This example demonstrates how to implement cascaded lookups. The main idea is to get the changed value of the first lookup and select data based on this value for the second lookup. It is necessary to perform the following steps:
1. Handle the dxLokup.valueChangeAction event of the first lookup;
2. In this event handler pass the selected value of the first lookup to the DataSource.filter method of a data source that is related to the second lookup.
See also:
OData Associations
ODataContext
dxLookup
ODataContext - How to filter data by a foreign key value
