The number of repetitions (i.e. the number of displayed Controls) is based on the number of records in a data set. In essence the Repeater is similar to a ForEach loop, but where ForEach allows you to add Actions to the loop, Repeater allows you to add Controls to the 'loop' and to set up an Event that triggers when a list item is loaded.

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Properties

1. Inline

   Affects the 'display' CSS property of the control. When Inline is selected the controls that are added to the Repeater will display horizantally; when Inline is not selected the controls will display vertically.

2. Visible

   Set to False if you don't want this control to render on the page and be visible to the user.

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Events

1. Item Load

   An event that triggers when a list item is loaded.

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How to use a Repeater

1. Build the template
   Add a Repeater control, then drag the required controls like Labels and Buttons into your Repeater.
   
2. Map the data
   Create an ItemLoad event on your Repeater.
   The ItemLoad event passes in the single item out of your dataset it is currently loading into an iteration of your repeater. Use the properties of this item to map them to the controls in the Repeater.
   
3. Assign the data
   Use a Load event to start the process of assigning the dataset and iterating over it.
   To assign the dataset to your Repeater, use a SetValue action in your Load event.
   When the Repeater receives the dataset, each data item will be assigned to the mapped control, as per step 2.