I want that DropDownList controls show only one column of data when they are rendered, but when the user clicks on it that it shows three columns of data. Is that possible?

I tried modifying the properties directly in the aspx file , but I can't figure it out. (if I use the PopulationDataSourceSettings, the field for Drop-Down Display Format String is dimmed and I can't set it up.

Thanks

Hugo

Multiple columns aren't supported on web comboboxes. You can, however, have different drop-down and display values if you use the strataframe drop down rather than the standard .net.  This could allow you to show the data you are wanting in the drop down value, it just can't utilize multiple columns.