Previously I came across a requirement to provide a functionality of something similar to a traditional combo box (found in Windows Forms) and a sort of multicolumn combo box in ASP.NET. I searched a lot on the net but found nothing suitable for my requirements. So, I decided to write my own control from scratch and here is what I call a multicolumn combo box. It is a combo box but with multiple columns and a textbox. You can search a particular row by typing the key column value in the textbox.
