Can a Stream notify other objects when it has been changed?

  • Thread starter Thread starter Peter Rilling
  • Start date Start date
P

Peter Rilling

Is there anyway of being notified when a Stream is modified? Basically, If
one of my objects is passed a stream, I would like to initialize an object
cache. Then when the Stream changes, I would like to update the cache.
Does not look like the stream has any event that I can hook.
 
Peter,

No, there is no way to do this, and if there was, then I would be
worried. Not all streams support seeking on the stream, so for something
like a network connection, this would be a problem.

What you want to really do, IMO, is to find out if the store that the
stream represents (db, network, file, etc, etc) has changed, and if it has,
get a new stream.

Hope this helps.
 
How can I determing if the stream has changed? Is some other object changes
a byte in the middle of the stream, how can I be notified of this?

Nicholas Paldino said:
Peter,

No, there is no way to do this, and if there was, then I would be
worried. Not all streams support seeking on the stream, so for something
like a network connection, this would be a problem.

What you want to really do, IMO, is to find out if the store that the
stream represents (db, network, file, etc, etc) has changed, and if it has,
get a new stream.

Hope this helps.


--
- Nicholas Paldino [.NET/C# MVP]
- (e-mail address removed)

Peter Rilling said:
Is there anyway of being notified when a Stream is modified? Basically, If
one of my objects is passed a stream, I would like to initialize an object
cache. Then when the Stream changes, I would like to update the cache.
Does not look like the stream has any event that I can hook.
Click to expand...
Click to expand...
 
Peter Rilling said:
How can I determing if the stream has changed? Is some other object changes
a byte in the middle of the stream, how can I be notified of this?
Click to expand...

You could wrap the existing stream in your own stream, which forwards
on all methods to the other stream, but raises an event every time a
write occurs.
 
Back
Top