c# - Invoke command OnSelectionChanged in GridViewComboBoxColumn WPF -

is there way can invoke command , pass selecteditem parameter viewmodel when selection change occurs?

xaml:

<telerik:gridviewcomboboxcolumn itemssource="{binding statuslist, mode=twoway, updatesourcetrigger=propertychanged}" selectedvaluememberpath="statusname" displaymemberpath="statusname" datamemberbinding="{binding shipped, mode=twoway, updatesourcetrigger=propertychanged}" isvisible="{binding isexist, mode=twoway}"> </telerik:gridviewcomboboxcolumn> 

i tried adding interation triggers couldn't able find exact event pass selecteditem parameter,

<i:interaction.triggers>     <i:eventtrigger eventname="contextmenuclosing">         <i:invokecommandaction command="{binding statusdropdowncommand, mode=oneway}"/>     </i:eventtrigger> </i:interaction.triggers> 

viewmodel:

public icommand statusdropdowncommand { { return new relaycommand(statusdropdown); } }  void statusdropdown() {  } 

kindly help.

updated code:

<telerik:gridviewcomboboxcolumn itemssource="{binding statuslist, mode=twoway, updatesourcetrigger=propertychanged}" selectedvaluememberpath="statusname" displaymemberpath="statusname" datamemberbinding="{binding shipped, mode=twoway, updatesourcetrigger=propertychanged}" isvisible="{binding isexist, mode=twoway}"> <i:interaction.triggers> <converter:routedeventtrigger routedevent="selector.selectionchanged" > <converter:customcommandaction command="{binding selectionchangedcommand}" /> </converter:routedeventtrigger> </i:interaction.triggers> </telerik:gridviewcomboboxcolumn> 

issue occured:

seems subscription selector.selectionchanged routed event should job.

<i:interaction.triggers>         <local:routedeventtrigger routedevent="selector.selectionchanged">             <local:customcommandaction command="{binding selectionchangedcommand}" />         </local:routedeventtrigger> </i:interaction.triggers> 

you need custom trigger handle attached events:

public class routedeventtrigger : eventtriggerbase<dependencyobject> {     routedevent _routedevent;      public routedevent routedevent     {         { return _routedevent; }         set { _routedevent = value; }     }      public routedeventtrigger()     {     }     protected override void onattached()     {         behavior behavior = base.associatedobject behavior;         frameworkelement associatedelement = base.associatedobject frameworkelement;          if (behavior != null)         {             associatedelement = ((iattachedobject)behavior).associatedobject frameworkelement;         }         if (associatedelement == null)         {             throw new argumentexception("routed event trigger can associated framework elements");         }         if (routedevent != null)         {             associatedelement.addhandler(routedevent, new routedeventhandler(this.onroutedevent));         }     }     void onroutedevent(object sender, routedeventargs args)     {         base.onevent(args);     }     protected override string geteventname()     {         return routedevent.name;     } } 

also may use own action triggering command:

public sealed class customcommandaction : triggeraction<dependencyobject> {     public static readonly dependencyproperty commandparameterproperty =         dependencyproperty.register("commandparameter", typeof(object), typeof(customcommandaction), null);      public static readonly dependencyproperty commandproperty = dependencyproperty.register(         "command", typeof(icommand), typeof(customcommandaction), null);      public icommand command     {                 {             return (icommand)this.getvalue(commandproperty);         }         set         {             this.setvalue(commandproperty, value);         }     }      public object commandparameter     {                 {             return this.getvalue(commandparameterproperty);         }          set         {             this.setvalue(commandparameterproperty, value);         }     }      protected override void invoke(object parameter)     {         if (this.associatedobject != null)         {             icommand command = this.command;             if (command != null)             {                 if (this.commandparameter != null)                 {                     if (command.canexecute(this.commandparameter))                     {                         command.execute(this.commandparameter);                     }                 }                 else                 {                     if (command.canexecute(parameter))                     {                         command.execute(parameter);                     }                 }             }         }     } }