OnInsert()

OnInsert(index, value)

OnInsert(index, ByRef value)

Performs additional custom processes before inserting a new element into the MfCollectionBase instance.

Parameters

index

The zero-based index at which to insert value.

value

The new value of the element at index.

Remarks

Protected Method
The default implementation of this method is intended to be overridden by a derived class to perform some action before the specified element is inserted.

If the process fails, the collection reverts back to its previous state.

The default implementation of this method is an O(1) operation.

Notes to Implementers

This method allows implementers to define processes that must be performed before inserting the element into the underlying MfList. By defining this method, implementers can add functionality to inherited methods without having to override all other methods.

OnInsert() is invoked before the standard Insert behavior, whereas OnInsertComplete() is invoked after the standard Insert behavior.

For example, implementers can restrict which types of objects can be inserted into the System.Collections.ArrayList.

OnValidate() is called prior to this method.