}
}
return result;
}
public static DataTable ExecuteDataTable(string sql, params MySqlParameter[] parameters)
{
using (MySqlConnection conn = new MySqlConnection(GetConnection()))
{
using (MySqlCommand cmd = conn.CreateCommand())
{
cmd.CommandText = sql;
cmd.Parameters.AddRange(parameters);
using (MySqlDataAdapter da = new MySqlDataAdapter(cmd))
{
using (DataSet ds = new DataSet())
{
da.Fill(ds);
return ds.Tables[0];
}
}
}
}
}
}
}
创建基于 Transaction 类的分布式显式事务步骤如下：
1）实例化一个可提交的CommittableTransaction对象；
2）将要参与事务的连接通过MySqlConnection对象的EnlistTransaction(Transaction transaction)登记到上一步创建的CommittableTransaction对象上；
3）如果事务可以成功完成，使用CommittableTransaction对象的Commit()方法提交事务处理结果；
4）如果事务处理中发生错误，就调用CommittableTransaction对象的Rollback()方法，撤销每一个修改。