Hi All,<BR> I am having a Data Grid with 2 columns. In each column I will be having a dropdown list box . When ever I select an Item in first dropdownlist I must populate second combo with values based on the first. I should not access the database for populating the second combo. So while binding the grid itself I am getting the whole data for both the dropdownlists. and hiding them in the hidden field. Can any one tell me how to populate the second combo by selecting the data from the hidden field.<BR>Thanking you in advance,<BR>chandra sekhar.