inserting data into orcale table from a gridview control

protected void btnAnonyCourse_Click(object sender, EventArgs e)
    {
        OracleConnection con = null;
        OracleCommand cmd = null;
        try
        {
            con = new OracleConnection("Data Source=; User ID=;Password=");
            cmd = new OracleCommand();
            cmd.CommandType = CommandType.StoredProcedure;
            cmd.Connection = con;
            cmd.CommandText = "GEN_ANONY_ID_COURSECODE";
            con.Open();
            foreach (GridViewRow row in gvAcademy.Rows)
            {
                // if (row.RowType == DataControlRowType.DataRow)
                {
                    string studRef = ((Label)row.FindControl("lblStudRef")).Text;
                    cmd.Parameters.Add("va_S_STUDENTREFERENCE", studRef).DbType = DbType.String;
                    cmd.ExecuteNonQuery();
                    cmd.Parameters.Clear();
                    lblMsg.Text = "Anonymous IDs by Course have been generated successfully";
                }
            }
        }
        catch (Exception ex)
        {
            lblMsg.Text = "<b>Message:</b> " + ex.Message;
        }
        finally
        {
            cmd.Dispose();
            con.Dispose();
        }
    }
   
==============================
CREATE OR REPLACE PROCEDURE HE_REPORTING_DATABASE.GEN_ANONY_ID_COURSECODE

(va_S_STUDENTREFERENCE IN VARCHAR2)

AS

BEGIN

INSERT INTO HE_STORE_ANONYMOUS_ID
    (P_ID,
   S_STUDENTREFERENCE,
   M_REFERENCE,
   M_NAME,
   MI_ILRA11X1,
   VC_NAME,
   S_LEGACY,
   M_START,
   M_END,
   M_CLOSE,
   P_SURNAME,
   P_FORENAMES    
   )
SELECT   P_ID,
   S_STUDENTREFERENCE,
   M_REFERENCE,
   M_NAME,
   MI_ILRA11X1,
   VC_NAME,
   S_LEGACY,
   M_START,
   M_END,
   M_CLOSE,
   P_SURNAME,
   P_FORENAMES  
FROM HE_GET_ANONYMOUS_ID
WHERE   S_STUDENTREFERENCE = va_S_STUDENTREFERENCE
  AND NOT EXISTS( SELECT NULL FROM HE_STORE_ANONYMOUS_ID WHERE S_STUDENTREFERENCE = va_S_STUDENTREFERENCE );

COMMIT;

End GEN_ANONY_ID_COURSECODE;
/
                              

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