Provides access to members that initialize and shutdown the class extension.
Description
Required interface for class extensions. Class extensions should implement behavior that pertains to a specific object or feature class in a geodatabase.
When To Use
IClassExtension should be implemented by all object class and feature class extensions.
Members
| Name | Description | |
|---|---|---|
 |
Init | Initializes the extension, passing in a reference to its class helper. |
|
Shutdown | Informs the extension that its class helper is going away. |
IClassExtension.Init Method
Initializes the extension, passing in a reference to its class helper.
Public Sub Init ( _
    ByVal ClassHelper As IClassHelper, _
    ByVal ExtensionProperties As IPropertySet _
)
public void Init (
    IClassHelper ClassHelper,
    IPropertySet ExtensionProperties
);
Remarks
If a reference to the class is required by other class extension members, the class helper should be stored in a member variable. Storing an object or feature class directly within a class extension is strongly discouraged.
IClassExtension.Shutdown Method
Informs the extension that its class helper is going away.
Public Sub Shutdown ( _
)
public void Shutdown (
);
Remarks
Shutdown is called when the extension's class is cleared from the client's memory, or when the extension is removed from the class. Note that if a class is deleted from a geodatabase, it may remain in memory, so this should not be relied upon for behavior that should be triggered by a class' deletion.
Classes that implement IClassExtension
| Classes | Description |
|---|---|
| MEAnnotationFeatureClassExtension (esriCartoX) | A class extension which contains all the properties for an annotation feature class. |
| MEDimensionClassExtension (esriCartoX) | A class extension which contains all the style properties for a dimension feature class. |