ListManagerRemoveItem?

JoakimMD · Post by **JoakimMD** » Thu Jun 30, 2016 7:17 am

Hi all,

Have a problem with "ListManagerRemoveItem". When I run this event it will not remove all rows. Row 0-2 still remains in the list. If i run the event again it will remove row 1-2. And if I run it one more time row 0 will be removed.

Why?

Code: Select all

int rows = ListManagerGetCount(ListDataType.DataList);
	
	for (int index = 0; index < rows; index++)
	{
		ListManagerRemoveItem(ListDataType.DataList, index);
	}

Thanks!

stalley · Post by **stalley** » Thu Jun 30, 2016 7:36 am

Hello JoakimMD,

What version of PowerVision Configuration Studio are you using?

The processes on the displays are asynchronous. Is it possible rows are being added just after the remove function is run?

This could very well be a bug. If you give me more details, I can try to recreate the problem. If I build up a static list of five items, then run your function, should I see the problem?

Thanks!

stalley · Post by **stalley** » Thu Jun 30, 2016 9:04 am

Hello JoakimMD,

Well I am so embarrassed! What is the fundamental programming rule of deleting from an array? Start at the end or highest index ... cause if you start at 0, the elements will move up and the indexes change.

The loop needs to be

for (int index = rows; index >= 0; index--)

Hope this will work for you!

JoakimMD · Post by **JoakimMD** » Thu Jun 30, 2016 9:49 am

Ha ha... I´m embarrassed too... :)

I figured that out and has now changed the code but in a slightly different way.

Code: Select all

for (int rows = ListManagerGetCount(ListDataType.DataList); rows >= 0; rows--)
	{
		ListManagerRemoveItem(ListDataType.DataList, rows);
	}

Thanks!

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Re: ListManagerRemoveItem?