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CachedFile Object |
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See Also: |
Opens a file and holds its file handle, or holds its contents in memory.
VBScript:
JScript:
| cachedFile | A CachedFile object. |
| sPath | The string path of the file to be cached.
If bMapPath is True, this path is resolved using Server.MapPath(). If bMapPath is False, this should be a complete path. |
| bMapPath | Optional Boolean parameter - the default is
True. If True, Server.MapPath() is called on sPath to resolve the path. |
| bMonitorFileChanges | Optional Boolean parameter - the default is True. If True, the cached contents
are updated whenever the file on disk changes. If False, a snapshot of the
file is cached. Monitoring for file changes is quite efficient in Windows 2000, but has a performance penalty under Windows NT 4. For more information see ASPCache.WriteFile().
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ASPCache.WriteFile() calls CachedFile.Open() when
creating a new CachedFile object, which is
why the parameters are similar.
If the file described by sPath cannot be found, an error is raised.
Open() is not a thread-safe method, so it should not be called on
a CachedFile object that is stored in an ASPCache. If you need to
re-open a CachedFile object, remove it from the cache before re-opening it:
' Re-open a CachedFile object stored in the
Cache
Dim sPath, cf
If Cache.Exists(sPath)
Then
' Retrieve a CachedFile object from the
Cache
Set cf =
Cache(sPath)
' Remove it from the
Cache
Cache.Remove
sPath
' Re-open the CachedFile
object
cf.Open sPath
' Insert the CachedFile back in the Cache
Cache(sPath) = cf
End If