Developing a Custom ForEach Enumerator

Integration Services uses foreach enumerators to iterate over the items in a collection and perform the same tasks for each element. Integration Services includes a variety of foreach enumerators that support the most commonly used collections, such as all the files in a folder, all the tables in a database, or all the elements of a list stored in a package variable. If the foreach enumerators and collections that are provided do not entirely meet your requirements, you can create a custom foreach enumerator.

To create a custom foreach enumerator, you have to create a class that inherits from the ForEachEnumerator base class, apply the DtsForEachEnumeratorAttribute attribute to your new class, and override the important methods and properties of the base class, including the GetEnumerator method.

For a working sample of a custom foreach enumerator, see the Integration Services samples on Codeplex.