command - RaiseCanExecuteChanged more convenience -

i'd raisecanexecutechanged when canexecute condition got changed. e.g.:

public class viewmodel { public viewmodel() {     command = new relaycommand(action,condition); }  private  bool condition() {    return  this.condition1&&this.condition2&&this.condition3; }  public bool condition1 {   get{...}   set{.... **command.raisecanexecutechanged();}** } public bool condition2 {    get{...}    set{.... command.**raisecanexecutechanged();}** } public bool condition3 {   get{...}   set{.... **command.raisecanexecutechanged();}** } 

}

that works fine. don't write many raisecanexecutechanged, want set these changes automatically. e.g in relaycommand, create new method named raisechanged

  public void raisechanged(xxxxxx  xxx,  params string[] propertynames)   {       // each property in propertynames,      // raisecanexecutechanged();   } 

i put viewmodel vm parameters, , use vm.propertychanged+=(s,e)=>{} don't think it's way this.

does have other ideas?

i develop solution can that:

c# view model:

public bool canexecutemethod(object sender)       {       } public void buttonexecutemethod(object sender)       {       }  public event action eventnotifycanexecutechanged;  private action _delegatenotifycanexecutechanged; public action delegatenotifycanexecutechanged      {          { return _delegatenotifycanexecutechanged; }          set { _delegatenotifycanexecutechanged = value; }      }  public void canexecuteflag         {    if (eventnotifycanexecutechanged != null) { eventnotifycanexecutechanged(); }    if (_delegatenotifycanexecutechanged != null) { _delegatenotifycanexecutechanged();}          } 

xaml:

< button content="button cmd-excech" horizontalalignment="left" margin="27,231,0,0"          verticalalignment="top" width="120"         command="{mark:bindcommandresource mainwindowviewmodel,         executemethodname=buttonexecutemethod,         canexecutemethodname=canexecutemethod,         eventtoinvokecanexecutechanged=eventnotifycanexecutechanged,         propertyactioncanexecutechanged=delegatenotifycanexecutechanged}"  /> 

i put/share solution in open source project mvvm-wpf xaml mark-up binding extensions - http://wpfmvvmbindingext.codeplex.com