passing custom object to oracle parameters in stored procedure

create type smp_emp_type as object
  (id number(3), name varchar2(30), gender varchar2(1)) NOT FINAL;

create table smp_emp
(id number(3), name varchar2(30), gender varchar2(1)) ;

CREATE OR REPLACE procedure ins1 (emp IN smp_emp_type) as
 begin
    Insert into smp_emp  values (emp.id,emp.name,emp.gender);
end

CREATE OR REPLACE procedure upd1 (emp IN smp_emp_type) as
 begin
   update smp_emp e set e.name =emp.name,e.gender = emp.gender where id = emp.id;
end

update_pro updobj = new update_pro();
           updobj._Id = Convert.ToInt16(textBox1.Text);
           updobj._Name = textBox2.Text;
           updobj._Gender = textBox3.Text;
           OracleConnection conn = new OracleConnection("Data Source=r2;User ID=test;Password=test;");
           conn.Open();

           OracleCommand cmd = new OracleCommand("upd1", conn);
           OracleParameter emp_obj = new OracleParameter();
           emp_obj.OracleDbType = OracleDbType.Object;
           emp_obj.Direction = ParameterDirection.Input;
           emp_obj.UdtTypeName = "SMP_EMP_TYPE";
           emp_obj.Value = updobj;
           cmd.Parameters.Add(emp_obj);
           cmd.ExecuteNonQuery();