.net - Why does this code not bind SelectedItem to a property? -

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i'm pretty new xaml, , first task in new job untangle particularly malodorous collection of spaghetti code. learning xaml @ same time untangling horror-show proving beyond me, apologies homework-level questions i'm asking, these days.

anyway, have following xaml code:

<usercontrol.resources>     <collectionviewsource x:key="xmlobjectgroups" source="{binding path=xmlobjectlist}">                                       <collectionviewsource.groupdescriptions>             <propertygroupdescription propertyname="isdatetype"/>         </collectionviewsource.groupdescriptions>         <collectionviewsource.sortdescriptions>             <scm:sortdescription propertyname="isdatetype" direction="ascending"/>             <scm:sortdescription propertyname="ordernumber" direction="ascending"/>         </collectionviewsource.sortdescriptions>     </collectionviewsource> <usercontrol.resources> ...     <listview            datacontext="{staticresource xmlobjectgroups}"           itemcontainerstyle="{staticresource xmlitemstyle}"           itemssource="{binding}"           selecteditem="{binding path=selectedorder}">

on second line xmlobjectlist readonly property of viewmodel class, returning collections.objectmodel.readonlyobservablecollection(of myorder).

on final line selectedorder property of same viewmodel class, allows setting , getting of myorder object.

i have confirmed xmlobjectlist being correctly referenced renaming property, mistyping string, breakpoints, etc. xmlobjectlist references xmlobjectlist property of particular viewmodel class.

the selectedorder property, however, never accessed @ runtime, meaning isn't hooked selecteditem of listview.

as far reading around subject goes, , far answers got similar question yesterday, code have should working, isn't. doing wrong, here?

try changing following:

<listview         itemcontainerstyle="{staticresource xmlitemstyle}"        itemssource="{binding source={staticresource xmlobjectgroups}}"        selecteditem="{binding path=selectedorder}">

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