ORA-01840: input value not long enough for date format when executing a query with a timestamp parameter - oracle

Question

I am trying to execute a query on Oracle database table with a TimeStamp(6) column, using odp.net
I am using below code, which throws this exception: "ORA-01840: input value not long enough for date format".
OracleConnection con = new OracleConnection(connStr");
using (con)
{
con.Open();
OracleCommand command = con.CreateCommand();
command.CommandText = "SELECT * FROM Logs WHERE LOGDATE > :logDate";
command.CommandType = System.Data.CommandType.Text;
command.Parameters.Add(new OracleParameter("logDate", OracleDbType.TimeStamp, DateTime.Now.AddMonths(-1), ParameterDirection.Input));
using (command)
{
OracleDataReader rdr = command.ExecuteReader(); //ORA-01840 exception is thrown here
}
}
What is wrong about this query and it's parameters? I also tried OracleDbType.Date, instead of OracleDbType.TimeStamp but i got the same error.

Answer 1

I solved the problem by passing an OracleTimeStamp object instead of DateTime object. Below code works good:
OracleConnection con = new OracleConnection(connStr");
using (con)
{
con.Open();
OracleCommand command = con.CreateCommand();
command.CommandText = "SELECT * FROM Logs WHERE LOGDATE > :logDate";
command.CommandType = System.Data.CommandType.Text;
command.Parameters.Add(new OracleParameter("logDate", OracleDbType.TimeStamp, new OracleTimeStamp(DateTime.Now.AddMonths(-1)), ParameterDirection.Input));
using (command)
{
OracleDataReader rdr = command.ExecuteReader(); //ORA-01840 exception was thrown here
}
}