Hi Nitesh,
You are using the Hana ODBC driver but you are using OLEDB in your connection string? I am not sure if that is correct.
Can you try this connection string instead?
string connectionstring = ("DRIVER={HDBODBC32};UID=" + username + ";PWD=" + passwort + ";SERVERNODE=" + serverAdresse + ":" + port + ";DATABASENAME="+databasename);
Furthermore have you / can you install both Hana Clients (64 bit and 32 bit) and configure a System DSN for both (HDBODBC and HDBODBC32) in the ODBC Data Source Administrator?
Best regards
Ercin Nurol