user controls - Silverlight WrapPanel not displaying items consistently -
we use wrappanel display varying number of buttons (actually usercontrols behave buttons). inside each wrappanel itemscontrol items. oftentimes wrappanel doesn’t display items—if there 4 see 1 or two. behavior not consistent.
is there we’re doing wrong? there known issues using wrappanel this?
for xaml, usercontrol in our main window:
<usercontrol x:name="uccatalogcontent" grid.row="2"> <local:catalog_categoryview /> this categoryview markup. has itemscontrol. items other usercontrols wrappanel inside them:
<usercontrol xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:sdk="http://schemas.microsoft.com/winfx/2006/xaml/presentation/sdk" xmlns:toolkit="http://schemas.microsoft.com/winfx/2006/xaml/presentation/toolkit" xmlns:local="clr-namespace:catalog;assembly=catalog" x:class="catalog.catalog_categoryview" > <usercontrol.resources> <datatemplate x:key="categorydt" > <local:category /> </datatemplate> </usercontrol.resources> <scrollviewer x:name="scvcatalogcategoryview" horizontalscrollbarvisibility="disabled"> <!-- item should bound collection of categories --> <itemscontrol x:name="iccategories" itemtemplate="{staticresource categorydt}" > <local:category x:name="item1" /> <local:category x:name="item2" /> <local:category x:name="item3" /> </itemscontrol> </scrollviewer> and individual category, wrappanel used:
<usercontrol xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:sdk="http://schemas.microsoft.com/winfx/2006/xaml/presentation/sdk" xmlns:toolkit="http://schemas.microsoft.com/winfx/2006/xaml/presentation/toolkit" xmlns:custom="clr-namespace:customcontrolresources;assembly=customcontrolresources" xmlns:local="clr-namespace:catalog;assembly=catalog" x:class="catalog.category" > <usercontrol.resources> <itemspaneltemplate x:key="categoryitempanel"> <toolkit:wrappanel verticalalignment="top" horizontalalignment="stretch" /> </itemspaneltemplate> <datatemplate x:key="offeringdt" > <local:offeringtile x:name="offeringtile" /> </datatemplate> </usercontrol.resources> <grid x:name="layoutroot" style="{staticresource contentrootstyle}"> <grid.rowdefinitions> <rowdefinition height="auto" /> <rowdefinition height="*" /> </grid.rowdefinitions> <custom:blockexpander x:name="expcategoryexpander" title="access [bind me]"> <custom:blockexpander.blockexpandercontent> <itemscontrol x:name="icserviceofferingslist" itemspanel="{staticresource categoryitempanel}" itemtemplate="{staticresource offeringdt}" > <local:offeringtile /> <local:offeringtile /> <local:offeringtile /> <local:offeringtile /> </itemscontrol> </custom:blockexpander.blockexpandercontent> </custom:blockexpander> </grid> in screenshot, there should title on each expander header (by blue triangle), , each group should contain 4 items: 
it turns out there interaction between expander usercontrol , wrappanel. removed codebehind, wrappanel behaved normally.
we worked around styling toolkit's expander. weren't using toolkit, since needed wrappanel....
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