.net 事务

string connString = WebConfigurationManager.ConnectionStrings"ConnectionString".ConnectionString;
SqlConnection conn = new SqlConnection(connString);
conn.Open();
SqlTransaction tran = conn.BeginTransaction(); //创建事务Transaction

string strSQL = "INSERT INTO Employees(FirstName, LastName, City, Address) values (@paramFirstName,@paramLastName,@paramCity,@paramAddress)";
SqlCommand cmd = new SqlCommand(strSQL, conn,tran); //创建SqlCommand

try
{
cmd.Parameters.Add("@paramFirstName", SqlDbType.NVarChar, 20).Value = txtFirstName.Text;
cmd.Parameters.Add("@paramLastName", SqlDbType.NVarChar, 10).Value = txtLastName.Text;
cmd.Parameters.Add("@paramCity", SqlDbType.NVarChar, 15).Value = txtCity.Text;
cmd.Parameters.Add("@paramAddress", SqlDbType.NVarChar, 60).Value = txtAddress.Text;
cmd.ExecuteNonQuery();
tran.Commit(); //确认事务
txtMsg.Text = "新增数据成功,事务确认!";
}
catch
{
tran.Rollback(); //事务回滚
txtMsg.Text = "新增数据失败,事务Rollback!";
}

finally
{
conn.Close();
conn.Dispose();
tran.Dispose();
cmd.Dispose();
}