C#

2 or 1=1; delete from CompTax --

cmd.CommandText = @"UPDATE CompTax SET
TeorBohen = @TeorBohen,
TechName = @TechName,
TipolDate = @TipolDate,
TipolStartHouse = @TipolStartHour,
Statos = @Statos
WHERE CartisNum = @CartisNum";
cmd.Parameters.Add("@TeorBohen", SqlDbType.NVarChar, 40).Value =RbTeorBohen.Text;
cmd.Parameters.Add("@TechName", SqlDbType.NVarChar, 128).Value = tbTech.Text;
cmd.Parameters.Add("@TipolDate", SqlDbType.DateTime).Value = dt1;
// ... on and on ...
try
{
  conn.Open();
  cmd.ExecuteNonQuery();
}
finally
{
  conn.Close();
}

cmd.Parameters.Add("@TeorBohen", OleDbType.VarChar, 80).Value = RbTeorBohen.Text;
cmd.Parameters.Add("@CartisNum", OleDbType.Integer).Value = int.Parse(lbCartisNum.Text);