|
IOleCache2::UpdateCache
Updates specified cache(s). It updates the cache according to the value of a
parameter. This method is used when the application needs precise control over
caching.
HRESULT UpdateCache(
IDataObject * pDataObject,
| //Points to the data object from which the cache is updated
| DWORD grfUpdt,
| //Specifies the type of cache to update
| LPVOID pReserved
| //Reserved, must be NULL
| );
|
|
Parameters
pDataObject
[in]Points to the data object from which the cache is updated. Object handlers
and in process servers typically pass a non-NULL value. A container
application usually passes NULL, and the source is obtained from the currently running
object.
grfUpdt
Specifies the type of cache to update. The value is obtained by combining
values from the following table:
Cache Control Values
| Description
| UPDFCACHE_NODATACACHE
| Updates caches created by using ADVF_NODATA in the call to IOleCache::Cache.
| UPDFCACHE_ONSAVECACHE
| Updates caches created by using ADVFCACHE_ONSAVE in the call to IOleCache::Cache.
| UPDFCACHE_ONSTOPCACHE
| Updates caches created by using ADVFCACHE_ONSTOP in the call to IOleCache::Cache.
| UPDFCACHE_NORMALCACHE
| Dynamically updates the caches (as is normally done when the object sends out
OnDataChange notices).
| UPDFCACHE_IFBLANK
| Updates the cache if blank, regardless of any other flag specified.
| UPDFCACHE_ONLYIFBLANK
| Updates only caches that are blank.
| UPDFCACHE_
IFBLANKORONSAVECACHE
| The equivalent of using an OR operation to combine UPDFCACHE_IFBLANK and
UPDFCACHE_ONSAVECACHE.
| UPDFCACHE_ALL
| Updates all caches.
| UPDFCACHE_
ALLBUTNODATACACHE
| Updates all caches except those created with ADVF_NODATA in the call to IOleCache::Cache.
Thus, you can control updates to the caches created with the ADVF_NODATA flag
and only update these caches explicitly.
|
pReserved
Reserved for future use; must be NULL.
Return Values
S_OK
The cache(s) were updated according to the value specified in grfUpdt.
E_OUTOFMEMORY
The cache(s) were not updated due to a lack of memory.
E_INVALIDARG
One or more arguments are invalid.
E_UNEXPECTED
An unexpected error occurred.
OLE_E_NOTRUNNING
The specified pDataObject is not running.
CACHE_E_NOCACHE_UPDATED
None of the caches were updated.
CACHE_S_SOMECACHES_NOTUPDATED
Some of the caches were updated.
See Also
IOleCache, IOleCacheControl
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