C#.net-oracle procedure problem

[inancigdem]

hello,
I have a table which has coloumns like resim_ad and resim_id
I want to select resim_ad according to resim_id
I wrote a procedure for it


create or replace procedure pro (r_id in varchar2,r_ad out varchar2) is
begin
select resim_adi
into r_ad


from tablo_resim where resim_id=r_id;
dbms_output.put_line(r_ad);
end;


The procedure works without error.I want to call and use this procedure in .net
I have dropdown list which has resim_id's of tablo_resim.And There is a textbox that
I want to show resim_ad's of tablo_resim.Sending parameter must be resim_id.
Here is my code

String secim;

secim = (this.DropDownList1.SelectedItem.Text);

OracleConnection conn = new OracleConnection();
if( OracleConnection.IsAvailable == true )
{
conn.ConnectionString = "context connection=true";
}
else
{

conn.ConnectionString = "Data Source=xe;User iD=system;Password=proje";
}

conn.Open();

OracleCommand cmd = conn.CreateCommand();
cmd.CommandText = "SELECT resim_adi FROM tablo_resim WHERE resim_id= :secim";
cmd.Parameters.Add(":secim",OracleDbType.Varchar2, secim,
System.Data.ParameterDirection.Input);
OracleDataReader rdr = cmd.ExecuteReader();

How can I show resim_ad's of tablo_resim in the textbox?
Please help me!!
Kind regards