MDI forms

Rudi Steelman

Please try to understand my need.

I have a project it has 3 froms.

Form1 is - MDI Parent
Form2 is - MDI Child
Form3 is - MDI child

I have already open the Form2 inside Form1(The parent form).

Form2 has a button.if clicked i want to open From3 inside the parent form(in my case it is Form1)

I already use the

Form2 form2 = new Form2();
from2.Mdiparent = this;
form2.show();

but i cant use the same code to open Form3 in the parent form(The parent form is Form1) because now i'm on the form2 so i can't use the key " this " am i correct?

please help me on this please.

6 Replies

Know the answer? Post it — somebody with the same question will find it here.

Vulpes15y ago
Accepted answer
As I said in your previous thread (http://www.c-sharpcorner.com/Forums/Thread/123606/about-mdi-forms.aspx), to open Form3 as an mdi child of Form1 from Form2 you'll need code such as this:

Form3 f3 = new Form3();
f3.MdiParent = this.MdiParent; // 'this' refers to the current instance of Form2 and so Form3 will share the same parent, namely Form1
f3.Show();
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Vilas Gite15y ago
Hi Rudi if you solve your problem then just Accept answer.
The moto is that post became closed. :)
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Rudi Steelman15y ago
Thank u it works i search for it in the web from the last week thanks a lot.
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Vilas Gite15y ago
Hi, Rudi,
Are you want two forms will activated in a single button click?then its possible.

please ensure your MDI parent forms properties check it-IsMdiContainer=true;

private void button1_Click(object sender, EventArgs e)
{
Form2 frm2 = new Form2();
frm2.MdiParent = this;
frm2.Show();

Form3 frm3 = new Form3();
frm3.MdiParent = this;
frm3.Show();
}

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Checked Answer Box if, you solve your post........
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Rudi Steelman15y ago
thanks bro

i'll check this and reply to u
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Suthish Nair15y ago
Rudi, don't create duplicate threads.
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