C# Winforms Parent Child Instances

Question

In my application... to navigate between winforms what i do is that i make an object of the form that needs to be shown and i use

Register reg = new Register()
reg.show();

this thing has two problems

• if i do it with a button, more than one instance of same form could be opened.
• if i close through which the instance was created, the child form stays opend.

what is the solution....

Answer 1

Take a look at this code sample from MSDN code gallery. If you go through the code in detail, you should be good to go

Answer 2

have the child form take as a parameter the parent form:

Form2 f2 = new Form2(this);
this.hide();
f2.show();

then when you wish to close the new form you just close it and show the parent form again.

code from Form2:

private Form Fatherform;

Form2(Form father){
   Fatherform = father;
}

Form2_closeevent( ... )
{
    if(Fatherform != null)
       Fatherform.show();