Thanks Chris but I've tried this already. The problem is
releasing the managed rich textbox from memory rather than
any unmanaged resources it may be using, which Dispose()
will take care of. Seeing as the rich textbox is a managed
resource I shouldn't really have to worry about freeing it
up beacuase the garbage collector should get rid of it once
there are no more references to it, but this doesn't seem
to be happening.
[color=blue]
>-----Original Message-----
>Hi John
>
>When you remove myTB from the panel, are you calling[/color]
Dispose? Since myTB inherits from RichTextBox, it should
also implement the IDisposable interface, and call its[color=blue]
>parent class' Dispose. This will free up resources[/color]
without waiting for the GC to call myTB's finalizer.[color=blue]
>
>Hope that helps
>-Chris
>
>--------------------[color=green]
>>Content-Class: urn:content-classes:message
>>From: "John Broderick" <john.broderick@snapon.ie>
>>Sender: "John Broderick" <john.broderick@snapon.ie>
>>Subject: RichTextBox memory problem
>>Date: Fri, 29 Aug 2003 09:11:48 -0700
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>>I've got a problem with the RichTextBox control in .Net
>>where the garbage collector doesn't reclaim its memory
>>after I've finished with it.
>>
>>My program adds a series of rtb's to the control array of a
>>panel to make a basic text editor. When the form that the
>>panel is on is closed these rtb's are still in memory.
>>
>>If you want to see the probelm try this:
>>create a form which has a panel on it. Create a class,
>>myTB, which derives from RichTextBox and has a static
>>integer field that keeps track of the number of instances
>>(increment in constructor and decrement in destructor, you
>>can display this value somewhere on the form and set a
>>timer to update it). The second form has three buttons,
>>one (Add) adds an instance of myTB to the panel, the
>>second (Remove) removes myTB from the panel and the third
>>(Collect) calls GC.Collect().
>>Now click Add a couple of time to create some myTB's and
>>click remove to remove them, then click Collect. The count
>>value should stay the same.
>>
>>If you want to see how it should work, try changing myTB to
>>derive from TextBox and try the same thing. The count will
>>be decremented when you force the garbage collect.
>>
>>Does anyone know anymore about this or know if there is a
>>way to explicitly delete an object in C#. It's killing my
>>app but I need the richtextbox for formatting
>>
>>thanks
>>
>>john b
>>
>>[/color]
>
>
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