The Repeating Section control allow the user to enter line-item details for multiple columns that you specify as the form designer. The end user can click an “Add new row” button to instantly append another line of empty input controls to be entered with the next line of detail.
The user can add new details right in the parent form without a popup or switching to another form. Furthermore, as a designer you can use all the various control types within a repeating section. For instance, I’ve used a drop-down choice for the Unit of Measure, and a Calculated Value field for the Extended Cost which is able to calculate the line total of the current line in the Repeating Section with a formula that multiplies the Quantity and Unit Cost entered by the user.
The downside is that the Repeating Section details are not added to a SharePoint list. This means you won’t be able to report on aggregate results of the detail data. You can bind the Repeating Section to a multiline text column. That should be useful for something, right?
Well…here’s what it looks like.