Comments on: A Generic Singleton Form Provider for C#

By: Nanu

Nanu — Wed, 22 Jun 2011 14:47:09 +0000

Excelente trabajo! Muchísimas gracias por compartirlo…!
Felicitaciones!!

Saludos cordiales desde Argentina

By: Ganga

Ganga — Fri, 10 Jun 2011 06:59:24 +0000

That’s an amazing solution. I second your statement about being as elegant as it can get.

Works like a charm.

Thanks heaps for that.

By: jeff

jeff — Thu, 25 Nov 2010 00:14:03 +0000

Its working now! thanks, How could I miss that…
using System.Windows.Forms;

Thanks a lot.

By: jeff

jeff — Wed, 24 Nov 2010 00:43:38 +0000

im getting this,

Error 2 The type or namespace name ‘Form’ could not be found (are you missing a using directive or an assembly reference?)

do i need to change the Form to the name of the Form i need to be singleton? how?

Thnak you.

By: Rizwan

Rizwan — Wed, 22 Sep 2010 14:35:56 +0000

Thanks for your very nice example. Its really very worthful.

By: Alvaro

Alvaro — Wed, 21 Jul 2010 10:12:23 +0000

Hello David!
Thanks for the code above. It’s perfect for me.
In my code I have included two more things:
1. MdiParent
2. BringToFront
The only thing I have changed is the GetInstance method:
public static T GetInstance(Form owner, params object[] args) where T : Form
{
if (!mTypeFormLookup.ContainsKey(typeof(T)))
{
Form f = (Form)Activator.CreateInstance(typeof(T), args);
mTypeFormLookup.Add(typeof(T), f);
f.Owner = owner;
f.MdiParent = owner;
f.FormClosed += new FormClosedEventHandler(remover);
}
else
{
Form f;
mTypeFormLookup.TryGetValue(typeof(T),out f);
f.BringToFront();
}
return (T)mTypeFormLookup[typeof(T)];
}

By: James

James — Wed, 21 Apr 2010 17:04:03 +0000

Thank you so much.
Huge help.

By: Sudhi

Sudhi — Fri, 05 Mar 2010 02:31:44 +0000

Thank you for Nice example

By: Nuno Coimbra

Nuno Coimbra — Mon, 18 May 2009 09:09:30 +0000

Hello David!

I’m know for, sometimes, miss the tinny picture, i.e., the details… By rushing into things without proper first reading.

My code is exactly the one here. I’ve created a new C# project, copy and pasted your code into it and run it. In fact I was surprised it didn’t work, since I’ve seen no reason for it to fail… Until now. Now I see what I’ve missed. :S It’s supposed to be used with regular forms… duh!

Thanks! As I said before, this is truly a cool implementation and it can provide me a way for getting rid of all my Singleton forms… I’ll put it to a good test.

By: David Hammerton

David Hammerton — Sat, 16 May 2009 22:34:40 +0000

Hi Nuno,

There isn’t any reason for it not to work under .NET 3.5, that I can see. What’s the exact problem you’re seeing?

You are correct, you don’t inherit from the Singleton object, your Forms shouldn’t be ‘Singleton objects’. You simply use the class’ GetInstance method to create singleton instances of forms for you.

Feel free to paste your code if you are having trouble.

David