Updating Textbox Text

[Guest]

Yes, that does give me some more ideas. I think I was just going about this all wrong before. Thank you very much for your help - I appreciate it

-Tim

 

[Derek Harmon]

...Or, maybe he should write the string handling in an efficient way and see
if it works without GC.Collect? IMHO (and in the humble opinion of a great
many developers including those at MS), calling GC.Collect should be a last
resort and not a normal part of the programming process.

I think we agree on GC.Collect's place in production applications, my point
only being it's useful to diagnose whether the garbage collector is actually
the problem.

As for StringBuilder: it will make the string operations slightly more efficient
up until it gets assigned to Textbox1.Text, at which point it becomes a string
(a very long one, by the sound of it...)

The cumulative result of doing that assignment 22,000 times, or even
23,000 times, is.. a lot of orphaned string references coming from Textbox
itself to be cleaned up - even with StringBuilder.


Derek Harmon

 

[Scott M.]

As for StringBuilder: it will make the string operations slightly more
efficient

up until it gets assigned to Textbox1.Text, at which point it becomes a string
(a very long one, by the sound of it...)

The cumulative result of doing that assignment 22,000 times, or even
23,000 times, is.. a lot of orphaned string references coming from Textbox
itself to be cleaned up - even with StringBuilder.

Aren't you assuming that the text property of a textbox is immutable like
the string that you pass to it? I'm not sure that it is. I think that the
text property is mutable in the same way that the StringBuilder is. The
string builder takes in a string value as an argument and then holds that
value in a mutable way. My understanding of the textbox's text property is
that it does the same?

So, if I were to change the text property of a textbox 10 times, I
*wouldn't* necessarily have created 10 different strings on the heap, 9 of
which would wind up being orphaned.