wpfdatagrid - I am using datagrid, whose itemsource is datatable. Can datatable primary key exceptions can be handled and displayed inside datagrid? -

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my grid's item source datatable has 1 field id (primary key). have bound field datagrid template column @ runtime when pass duplicate or null value id inside datagrid column, no exception caught , datagridtextbox doesn't show error. code given below;

 <usercontrol.resources>      <style x:key="errorstyle" targettype="{x:type textbox}">         <setter property="padding" value="-2"/>         <style.triggers>             <trigger property="validation.haserror" value="true">                 <setter property="background" value="red"/>                 <setter property="tooltip"                 value="{binding relativesource={relativesource self},                 path=(validation.errors)[0].errorcontent}"/>             </trigger>         </style.triggers>     </style>  </usercontrol.resources>   <datagrid autogeneratecolumns="false"  name="userdatagrid" verticalalignment="top"             width="381" itemssource="{binding datatableproperty, mode=twoway,             notifyontargetupdated=true, notifyonvalidationerror=true}"                issynchronizedwithcurrentitem="true" >          <datagrid.columns>             <datagridtextcolumn header="username" editingelementstyle=                                                       "{staticresource errorstyle}">                 <datagridtextcolumn.binding>                     <binding path="id" validatesonexceptions="true"  validatesondataerrors="true" notifyonvalidationerror="true" mode="twoway" updatesourcetrigger="propertychanged" >                         <binding.validationrules>                             <exceptionvalidationrule validationstep="updatedvalue"></exceptionvalidationrule>                         </binding.validationrules>                     </binding>                 </datagridtextcolumn.binding>             </datagridtextcolumn>         </datagrid.columns>      </datagrid>

can please me, doing wrong ?

you need validate manually. check wpf datagrid practical examples: validation bound datasets.


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