The name 'datagrid' does not exist in the current context

private void ReadRecords()
        {
            OleDbConnection conn = null;
            OleDbDataReader reader = null;

            try
            {
            
                conn.Open();

                OleDbCommand cmd = new OleDbCommand("Select * FROM nifty_daily", conn);
                reader = cmd.ExecuteReader();

                datagrid.DataSource = reader;
                datagrid.DataBind();
            }

            finally
            {
                if (reader != null) reader.Close();
                if (conn != null) conn.Close();
            }
        }
    }