java - ContextMenu doesn't invoke delete in managedbean -

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i'm new in jsf , want use contextmenu of primeface delete method.but delete methode never invoked. here parts of code.i don't know mistake



  <p:datatable id="datatable" var="bon"  widgetvar="bontable" value="#{bonessencebean.allbonessence}" rowkey="#{bon.idbon}" selection="#{bonessencebean.bonessence}" selectionmode="single" sortmode="single" rows="10" paginator="true"  paginatortemplate="{currentpagereport}  {firstpagelink} {previouspagelink} {pagelinks} {nextpagelink} {lastpagelink} {rowsperpagedropdown}" rowsperpagetemplate="10,15,25">       <f:facet name="header">           <p:outputpanel>                  <h:outputtext value="search:" style="height:30px"/>                  <p:inputtext id="globalfilter" onkeyup="bontable.filter()" style="width:150px" />             </p:outputpanel>         </f:facet>           <!--  <p:ajax event="rowedit" listener="#{bonessence.updatebon}" />  -->   <!--  <p:ajax event="roweditcancel" listener="#{tablebean.oncancel}" update=":form:messages" />  -->          <p:column sortby="#{bon.idbon}" headertext="id bon" filterby="#{bon.idbon}" filtermatchmode="contains">              #{bon.idbon}          </p:column>            <p:column sortby="#{bon.vehicule.immat}" headertext="vehicule:" filterby="#{bon.vehicule.immat}" filtermatchmode="contains">               #{bon.vehicule.immat}          </p:column>            <p:column sortby="#{bon.quantite}" headertext="quantité:" filterby="#{bon.quantite}" filtermatchmode="contains">              #{bon.quantite}         </p:column>            <p:column sortby="#{bon.prix}" headertext="prix" filterby="#{bon.prix}" filtermatchmode="contains">               #{bon.prix}             </p:column>             <p:column sortby="#{bon.datebon}" headertext="date" filterby="#{bon.datebon}" filtermatchmode="contains">              #{bon.datebon}          </p:column>          <p:column>              <p:commandbutton value="imprimer"  icon="ui-icon-search" oncomplete="printdialog.show()" >            <f:setpropertyactionlistener target="#{bonessencebean.bonessence}" value="#{bon}"></f:setpropertyactionlistener>            </p:commandbutton>         </p:column>          <p:column>              <h:commandbutton  value="delete" update="datatable" icon="ui-icon-close" actionlistener="#{bonessencebean.deletebo}" >            <f:setpropertyactionlistener target="#{bonessencebean.bonessence}" value="#{bon}"></f:setpropertyactionlistener>            </h:commandbutton>         </p:column>                <!--  <h:column headertext="delete">            <h:commandlink id="delete"    actionlistener="#{bonessencebean.deletebon}">              <h:outputtext value="delete" />           <f:param id="deleteid"  name="id"  value="#{bonessence.idbon}" />           </h:commandlink>            </h:column>-->       </p:datatable>     </h:form>

managed

public void deletebon(actionevent event){     system.out.println("delete");     essenceservice.deletebon(bonessence); }

and deletebon never invoked

if dont gonna use actionevent, can try this:

<h:commandlink id="delete"    action="#{bonessencebean.deletebon()}">  public void deletebon(){ system.out.println("delete"); essenceservice.deletebon(bonessence); }

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