How to Load Form inside panel other form in win app

Question

I Create a Windows Forms application with C#.

I have a general Form and a panel on it.

I show subForm into this panel with code:

SubForm objForm= SubForm.InstanceForm();
this.IsMdiContainer = true;
objForm.TopLevel = false;
pnlSubSystem.Controls.Add(objForm);
objForm.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
objForm.Dock = DockStyle.Fill;
objForm.Show();

now I want to show other form on subForm of this panel, But I dont know how to do it.

Answer 1

I think your problem resolved by this code:

    SubForm objForm= SubForm.InstanceForm();
    objForm.TopLevel = false;
    pnlSubSystem.Controls.Add(objForm);
    objForm.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
    objForm.Dock = DockStyle.Fill;
    objForm.Show();

Answer 2

As I understand, you're very close. To add another form into subform try the same code instead:

pnlSubSystem.Controls.Add(objForm);

use (where objForm2 is the new subForm)

SubForm objForm2 = new SubForm();
objForm.Controls.Add(objForm2); 

Answer 3

Since you already got the answer that by removing this.IsMdiContainer = true; your code would run perfectly fine. Because IsMdiContainer property changes the display and behavior of the form to an MDI parent form. When this property is set to true, the form displays a submerged client area. All MDI child forms assigned to the parent form are displayed within its client area.

SubForm objForm= SubForm.InstanceForm();
objForm.TopLevel = false;
pnlSubSystem.Controls.Add(objForm);
objForm.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
objForm.Dock = DockStyle.Fill;
objForm.Show();

objForm form which will be the template for the child forms. Each time you want to create a new child window to your application, you can create a new instance of this template form and make the first form as its parent form.

//Create a new instance of the MDI child template form
SubForm objForm = new SubForm(); 
//Set parent form for the child window 
objForm.MdiParent=this; // Last ObjForm or something
//Display the child window
objForm.Show();

Answer 4

Another way:

objForm.TopLevel = false;
objForm.Parent = pnlSubSystem;
objForm.Show();

This is my first answer on Stackoverflow.