Export OracleDataReader to Excel in C#

I have a code like this,

string ConnectionString = ConfigurationManager.ConnectionStrings["ora"].ConnectionString;

OracleConnection conn = new OracleConnection(ConnectionString);

string sql = @"SELECT DISTINCT(B.MUS_K_ISIM), A.HESAP_NO
  FROM S_TAKIP_MUSTERI A, S_TEKLIF B
  WHERE A.HESAP_NO = B.HESAP_NO
  ORDER BY B.MUS_K_ISIM";

conn.Open();

OracleCommand cmd = new OracleCommand(sql, conn);
cmd.CommandType = System.Data.CommandType.Text;

OracleDataReader dr = cmd.ExecuteReader(System.Data.CommandBehavior.CloseConnection);

How can i export coming so开发者_Go百科me information from DataReader to Excel? What i want, When i click the button, Export the Excel from DataReader.

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You could use Microsoft.Office.Interop.Excel to create an instance of excel and then go through and populate the cells in the spreadsheet with the data.