All dynamic types that have children have artificial fields added. The name of the added field is equal to the name of the child type. For example, in the hierarchy Country » City » Hotel, all instances of Country type have property Cities. This allows you to get all child cities of a particular country using the following code:
DataSource='<%# Eval("Cities") %>'>
If the country object is with status Live the returned cities are also Live, otherwise the property descriptor returns master objects.
You have the ability to retrieve the count of a specified child type using the following code:
<%# Eval("Cities.Count") %>
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