Delegate and event to refresh Parent and Child forms

1. Define an event in childfrm,

C # code public delegate void refresheventhandle ();
Public event refresheventhandle onrefreshevent; 2. Determine the refreshed event handler function in mainfrm;
// Before childfrm is displayed, add the following code childfrm. onrefreshevent + = new refresheventhandle (this. refreshdata); 3. Add the callback function private void refreshdata () to mainfrm ()
{
// Anything you want to do when you disable childfrm
}
4. Add the following code to the childfrm_formclosed event (Public void net_xjcjbm_skjsxx_formclosed (Object sender, formclosedeventargs E) in childfrm: If (null! = Onrefreshevent)
{
This. onrefreshevent ();}