ListView Add() INCREDIBLY SLOW?

  • Thread starter Thread starter Steven Van Dyke
  • Start date Start date
S

Steven Van Dyke

I'm using a for loop to add about 5600 items to a list view. It's taking
about 5 minutes for the loop to complete. Is this normal? Would AddRange
work quicker? What's the quickest way to add items?

Thanks,

Steve
 
I tried a for loop to add my items to a ListView[] array, then used
AddRange(). Wow! Went from 5 minutes to like 3 seconds.

Steve
 
Gee, you think :D

Who would have thought that built in methods would be faster than home grown
loop hacks :D



Steven Van Dyke said:
I tried a for loop to add my items to a ListView[] array, then used
AddRange(). Wow! Went from 5 minutes to like 3 seconds.

Steve


Steven Van Dyke said:
I'm using a for loop to add about 5600 items to a list view. It's taking
about 5 minutes for the loop to complete. Is this normal? Would AddRange
work quicker? What's the quickest way to add items?

Thanks,

Steve
Click to expand...
Click to expand...
 
Always use the built in unless you have a good reason not to or can better
it :D


Mr.Tickle said:
Gee, you think :D

Who would have thought that built in methods would be faster than home grown
loop hacks :D



Steven Van Dyke said:
I tried a for loop to add my items to a ListView[] array, then used
AddRange(). Wow! Went from 5 minutes to like 3 seconds.

Steve


Steven Van Dyke said:
I'm using a for loop to add about 5600 items to a list view. It's taking
about 5 minutes for the loop to complete. Is this normal? Would AddRange
work quicker? What's the quickest way to add items?

Thanks,

Steve
Click to expand...
Click to expand...
Click to expand...
 
Steven Van Dyke said:
I'm using a for loop to add about 5600 items to a list view. It's taking
about 5 minutes for the loop to complete. Is this normal? Would AddRange
work quicker? What's the quickest way to add items?
Click to expand...

Have a look at the docs for the ListView's 'BeginUpdate' and 'EndUpdate'
methods. Notice that a lot of work has to be done when adding a new
item to the ListView control.
 
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