event problem

Question

public event Handler nameinsert; public delegate void Handler(object Sender); public void check() { ... nameinsert(this); } //authorform_newname is een event that is catched private void authorform_newname(object Sender cAuthorArgs e) { ... check(); } I receive a System.NullReferenceException: Object reference not set to an instance of an object from the nameinsert(this) Does someone know why???

lemoinek · Answer

thx i found my problem i called the check() in my constructor but then the eventhandler didn't exist yet. I just had to call the function check() after the creation of my eventhandler.

kyle_hankinson · Answer

Your nameinsert isnt set to do anything. You should have something like nameinsert += new Handler ( foo ); in your constructor... also try chaning nameinsert(this); to be if ( nameinsert != null ) nameinsert ( this );