xaml - UserControl style only visible in designer -


i'd have page headers in app either icon or text centered in 50px high bar @ top of page. optionally back-button.

for reason use usercontrol on each page gets either 1 of styles applied: pageheaderstyle or pageheaderbackstyle.

my implementation of 1 of following (style definition in app.xaml):

   <style x:key="pageheaderbasestyle" targettype="usercontrol">         <setter property="horizontalalignment" value="stretch" />         <setter property="verticalalignment" value="top" />         <setter property="height" value="50" />         <setter property="width" value="nan" />         <setter property="background" value="{staticresource cdcolor}" />     </style>      <style x:key="pageheaderstyle" targettype="usercontrol" basedon="{staticresource pageheaderbasestyle}">         <setter property="content">             <setter.value>                 <grid background="{staticresource cdcolor}" horizontalalignment="stretch" verticalalignment="stretch" datacontext="{staticresource mainpagemodel}">                     <textblock style="{staticresource pageheadertextblockstyle}" text="{binding title}" visibility="{binding titlevisibility}" />                     <image style="{staticresource pageheadericonstyle}" source="{binding icon}" visibility="{binding iconvisibility}" />                 </grid>             </setter.value>         </setter>     </style>

applied should be:

<usercontrol style="{staticresource pageheaderstyle}" />

now first had used "template" , applied datatemplate grid component. didn't work. changed directly set content of usercontrol. work: after building designer shows page header (before showed blue selection border, no content - transparent).

but start debugging app on emulator disappears , running app shows blank spot should be.

why so? mean after designer shows it, why disappear then, though?

fyi: not binding exceptions nor other. doesn't show up.

ps: tried setting background in base style while setting grid's background transparent. didn't work either - blank spot.

solved problem: best approach use contentcontrol. using content property did not work, though. have use contenttemplate property. using 1 work fine.


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