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Questions tagged [virtualizingstackpanel]

Arranges and virtualizes content on a single line that is oriented either horizontally or vertically.

The standard layout system creates item containers and computes layout for each item associated with a list control. The word "virtualize" refers to a technique by which a subset of user interface (UI) elements are generated from a larger number of data items based on which items are visible on-screen. Generating many UI elements when only a few elements might be on the screen can adversely affect the performance of your application. The VirtualizingStackPanel calculates the number of visible items and works with the ItemContainerGenerator from an ItemsControl (such as ListBox or ListView) to create UI elements only for visible items.

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VirtualizingStackPanel is fast only when fresh. How can I fix it?

When I create ListBox with virtualization enabled and then update all its items appearance it works very fast. But when i slowly scroll down all items in ListBox and then update all items appearance it takes a lot of time. I think it because…
user990095
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Couldn't get selected items correctly if setting ListView ItemsContainer as VirtualizationStackPanel

I set 'VirtualizingStackPanel.IsVirtualizing' to true and 'VirtualizingStackPanel.VirtualizationMode' to 'Recycling', because the items in my ListView are too many. The SelectionMode of the ListView is Extended, the 'IsSelected' property of the…
Allen4Tech
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What is the use of Type.InvokeMember

Iam working in a WPF Application and in one place I had to use this piece of code to get the reference to a VirtualizingStackPanel. Following is the piece of code, VirtualizingStackPanel vsp = (VirtualizingStackPanel)obj.InvokeMember("_itemsHost",…
surajitk
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wpf how to call measure on all visible containers in virtualizing stackpanel of scrollviewer

Goal: To Remeasure and then redraw only those signalgraphs that are in view in the virtualizing stack panel of a scrollviewer. Current build: Currently I have a dependency property (UnitsOfTimePerAxisDivision) that affects measure whenever the…
James Joshua Street
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Alternative of VirtualizingStackPanel.CacheSize in .Net 4.0

What are the factors that virtualizingstackpanel consider when it decides visualizing items around the visible item? Ex: Having a listview, when viewing item 7, item 6& 8 will be visualized too although they are not seen. How can limit visualized…
simo
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Height of ListBoxItem in VirtualizingStackPanel

I'm developing an app where the entire UI is sized by percentage. Therefore the height of my ListBoxItems needs to be controlled by that too. But i'm having some problems getting it to work. ListBoxStyle: