c# - Xaml - Bind listviewitem source object -

i use observablecollecion in vm. collection bind view in listview. in items try element create item. add in commandparameter , thing.

here's vm :

public relaycommand<selectioncommandparameter> cmdremovefromquiz { get; set; }  public observablecollection<question> selectedquiz {    { return _selectedquiz; }    set    {       _selectedquiz = value;       raisepropertychanged("selectedquiz");    } } private void removefromquiz(selectioncommandparameter selection) {     if (selection.parameter question)     {         observablecollection<question> tempquiz = selectedquiz;          question _question = (question)selection.parameter;         tempquiz.remove(_question);         selectedquiz = tempquiz;      } } 

the problem start removebtn start command, , selection stay null want observablecollection<question> object use in listviewitem

now view :

        <usercontrols:charmflyout         x:name="cfoquizlist"         x:uid="quizlistcreatingpageflyout"         heading="question multiple"         horizontalalignment="left"         grid.column="0"         grid.rowspan="2"         style="{staticresource stladdrecipientflyout}">             <tut:tutorialawarelistview x:name="gvquizitem"                           itemssource="{binding selectedquiz}"                           isitemclickenabled="true"                           canreorderitems="true"                           selectionmode="none"                           manipulationmode="translaterailsx">                 <listview.itemtemplate>                     <datatemplate x:name="dtquizitem">                         <grid horizontalalignment="left" width="{staticresource rectangletilewidth}" height="{staticresource rectangletileheight}"                                margin="0 0 0 0" background="{staticresource orangebackgroundthemebrush}">                             <grid grid.column="1">                                 <button x:name="removebtn" content="x" horizontalalignment="right" verticalalignment="top" width="40" height="40"                                          borderthickness="0" command="{binding datacontext.cmdremovefromquiz, elementname=gvquizitem}" commandparameter="{binding question}"/>                                 <maxctrls:maxautoscrollingcontentpresenter verticalalignment="center"                                         scrollingduration="{binding name, converter={staticresource texttotimetoreadshortformatconverter}}"                                         scrollingbegintime="0:0:2">                                     <textblock text="{binding name}" fontweight="semibold"                                                 foreground="{staticresource whitebackground}"                                                margin="20,5,10,5" verticalalignment="center" textwrapping="wrap"/>                                 </maxctrls:maxautoscrollingcontentpresenter>                             </grid>                         </grid>                     </datatemplate>                 </listview.itemtemplate>             </tut:tutorialawarelistview>         </usercontrols:charmflyout> 

the tutorialawarelistview work listview. use juste point element while tutorial running.

it's windows store app !! can't thing to.

you should change selectionmode="none" single or multiply. , make new observablecollection selected items. bind itemssource="{binding selectedquiz}". bind selecteditems="{...}"