IPersistVariant Interface

Provides access to members used for storage of an object through VARIANTs.

Description

The IPersistVariant interface should be implemented by classes which need to be persistable. This interface was specifically designed for use by programmers who don�t use Visual C++, or C++ development environments.

The stream passed to the IPersistVariant interface is a specialist stream class which implements IVariantStream. Using this interface, any value type, or any COM object can be written to a stream. This stream class is internal to ArcObjects.

See the topics on implementing persistence for more details.

Members

Name Description
Read-only property ID The ID of the object.
Method Load Loads the object properties from the stream.
Method Save Saves the object properties to the stream.

IPersistVariant.ID Property

The ID of the object.

Public ReadOnly Property ID As UID
public UID ID {get;}

Description

Returns a UID or a the fully-qualified class name of your class.

IPersistVariant.Load Method

Loads the object properties from the stream.

Public Sub Load ( _
    ByVal Stream As IVariantStream _
)
public void Load (
    IVariantStream Stream
);

Description

The Load method must read the data from the stream in the same order the data was written to the stream in the Save method.

Streams are sequential; you must ensure that your data is saved and loaded in the correct order, so that the correct data is written to the correct member.

IPersistVariant.Save Method

Saves the object properties to the stream.

Public Sub Save ( _
    ByVal Stream As IVariantStream _
)
public void Save (
    IVariantStream Stream
);

Description

The Load method must read the data from the stream in the same order the data was written to the stream in the Save method.

Streams are sequential; you mut ensure that your data is saved and loaded in the correct order, so that the correct data is written to the correct member.

Classes that implement IPersistVariant

Classes Description

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