C#

WinForms

Single Instance Form in a MDI application

Rafał Klepacz

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1 Oct 2011CPOL 8K   3   1

private void OpenForm() where T : Form, new(){ T frm = (T)new List(this.MdiChildren).Find(f => f is T) ?? new T() { MdiParent = this }; frm.Show(); frm.Focus();}and usageOpenForm();

C#

private void OpenForm<T>() where T : Form, new()
{
    T frm = (T)new List<Form>(this.MdiChildren).Find(f => f is T) ?? new T() { MdiParent = this };

    frm.Show();
    frm.Focus();
}

and usage

C#

OpenForm<NewForm>();

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Written By

Rafał Klepacz

Software Developer

 Poland

This member has not yet provided a Biography. Assume it's interesting and varied, and probably something to do with programming.

Comments and Discussions

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This solution is neat. Maybe it is even more useful to retur... wmjordan1-Oct-11 19:13 wmjordan 1-Oct-11 19:13  This solution is neat. Maybe it is even more useful to return the newly created Form object.

Last Visit: 31-Dec-99 18:00     Last Update: 18-Apr-24 14:43 Refresh 1

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