WPF Visualization probleme

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Hi all,
I have a problem with combo box that i did give hem 2000 item the combo tack 2 sec to show his list for selection
this was the code XAML :

C#

<combobox height="23" horizontalalignment="Left" margin="72,27,0,0" name="cmbTest">
     VerticalAlignment="Top" Width="120" >        
</combobox>

to fix this time delay i did use VirtualizingStackPanel ,
the code after adding VirtualizingStackPanel is:

C#

<combobox height="23" horizontalalignment="Left" margin="72,27,0,0" name="cmbTest" scrollviewer.cancontentscroll="True">
                 VerticalAlignment="Top" Width="120" > 
            <combobox.itemspanel>
                <itemspaneltemplate>
                    <virtualizingstackpanel />
                </itemspaneltemplate>
            </combobox.itemspanel>
        </combobox>

as you see i did add :

C#

<combobox.itemspanel>
    <itemspaneltemplate>
        <virtualizingstackpanel />
    </itemspaneltemplate>
</combobox.itemspanel>

now the performance problem is solved with this code,

after this i want to change the scroll behavior so i did set ScrollViewer.CanContentScroll="false" in order to change scroll behavior.

after this modification i did lose the performance ,

any one have idea to solve this , the combo item visualization be performed and kip the scroll behavior

thx for help

Posted 17-Apr-12 4:36am

The-vister

Updated 17-Apr-12 4:41am

Nelek

v2

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Nelek 17-Apr-12 10:41am

Edit: Code tags added

3 solutions

Solution 1

So far i know, if you uncheck the CanContentScroll you will loose virtualization. For more details please have a look on that [^]

Posted 17-Apr-12 20:40pm

Md. Rashim Uddin

Solution 2

thanks for your help I know this , and i want an idea to work around it ,
i need the both CanContentScroll without loosing virtualization.

Posted 17-Apr-12 22:18pm

The-vister

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BillW33 18-Apr-12 12:07pm

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The-vister · Accepted Answer · 2012-04-18T03:09:00

CSS

i did find the solution for this problem i did use this link :

http://stackoverflow.com/questions/1977929/wpf-listbox-with-a-listbox-ui-virtualization-and-scrolling/9875475?s=3b2992e5-728d-4508-a9c3-8ddb895e265a[^]

at the post that explain how to use PixelBasedScrollingBehavior class

all you need to do is to add this class in your solution and used it in the your XAMEL code