MDI Parent Form Problem setting Parent

Question

I am using a MDI parent form that has a childs and they show up very well when they are called up by this parent and i use to intensiate child form as

ChildForm          


        

Answer 1

write this code in a parent form....

childform  obj = new childform( );
               obj.MdiParent = this;
               obj.StartPosition = FormStartPosition.CenterScreen;
               obj.Show( );

Answer 2

To create a child from another child, just write it like this:

ChildForm sibling = new ChildForm();
sibling.MdiParent = this.MdiParent;
sibling.Show();

Or fire a custom event that the parent can respond to.

Answer 3

You should set the Parent to be the already existing mdiform, not create a new one.

If there isn't an instance of the mdiform already, you should not only create an instance of the form, but also show it.

var mdiForm = new MdiForm();
mdiForm.IsMdiContainer = true;
var childForm = new ChildForm();
childForm.MdiParent = mdiForm;
mdiForm.Show();
childForm.Show();

Also notice that I use mdiForm.IsMdiContainer, AFAIK there is no IsMdiParent property.

Answer 4

class MainClass
{
   public string path = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
   public void showWindow(Form openWin, Form closeWin, Form MDI)
    {
        closeWin.Close();
        openWin.WindowState = FormWindowState.Minimized;
        openWin.MdiParent = MDI;
        openWin.Show();
    }
}