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c#事务用法

 
/////ado.net1.0中使用Transacation(事务)
string connectionString = "database=Northwind;pwd=admin;uid=sa;server=DATABASE-VPC\\SQL2005";
using (SqlConnection conn = new SqlConnection(connectionString))
{
    conn.Open();
    SqlTransaction transaction = conn.BeginTransaction();
    try
    {
        using (SqlCommand cmd = new SqlCommand())
        {
            cmd.Connection = conn;
            cmd.CommandType = CommandType.Text;
            cmd.CommandText = "";
            cmd.Transaction = transaction;
            cmd.ExecuteNonQuery();
            transaction.Commit();//提交事务
        }
    }
    catch
    {
        transaction.Rollback();//事务回滚
    }
}
/////2.0中使用事务
string connectionString = "database=Northwind;pwd=admin;uid=sa;server=DATABASE-VPC\\SQL2005";
string connectionStringTwo = "database=Test;pwd=admin;uid=sa;server=DATABASE-VPC\\SQL2005";
using (TransactionScope transaction = new TransactionScope())//使用事务
{
    try
    {
        using (SqlConnection conn = new SqlConnection(connectionString))
        {
            using (SqlCommand cmd = new SqlCommand())
            {
                cmd.CommandText = "insert into [member] (name) values (‘test‘)";
                cmd.CommandType = CommandType.Text;
                cmd.Connection = conn;
                conn.Open();
                cmd.ExecuteNonQuery();
            }
        }
        using (SqlConnection conn = new SqlConnection(connectionStringTwo))
        {
            using (SqlCommand cmd = new SqlCommand())
            {
                cmd.CommandText = "insert into [member] (name) values (‘test‘)";
                cmd.CommandType = CommandType.Text;
                cmd.Connection = conn;
                conn.Open();
                cmd.ExecuteNonQuery();
            }
        }
        transaction.Complete();//就这句就可以了。
    }
    catch (Exception ex) { MessageBox.Show(ex.Message); }
}
/*ado.net1.0与ado.net2.0中对比
1.0中不能跨数据库,速度慢
2.0中可以跨数据库,2.0中不再使用com+,速度比1.0快50%(因为它不用把大量的时间消耗在查找在com+中)
2.0中的事务会自动判断使用何种事务(不用您考虑是简单事务还是分部式事务)。
2.0中的Transactions新添加了命名空间。没有com+注册和com+的开销。
*/