Display msgbox asking to close the open child form while trying to open new child form

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1.00/5 (1 vote)

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Hi,

I m having 12 forms in my application. I want to display a message box asking the user to close the existing opened child form before opening other.

I had tried the following the code:

C#

Form curfrm;

String a = " Please Close other open window ";

private void admissionForm1ToolStripMenuItem_Click(object sender, EventArgs e)
       {
           adfrm1 af1 = new adfrm1(null);
           if (curfrm != null)
           {
               MessageBox.Show(a);
               return;
           }
           else
           {
               curfrm = af1;
               af1.MdiParent = this;
               af1.Show();
           }

This doesn't allow me to open the other forms after closing the child form.

Thanks.

Posted 1-Mar-12 16:09pm

Member 8658209

Updated 1-Mar-12 18:39pm

Dinesh Mani

v3

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Comments

Sergey Alexandrovich Kryukov 1-Mar-12 22:38pm

What an abuse of simple human logic. I can imagine what a user of such thing can feel.
--SA

CodeHawkz 1-Mar-12 23:56pm

@SA: He might be having his own reasons. Let's not critisize but try and help. :)
@Member 8658209: All you want to show is one child window at a time. Is it?

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Dinesh Mani · Accepted Answer · 2012-03-01T18:38:00

If you wish to show only one child form at a time then use a simple token logic to implement the rule.

Have a global static variable, preferably a string that can store the current child form name, that would act as the token.

On all the child forms' constructor implement the following pesudo code -

VB

if GlobalToken = "" then
    GlobalToken = CurrentForm.Name
else
    Show Message
end if

On all the child forms' destructor clear the token -

VB

GlobalToken = ""