I am working on a project where a series of ranges are to be administered. The ranges are associated with a certain value. Say that a sales associate is at 20% commission when his sales are from 0 to 3 million, and after 3 million, the commission goes up to 25%. This data is stored in tabular format in the database, but administering the data through a tabular grid view was getting very difficult to maintain and administer. It was difficult to prevent the user from creating gaps or overlap in the ......