Issue in vertical scrollbar in silverlight datagrid -


i'm using silverlight datatgrid in project checkbox in header selectall option.

while scrolling datagrid vertically, header checkbox status changing randomly content checkbox status remains correct.

please me if come across issue.

<control:datagrid.rowgroupheaderstyles>    <style targettype="control:datagridrowgroupheader">          <setter property="propertynamevisibility" value="collapsed" />          <setter property="background" value="lightgray" />          <setter property="foreground" value="#ff404040" />          <setter property="sublevelindent" value="15" />          <setter property="template">               <setter.value>                 <controltemplate targettype="control:datagridrowgroupheader">                   <primitives:datagridfrozengrid name="root" background="{templatebinding background}">                      <visualstatemanager.visualstategroups>                         <visualstategroup x:name="currentstates">                            <visualstate x:name="regular"/>                               <visualstate x:name="current">                                <storyboard>                                <doubleanimation storyboard.targetname="focusvisual" storyboard.targetproperty="opacity" to="1" duration="0" />                                 </storyboard>                              </visualstate>                          </visualstategroup>                         </visualstatemanager.visualstategroups>                         <primitives:datagridfrozengrid.resources>                           <controltemplate x:key="togglebuttontemplate" targettype="togglebutton">                           <grid background="transparent">                                <visualstatemanager.visualstategroups>                                   <visualstategroup x:name="commonstates">                                      <visualstate x:name="normal"/>                                        <visualstate x:name="mouseover">                                         <storyboard>                                           <coloranimation storyboard.targetname="collapsedarrow" storyboard.targetproperty="(stroke).color" duration="0" to="#ff6dbdd1"/>                                             <coloranimation storyboard.targetname="expandedarrow" storyboard.targetproperty="(fill).color" duration="0" to="#ff6dbdd1"/>                                         </storyboard>                                       </visualstate>                                      <visualstate x:name="pressed">                                        <storyboard>                                          <coloranimation storyboard.targetname="collapsedarrow" storyboard.targetproperty="(stroke).color" duration="0" to="#ff6dbdd1"/> 

                                                <path stretch="uniform" data="f1 m 0,0 l 0,1 l .6,.5 l 0,0 z" width="5" horizontalalignment="center" verticalalignment="center" x:name="collapsedarrow" visibility="collapsed" stroke="#ff414345"/>                                                 <path stretch="uniform" data="f1 m 0,1 l 1,1 l 1,0 l 0,1 z" width="6" horizontalalignment="center" verticalalignment="center" x:name="expandedarrow" fill="#ff414345"/>                                             </grid>                                         </controltemplate>                                     </primitives:datagridfrozengrid.resources>                                      <grid.columndefinitions>                                         <columndefinition width="auto" />                                         <columndefinition width="auto" />                                         <columndefinition width="auto" />                                         <columndefinition width="auto" />                                         <columndefinition/>                                     </grid.columndefinitions>                                     <grid.rowdefinitions>                                         <rowdefinition height="auto"/>                                         <rowdefinition/>                                         <rowdefinition height="auto"/>                                     </grid.rowdefinitions>                                      <rectangle grid.column="1" grid.columnspan="5" fill="#fffdd234" height="1"/>                                     <rectangle grid.column="1" grid.row="1" name="indentspacer" />                                     <togglebutton grid.column="2" grid.row="1" name="expanderbutton" height="15" width="15" istabstop="false" template="{staticresource togglebuttontemplate}" margin="2,0,0,0"/>                                      <stackpanel grid.column="3" grid.row="1" orientation="horizontal" verticalalignment="center" margin="0,1,0,1">                                         <checkbox tag="{binding}" name="headercheck" click="headercheck_click"  horizontalalignment="left"   />                                     </stackpanel>                                      <rectangle grid.column="1" grid.columnspan="5" fill="#ff4f54da" height="1" grid.row="2"/>                                     <rectangle name="focusvisual" grid.column="1" grid.columnspan="4" grid.rowspan="3" stroke="#ff6db112" strokethickness="1" horizontalalignment="stretch"                             verticalalignment="stretch" ishittestvisible="false" opacity="0" />                                     <primitives:datagridrowheader name="rowheader" grid.rowspan="3" primitives:datagridfrozengrid.isfrozen="true" />                                  </primitives:datagridfrozengrid>                             </controltemplate>                         </setter.value>                     </setter>                 </style>             </control:datagrid.rowgroupheaderstyles>

you have header checkbox bound current item , scroll changes. not bind checkbox unless using setter change of values in itemssource collection. in case make sure nothing else changing value of property bound to.


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