Question

I’ve set an eventhandler to an event like this:

 frm.FormClosed += (sender,  args) =>
                    {
                        if (this.myGrid.Enabled)
                        {
                            this.myGrid.Select();
                        }
                    };
 frm.Show();

I want to hang out the eventhandler after the form was closed.

Can you help me?

Answer 1

I want to hang out the eventhandler after the form was closed.

I assume you want to remove it.

1. Not necessary, don’t waste time on it. When the Form is closed (and Disposed), the eventhandler will be collected too. It is a member of the same Form, that follows from the word this in the code.

2. If you still want to remove it, you will need a copy:

    FormClosedEventhandler closeHandler;  // class member
   
   
   
    closeHandler = (sender,  args) =>  
         {
            if (this.myGrid.Enabled)
            {
               this.myGrid.Select();
            }
         };
   
    frm.FormClosed += closeHandler ; // OnLoad
    ...
   
    frm.FormClosed -= closeHandler ; // OnClose