CODEWITHSUNDEEP
delphigenerics
user2996299
user2996299

Reputation: 133

How can I detect when increasing the size TDictionary

I use TDictionary to handle large volumes of data. How can I detect the moment when the size increases TDictionary?

Upvotes: 2

Views: 619

Answers (2)

Delphine
Delphine

Reputation: 49

In recent versions of Delphi there is the Capacity property:

property Capacity: Integer read GetCapacity write SetCapacity;

But you still don't get to know when the object grows capacity on its own.

You can though set the Capacity large enough to cover your needs, Then use the TrimExcess method to set the capacity to actual number of entries.

Upvotes: 0

David Heffernan
David Heffernan

Reputation: 612993

If you wish to detect when the underlying private storage is grown, then you cannot. That is handled by the private methods SetCapacity and Grow, and the class provides no external hook.

You can detect key and value modifications using the OnKeyNotify and OnValueNotify events. The OnKeyNotify event fires with notification parameter of cnAdded when a new key is added.

Upvotes: 2

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