.net中的4种事务总结-3

3 TransactionScope事务
  TransactionScope事务类，它可以使代码块成为事务性代码。并自动提升为分布式事务
 优点：实现简单，同时能够自动提升为分布式事务
Demo:

TransactionScope事务
 /**//// <summary>
        /// TransactionScope事务:可自动提升事务为完全分布式事务的轻型（本地）事务。 
        /// 使用时要保证MSDTC服务(控制分布事务)是开启的可以使用:net start msdtc命令开启服务;
        /// </summary>
        public void ADONetTran2()
        {
             SqlConnection conn = new SqlConnection("Data Source=127.0.0.1;Initial Catalog=Northwind;Persist Security Info=True;User ID=sa;Password=123;");
             SqlCommand cmd = new SqlCommand();
            try
            {
              
                using (System.Transactions.TransactionScope ts = new TransactionScope())
                {
                    
                    cmd.CommandText = "Update Region Set RegionDescription=@UpdateValue where RegionID=@UpdateID";
                    cmd.CommandType = CommandType.Text;
                    cmd.Connection = conn;
                    conn.Open();
                    SqlParameter[] paras = new SqlParameter[]{
                                        new SqlParameter ("@UpdateID",SqlDbType.Int,32),
                                        new SqlParameter ("@UpdateValue",SqlDbType .NChar,50)};
                    paras[0].Value = "2";
                    paras[1].Value = "Update Value12";

                    foreach (SqlParameter para in paras)
                    {
                        cmd.Parameters.Add(para);
                    }
                    cmd.ExecuteNonQuery();


                    cmd.CommandText = "insert into Region values(@InsertID,@InsertValue)";
                    cmd.CommandType = CommandType.Text;

                    paras = new SqlParameter[]{
                                        new SqlParameter ("@InsertID",SqlDbType.Int ,32),
                                        new SqlParameter ("@InsertValue",SqlDbType.NChar ,50)};
                    paras[0].Value = "8";
                    paras[1].Value = "Insert Value";

                    cmd.Parameters.Clear();
                    foreach (SqlParameter para in paras)
                    {
                        cmd.Parameters.Add(para);
                    }

                    cmd.ExecuteNonQuery();
                    //提交事务
                    ts.Complete();
                }
            }
            catch
            {
                throw;
            }
            finally
            {
                conn.Close();
            }

        }