MDI Parent and Child form - Close Child

I am developing a MDI application with a couple of child windows inside the Parent window (frmMain). Each project consists of 2 child windows (frmData and frmPlot).

I have a Main Menu which is used to create new Project / open new Project.

I want only one Project at a given instant. So when I click on New project menu item (mnuNew_click event) it should close the already open child windows before creating a new project. I tried to use following code but it does not close any child forms. Has someone dealt with similar problem

I am using Visual C++ .Net 2003 on Win XP

--
private: System::Void mnuNew_Click(System::Object * sender, System::EventArgs * e)
        {
             frmPlot * plt = new frmPlot();
             plt->Close();
             frmData * dat = new frmData();
             dat->Close();
             frmNew * frmNew = new frmNew();
             frmNew->ShowDialog(this);
         }

Any pointers would be very helpful

thanks

Suneet

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MDI Parent and Child form - Close Child

gareon
thanks Luis and ThE_lOtUs.. that worked
Hadas Rodal
You can loop in the Form.MdiChildren to get all the child forms.

jamesb

What you are doing there is creating new forms and then closing them, not closing the existing ones:

I'd do something like this (it's C# but hopefully you'll get the idea):

private void mnuNew_Click(object sender, EventArgs e)
{
    // Close all children
    foreach(Form childForm in this.MdiChildren)
        childForm.Close();
 
    // Create new forms and set them as MDI child
    frmPlot form1 = new frmPlot();
    form1.MdiParent = this;
    form1.Visible = true;

    frmData form2 = new frmData();
    form2.MdiParent = this;
    form2.Visible = true;
}

I hope this helps!

Luis Alonso Ramos

MDI Parent and Child form - Close Child

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