c# - Bringing a Border into View -

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i have tabitem:

<tabitem x:name="tabtfgwreadingmainhall" header="main hall" datacontext="{binding meeting}">     <tabitem.style>         <style targettype="{x:type tabitem}">             <setter property="isenabled" value="false"/>             <setter property="isselected" value="false"/>             <style.triggers>                 <datatrigger binding="{binding numberclasses, converterparameter=1, converter={staticresource isequalorgreaterthanconverter}}" value="true">                     <setter property="isenabled" value="true" />                 </datatrigger>                 <datatrigger binding="{binding selecteditem, elementname=comboactivestudentassignmenttype}" value="{x:static studentinfoenums:studentassignmenttype.biblereadingmain}">                     <setter property="isselected" value="true"/>                 </datatrigger>             </style.triggers>         </style>     </tabitem.style>     <border  x:name="borderbiblereadingmain" borderthickness="5">         <border.style>             <style targettype="border">                 <setter property="borderbrush" value="transparent"/>                 <style.triggers>                     <datatrigger binding="{binding selecteditem, elementname=comboactivestudentassignmenttype}" value="{x:static studentinfoenums:studentassignmenttype.biblereadingmain}">                         <setter property="borderbrush" value="red"/>                     </datatrigger>                 </style.triggers>             </style>         </border.style>         <stackpanel>             <stackpanel.style>                 <style targettype="{x:type stackpanel}">                     <setter property="isenabled" value="false"/>                     <style.triggers>                         <datatrigger binding="{binding numberclasses, converterparameter=1, converter={staticresource isequalorgreaterthanconverter}}" value="true">                             <setter property="isenabled" value="true" />                         </datatrigger>                     </style.triggers>                 </style>             </stackpanel.style>             <label content="student:"/>             <grid>                 <grid.columndefinitions>                     <columndefinition width="*"/>                     <columndefinition width="auto"/>                 </grid.columndefinitions>                 <textbox x:name="textbiblereadingmain" grid.column="0" margin="2" isenabled="false"                         datacontext="{binding tfgw.biblereadingitem.main}"                         text="{binding datacontext.biblereadingmain, elementname=oclmeditor, mode=twoway, notifyonsourceupdated=true, updatesourcetrigger=propertychanged}"/>                 <button x:name="buttonbiblereadingmain" grid.column="1" background="transparent"                         datacontext="{binding datacontext, elementname=oclmeditor}"                             command="{binding applicationcommand}" commandparameter="biblereadingmain">                     <image source="images/assignmenttypebiblereading16.png" margin="2"/>                 </button>             </grid>             <label content="study:"/>             <combobox datacontext="{binding datacontext, elementname=oclmeditor}"                           itemssource="{binding readingstudypointslist}">                 <combobox.itemtemplate>                     <datatemplate>                         <stackpanel orientation="horizontal">                             <textblock text="{binding number}"/>                             <textblock text=" - "/>                             <textblock text="{binding title}"/>                         </stackpanel>                     </datatemplate>                 </combobox.itemtemplate>             </combobox>         </stackpanel>     </border> </tabitem>

as can see, has datatriggers implemented. thus, when change comboactivestudentassignmenttype (over on right edge of editor):

select bible reading main combo

this how controls on left change:

before:

before

after:

after

the datatriggers working right. border set correctly , tabitem gets selected. but, if possible, end this:

scroll view

i have done research on , appears need use bringintoview desired results. needs called code behind. added selectionchanged handler , did this:

private void comboactivestudentassignmenttype_selectionchanged(object sender, selectionchangedeventargs e) {     oclmeditorviewmodel vm = this.datacontext oclmeditorviewmodel;     if(borderbiblereadingmain != null &&         vm.activestudentassignmenttype == data.studentinfo.enums.studentassignmenttype.biblereadingmain)         borderbiblereadingmain.bringintoview();     // todo: add others here }

whilst did fired, did not seem make difference. still had scroll reactangle bring view.

how should doing this?

thank you.


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