c# - Going more than one time through my AutoCompletBox Selection_Changed event -


i have autocompletebox, write name.

the probme is, i'm going through two(or more) times when choose 1 element in dropdownlist.

i don't understand why, going through populating event 1 time, why more in selection changed event more one?

<mycontrol:autocompletebox  x:name="acpname"                             verticalalignment="top"                             horizontalalignment="left"                             istabstop="false"                              istextcompletionenabled="true"                             minimumprefixlength="3"                             valuememberbinding="{binding name}"                             itemtemplate="{staticresource itemtemplatematriculecandidat}"                             itemssource="{binding data, elementname=namesource}"                             text="{binding name, mode=twoway, notifyonvalidationerror=true, validatesonexceptions=true}"                              minwidth="150"                             filtermode="none" />      void acpname_selectionchanged(object sender, selectionchangedeventargs e)         {     try     {         emp itm = (emp)acpname.selecteditem;          if (itm  != null)         {             itmempselect.surname= itm.surname;             itmempselect.id= itm.id;             itmempselect.birth= itm.birth;         }     }     catch (exception ex)     {         errorwindow.createnew(ex);     } }

this happens if nothing in selection changed event. don't understand. seems hapenning when have multiple choice after populating event. why?

thank you.


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