IOleCache
The IOleCache
interface provides control of the presentation data that gets cached inside of
an object. Cached presentation data is available to the container of the object
even whenthe server application is not
running or is unavailable.
When to Implement
The IOleCache
interface can be implemented by an object handler and an in-process server. In
general, however, the methods of IOleCache are implemented as part of
the IOleCache2
interface, which inherits the IOleCache definition, and adds methods for
selectively updating the cache. Rather than implementing, however, it is
typical to use or aggregate the OLE implementation, a pointer to which is
available through a call to CreateDataCache.
When to Use
A client
calls the methods of IOleCache to control what the data cache holds. A
typical client would be an OLE Documents container that would cache an object s
presentation so it is available without the object actually being active.
Methods in VTable Order
|
IUnknown
Methods |
Description |
|
QueryInterface |
Returns
pointers to supported interfaces. |
|
AddRef |
Increments
the reference count. |
|
Release |
Decrements
the reference count. |
|
IOleCache
Methods |
Description |
|
Cache |
Adds a
presentation to the data or view cache. |
|
Uncache |
Removes a
presentation previously added with IOleCache::Cache. |
|
EnumCache |
Returns an
object to enumerate the current cache connections. |
|
InitCache |
Fills the
cache with all the presentation data from the data object. |
|
SetData |
Fills the
cache with specified format of presentation data. |