You are using ListView and you have already handled Mouse Click[DoubleClick] event. I guess you are using the MouseEventArgs object somwhere. If you are not, you can create a method which contains all your code and then you can call the method in your click-handler as well as key-handler. If you ARE using the MouseEventArgs object, then, in key event handler, you probably need to create a MouseEventArgs class object <yourargsobject> and set the properties accordingly (if args object allows you to do so) and then you will be needed to apply solution suggested by _Maxxx_ with slight modification as:
<mousedoubleclickhandlermethodname>(<listviewname>, <yourargsobject>);</yourargsobject></listviewname></mousedoubleclickhandlermethodname>