Updating a scrolling panel.

[tomcoombs]

Hello All,

I have made, in effect my own ListView control. (As no ownerdraw mode of it in c#, do not get me started )

Anyway, all works very well until many "rows" are added. A "row" is a row usercontrol being added to a scrolling panel.

When many rows are in and you scroll to the bottem, it redraws ALL rows from the top. (If 1000 rows, it takes for ever!!!) How can I get it only to update the VIEWED area of the panel.

Or is there another solution..?


Thanks

Tom

 

[gorgor]

I'm having a hard time visualizing your problem. Are you saying that it is repainting the usercontrols when they aren't visible in the scrolling panel? Or is it just performing operations on the usercontrols that aren't visible (and thus eating up unnecessary CPU time)?

If my second question is the case, then I would think that you could check each usercontrol's "Visible" property and not perform any operations on it if the value is 'false'.

If this isn't what you're looking for, please clarify.