How to prevent from open the same form

[nuttynibbles]

hi, if i have already open form1, how do i check and not open form1 again??

[i gr8]

i think there is property called isActiveForm, check using this. or else while opening the form assign a golbal variable (say true), and set this to false on closing that form. using this global variable u can validate whether the form is opened or not

[thatraja]

assume if you are checking the form "form1", code is below.

public static Form IsFormAlreadyOpen(Type FormType)
{
foreach (Form OpenForm in Application.OpenForms)
{
if (OpenForm.GetType() == FormType)
return OpenForm;
}
return null;
}

    private void button1\_Click(object sender, EventArgs e)
    {
        Form frmTest;
        if ((frmTest = IsFormAlreadyOpen(typeof(Form1))) == null)
        {
            frmTest = new Form1();
            frmTest.Show();
        }
        else
        {
            frmTest.WindowState = FormWindowState.Normal;
            frmTest.BringToFront();
        }
    }

this code opens the form if it's not already open otherwise it'll make active form. thatraja

[nuttynibbles]

hi thatraja, tks. erm i forgot to mention that i was doing it for windows mobile =). so Application.OpenForms is not available

[OriginalGriff]

If this is the same App we talked about yesterday, the list you created to show which forms need to be closed would also double up as a list of open forms wouldn't it? If it needs to be closed at log off, it's open...

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