wpf - How to get rid of display corruption during horizontal scroll in WPF4 DataGrid with grouping? -

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i'm trying create datagrid grouping , i'm getting display corruption (blank areas) during horizontal scrolling. issue appears only when there groupstyle.containerstyle defined. datagrid should contain 200 rows or more reproduce problem.

update2: related microsoft connect feedback.

update: microsoft guy @ social.msdn.com pointed out adding grouping turns off datagrid virtualization. possibly that's root of problem. removed grouping sample , set virtualizingstackpanel.isvirtualizing false , got same kind of corruption.

code reproduce problem:

<datagrid itemssource="{binding source={staticresource resourcekey=cvsgoods}}"           canuseraddrows="false" canuserreordercolumns="false"           canuserdeleterows="false" canuserresizerows="false"           canusersortcolumns="false" autogeneratecolumns="true">     <datagrid.groupstyle>         <groupstyle>             <groupstyle.containerstyle>                 <style targettype="{x:type groupitem}">                     <setter property="template">                         <setter.value>                             <controltemplate targettype="{x:type groupitem}">                                 <itemspresenter  />                             </controltemplate>                         </setter.value>                     </setter>                 </style>             </groupstyle.containerstyle>         </groupstyle>     </datagrid.groupstyle> </datagrid>

after several horizontal scrolls right , left blank areas appear on left side. tried on winxp , win7.

the question is: how rid of bug? there workaround? suggestions?

screenshot illustrating problem:

display corruption

we once faced same issue (but not same cause) i.e. datagrid have blank areas before first column of of rows. way solved (a hack) @ time disabling rowheader (don't know how solved problem did figure out blank areas rowheaders).

we disabled (correct word made size-zero) rowheader setting width zero, code below:

<wpftk:datagrid> ... ... <wpftk:datagrid.rowheaderstyle>     <style  targettype="wpftk:datagridrowheader" >         <setter property="width" value="0" />         <setter property="maxwidth" value="0" />     </style> </wpftk:datagrid.rowheaderstyle> ... ... </wpftk:datagrid>

let me know if works in case.

one more thing noticed if either disable virtualization or rowheaderstyle, solve our problem. went disabling rowheader didn't need it.


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