Question

I have two forms in my project, form1 and form2. I have added a new class to my project. It has a method which accepts a form object and it should be able to do following things.

1. show the accepted form object (frm.ShowDialog())

2. When I press enterkey on the displayed form (frm) it should close. (without adding code to form2 s keydown event). it should be handled by the newly added class.

I tried to add new keyeventhandler but I don’t know how to proceed from here. (Dispose() doesnt work)Please help me to solve this. Thank you.

class Class1
{
    public static void SearchResultBox(Form2 frm) 
    {            
        frm.KeyDown += new KeyEventHandler(frm_KeyDown);
        frm.ShowDialog();

    }

    static void frm_KeyDown(object sender, KeyEventArgs e)
    {
        if (e.KeyCode==Keys.Enter)
        {


        }
        throw new NotImplementedException();
    }

}

Answer 1

You need to keep a reference to the form passed in and then use that reference to close the form

class Class1 
{   
    private static Form2 _frm = null;  
    public static void SearchResultBox(Form2 frm)      
    {                     
         _frm = frm;
         frm.KeyDown += new KeyEventHandler(frm_KeyDown);         
         frm.ShowDialog();      
    }      
    static void frm_KeyDown(object sender, KeyEventArgs e)     
    {         
        if (e.KeyCode==Keys.Enter)         
        {     
             if(_frm != null)
             {      
                 _frm.Close();
                 _frm.Dispose();
             }
        }         
    }
}