How to make scrollviewer scroll pixels not components (wpf)

Question

I'm trying to make my scroll viewer scroll flawlessly, that is I have a scrollviewer and it contains a stackpanel , the stack panel contains a user-made user control. and they can increase or decrease dynamically at run time.

the problem is, suppose i have only 2 user controls in my stack panel , the scroll viewer have only 2 levels of scrolling, so it scrolls a whole user control for each click or mouse-wheel movement.

how can I change that? is it a property or there is a mistake in the design?

here is the xaml code for it:

<ScrollViewer HorizontalAlignment="Left" Height="420" VerticalAlignment="Top" Width="862" Margin="0,0,-2,0" CanContentScroll="True" PanningRatio="0.1">
                <StackPanel x:Name="hpList" HorizontalAlignment="Left" Height="422" VerticalAlignment="Top" Width="843"/>
            </ScrollViewer>

and the stack panel expands or shrinks dynamically.

in addiotion to @devhedgehog now Try setting StackPanel with IsItemsHost="False" — eran otzap
– eran otzap, Commented Oct 31, 2013 at 9:09

ZSH · Accepted Answer · 2013-10-31 09:16:16Z

7

set CanContentScroll="False" and remove the stackpanel height\width

answered Oct 31, 2013 at 9:16

ZSH

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2 Comments

Hassan Khallouf Over a year ago

that did the trick! thanks , but can u explain what does the height\width has to do with it?

ZSH Over a year ago

the stackpanel size go to the scroll content size so it seems to scrollviewer that he need no scroll, (if i'm unclear google is full of answers :) )

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