How to check for NULL in MySqlDataReader by the co

Question

How can I check for a NULL value in an open MySqlDataReader?

The following doesn't work; it's always hitting the else:

if (rdr.GetString("timeOut") == null)
{
    queryResult.Egresstime = "Logged in";
}
else
{
    queryResult.Egresstime = rdr.GetString("timeOut");
}

rdr.IsDbNull(int i) only accepts a column number, not name.

Answer 1

var ordinal = rdr.GetOrdinal("timeOut");
if(rdr.IsDBNull(ordinal)) {
  queryResult.Egresstime = "Logged in";
} else {
  queryResult.Egresstime = rdr.GetString(ordinal);
}//if

or

if(Convert.IsDBNull(rdr["timeOut"])) {
  queryResult.Egresstime = "Logged in";
} else {
  queryResult.Egresstime = rdr.GetString("timeOut");
}//if

Answer 2

if(rdr.GetString("timeOut") == DBNull.Value)

null is not the same as DBNull

I am sorry, wrong answer, Sam B is right. I mistook this for DataRow stuff.

SqlDataReader does have strongly typed GetString() and provides IsDBNull(int column) for this case.