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AnswerRe: Use textfile as source for a combo boxes items? Pin
Christian Graus8-Sep-07 16:21
protectorChristian Graus8-Sep-07 16:21 
GeneralRe: Use textfile as source for a combo boxes items? Pin
clashie8-Sep-07 17:42
clashie8-Sep-07 17:42 
QuestionMarshalling Pin
aruna_koride8-Sep-07 13:46
aruna_koride8-Sep-07 13:46 
QuestionPropertyGrid Binding in WPF Pin
aruna_koride8-Sep-07 13:38
aruna_koride8-Sep-07 13:38 
QuestionUsing Low Level keyboard hook problem [modified] Pin
kamalesh828-Sep-07 12:03
kamalesh828-Sep-07 12:03 
QuestionSingle instance forms in an MDI app Pin
martin_hughes8-Sep-07 9:20
martin_hughes8-Sep-07 9:20 
AnswerRe: Single instance forms in an MDI app [modified] Pin
Ed.Poore8-Sep-07 12:25
Ed.Poore8-Sep-07 12:25 
GeneralRe: Single instance forms in an MDI app [modified] Pin
martin_hughes8-Sep-07 13:38
martin_hughes8-Sep-07 13:38 
Problem with this is that once the login form has been opened and closed once, it gets disposed, so neither the Show() or Activate() methods will work.

Easily fixed by hacking your example and adding an additional else if:

if (!this.SingleInstanceForms.ContainsKey(typeof(T)))
{
    T newForm = new T();
    this.SingleInstanceForms.Add(typeof(T),newForm);
    newForm.MdiParent = this;
}
else if (this.SingleInstanceForms[typeof(T)].IsDisposed)
{
    T newForm = new T();
    this.SingleInstanceForms[typeof(T)] = newForm;
    newForm.MdiParent = this;
}


But doing so looks a bit errrmm inellegant - although I'm sure that it could be refactored out to be made nicer (but it's late and I've had a couple of beers). Or microsoft could implement an UnDispose() method Smile | :)

Anyway, cheers - it was interesting having a look at generics, which I haven't really dipped into yet.

A quick question:

protected virtual void ActivateChildForm<T>() where T : Form, new()


I guess that the where T : Form limits what can be passed in as <T>, but what's the new() about?



Me: Can you see the "up" arrow?
User:Errr...ummm....no.
Me: Can you see an arrow that points upwards?
User: Oh yes, I see it now!

-Excerpt from a support call taken by me, 08/31/2007

GeneralRe: Single instance forms in an MDI app Pin
Ed.Poore8-Sep-07 13:51
Ed.Poore8-Sep-07 13:51 
GeneralRe: Single instance forms in an MDI app Pin
martin_hughes8-Sep-07 14:18
martin_hughes8-Sep-07 14:18 
GeneralRe: Single instance forms in an MDI app Pin
Ed.Poore9-Sep-07 0:19
Ed.Poore9-Sep-07 0:19 
GeneralRe: Single instance forms in an MDI app Pin
martin_hughes9-Sep-07 7:36
martin_hughes9-Sep-07 7:36 
GeneralRe: Single instance forms in an MDI app Pin
Ed.Poore9-Sep-07 9:12
Ed.Poore9-Sep-07 9:12 
GeneralRe: Single instance forms in an MDI app Pin
Ed.Poore9-Sep-07 13:39
Ed.Poore9-Sep-07 13:39 
QuestionNeed an Algorithm like 'Word Wrap' in notepad. Pin
hdv2128-Sep-07 6:54
hdv2128-Sep-07 6:54 
AnswerRe: Need an Algorithm like 'Word Wrap' in notepad. Pin
Giorgi Dalakishvili8-Sep-07 7:26
mentorGiorgi Dalakishvili8-Sep-07 7:26 
QuestionConsuming Java Web Service using C# Pin
arctix8-Sep-07 4:48
arctix8-Sep-07 4:48 
AnswerRe: Consuming Java Web Service using C# Pin
Guffa8-Sep-07 4:58
Guffa8-Sep-07 4:58 
QuestionRe: Consuming Java Web Service using C# [modified] Pin
arctix9-Sep-07 2:57
arctix9-Sep-07 2:57 
QuestionGenerics Problem Question Pin
PaulPrice8-Sep-07 4:44
PaulPrice8-Sep-07 4:44 
AnswerRe: Generics Problem Question Pin
Giorgi Dalakishvili8-Sep-07 4:49
mentorGiorgi Dalakishvili8-Sep-07 4:49 
GeneralRe: Generics Problem Question Pin
PaulPrice8-Sep-07 4:58
PaulPrice8-Sep-07 4:58 
GeneralRe: Generics Problem Question Pin
Giorgi Dalakishvili8-Sep-07 5:05
mentorGiorgi Dalakishvili8-Sep-07 5:05 
GeneralRe: Generics Problem Question Pin
PaulPrice8-Sep-07 5:11
PaulPrice8-Sep-07 5:11 
GeneralRe: Generics Problem Question Pin
Giorgi Dalakishvili8-Sep-07 5:18
mentorGiorgi Dalakishvili8-Sep-07 5:18 

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