two Forms move together?

willyyan

Hi guys,

i have two forms, one is mainForm, another is childForm.I wanna this effect that if i draw either of this two forms the other one will be followed, that means the two always move together. I wrote the code in mainForm like this

childFrom childFm = new childFrom();
private void mainForm_LocationChanged(object sender, EventArgs e)
        {
            Point childformLocation = new Point();
            childformLocation.X = this.Location.X ;
            childformLocation.Y = this.Location.Y + this.Height;
            childFm.Location = subformLocation;
        }

then i got the result that when if move the mainForm, the subForm will follow. Now my problem is i do not know how to write the corresponding code in the childForm to make the mainForm follow when i drag the childForm.

Anyone can bring me out

bja

If the sender parameter of in event handler is the moved form, than you could solve it like that:

Create an event handler that handles both of those cases:
if sender is the main form => move the child.
if it's the child => move the main form.

Just register this handler for the LocationChanged event of both forms.

Cheers

willyyan

bja schrieb:

If the sender parameter of in event handler is the moved form, than you could solve it like that:

Create an event handler that handles both of those cases:
if sender is the main form => move the child.
if it's the child => move the main form.

Just register this handler for the LocationChanged event of both forms.

Cheers

hi, thanks for your quick reply. I am new to C#, so could u give me same sample code?

Thx

willyyan

hi,

anyone could explain how can i implement this effect in detail.
i am urgent.

Thx in advance!!

Knuddlbaer

....

Swap main and child.

private void childForm_LocationChanged(object sender, EventArgs e)
        {
            Point mainformLocation = new Point();
            mainformLocation.X = this.Location.X ;
            mainformLocation.Y = this.Location.Y - this.Height;
            mainFm.Location = subformLocation;
        }

willyyan

Knuddlbaer schrieb:

....

Swap main and child.

private void childForm_LocationChanged(object sender, EventArgs e)
        {
            Point mainformLocation = new Point();
            mainformLocation.X = this.Location.X ;
            mainformLocation.Y = this.Location.Y - this.Height;
            mainFm.Location = subformLocation;
        }

it seems not so easy. Because i can not register mainForm in childForm.cs like this.

mainForm mainFm = new mainForm();

if i do so, the mainForm will not show up. i do not know why?

So how can i access the instance of the mainForm from childForm code.

Knuddlbaer

Pls view the Properties from your form in MSDN. You will find Parent, MdiParent, Owner etc