How do I create an instance of a class that is accessible to all
classes/forms in my project? I already have a startup module and I was
thinking putting stuff in there and then accessing it through there.
I need it for things like db connections, security manager, general db
functions, .....
Any help would be appreciated.... .
UJ.
22  1655 
You can create a class that uses the Singleton Pattern.
Something like...
public class DBCentral
private _theInstance as DBCentral
public readonly shared property TheInstance() as DBCentral
get()
if _theInstance is nothing then
_theInstance=ne w DBCentral()
end if
return _theInstance
end get
end property
end class
I didn't check the exact syntax but you get the picture....
--
Bob Powell [MVP]
Visual C#, System.Drawing
Find great Windows Forms articles in Windows Forms Tips and Tricks http://www.bobpowell.net/tipstricks.htm
Answer those GDI+ questions with the GDI+ FAQ http://www.bobpowell.net/faqmain.htm
All new articles provide code in C# and VB.NET.
Subscribe to the RSS feeds provided and never miss a new article.
"UJ" <UJ@nowhere.com > wrote in message
news:O9******** ******@TK2MSFTN GP12.phx.gbl... How do I create an instance of a class that is accessible to all
classes/forms in my project? I already have a startup module and I was
thinking putting stuff in there and then accessing it through there.
I need it for things like db connections, security manager, general db
functions, .....
Any help would be appreciated.... .
UJ.
http://msdn.microsoft.com/architecture
chanmm
"UJ" <UJ@nowhere.com > wrote in message
news:O9******** ******@TK2MSFTN GP12.phx.gbl... How do I create an instance of a class that is accessible to all
classes/forms in my project? I already have a startup module and I was
thinking putting stuff in there and then accessing it through there.
I need it for things like db connections, security manager, general db
functions, .....
Any help would be appreciated.... .
UJ.
Chanmm,
Can you point me in the correct direction? This is a general architecture
page. I don't see anything specific to globals.
UJ.
"chanmmn" <ch*****@hotmai l.com> wrote in message
news:Og******** ******@TK2MSFTN GP12.phx.gbl... http://msdn.microsoft.com/architecture
chanmm
"UJ" <UJ@nowhere.com > wrote in message
news:O9******** ******@TK2MSFTN GP12.phx.gbl... How do I create an instance of a class that is accessible to all
classes/forms in my project? I already have a startup module and I was
thinking putting stuff in there and then accessing it through there.
I need it for things like db connections, security manager, general db
functions, .....
Any help would be appreciated.... .
UJ.
The .NET recommended practice for creating singletons is to use a
single line..
Public Shared ReadOnly Instance As New [ClassName]
For example..
Public NotInheritable Class DBCentral
Public Shared ReadOnly Instance As New DBCentral
Private Sub New()
End Sub
End Class
Sam
On Thu, 17 Feb 2005 17:09:03 +0100, "Bob Powell [MVP]"
<bob@_spamkille r_bobpowell.net > wrote: You can create a class that uses the Singleton Pattern.
Something like...
public class DBCentral
private _theInstance as DBCentral
public readonly shared property TheInstance() as DBCentral
get()
if _theInstance is nothing then
_theInstance=ne w DBCentral()
end if
return _theInstance
end get
end property
end class
I didn't check the exact syntax but you get the picture....
B-Line is now hiring one VB.NET developer for
WinForms + WebServices position with ASPX in future.
Seaking mid to senior level developer. For
information or to apply e-mail sam_blinex_com.
OK I'm completely lost. I think I didn't explain myself correctly. I want to
be able define somewhere a user object called SecurityManager (which I
wrote). I want to be able to define it somewhere so I can reference it from
all kinds of objects. I have found so far that what I can do is create a
startup module (let's call it StartItUp), and create the instance of the
class as public in there. But then I always need to reference my Security
Manager as StartItUp.SecMa nager.
Is there an easier way?
TIA - UJ
"Samuel R. Neff" <bl****@newsgro up.nospam> wrote in message
news:b4******** *************** *********@4ax.c om...
The .NET recommended practice for creating singletons is to use a
single line..
Public Shared ReadOnly Instance As New [ClassName]
For example..
Public NotInheritable Class DBCentral
Public Shared ReadOnly Instance As New DBCentral
Private Sub New()
End Sub
End Class
Sam
On Thu, 17 Feb 2005 17:09:03 +0100, "Bob Powell [MVP]"
<bob@_spamkille r_bobpowell.net > wrote:
You can create a class that uses the Singleton Pattern.
Something like...
public class DBCentral
private _theInstance as DBCentral
public readonly shared property TheInstance() as DBCentral
get()
if _theInstance is nothing then
_theInstance=ne w DBCentral()
end if
return _theInstance
end get
end property
end class
I didn't check the exact syntax but you get the picture....
B-Line is now hiring one VB.NET developer for
WinForms + WebServices position with ASPX in future.
Seaking mid to senior level developer. For
information or to apply e-mail sam_blinex_com.
In your start-up module, you can just create a public instance and use it
throughout your applciation:
PUblic myClassInstance as myClass = new myclass
You can then referr to myClassInstance throughout your applicaiton. Hope I
understood your question correctly.
"UJ" wrote: How do I create an instance of a class that is accessible to all
classes/forms in my project? I already have a startup module and I was
thinking putting stuff in there and then accessing it through there.
I need it for things like db connections, security manager, general db
functions, .....
Any help would be appreciated.... .
UJ.
Thats rubbish. This gives you a new instance of the class every time you ask
for it. Not a single persistent instance that can store instance data.
--
Bob Powell [MVP]
Visual C#, System.Drawing
Find great Windows Forms articles in Windows Forms Tips and Tricks http://www.bobpowell.net/tipstricks.htm
Answer those GDI+ questions with the GDI+ FAQ http://www.bobpowell.net/faqmain.htm
All new articles provide code in C# and VB.NET.
Subscribe to the RSS feeds provided and never miss a new article.
"Samuel R. Neff" <bl****@newsgro up.nospam> wrote in message
news:b4******** *************** *********@4ax.c om...
The .NET recommended practice for creating singletons is to use a
single line..
Public Shared ReadOnly Instance As New [ClassName]
For example..
Public NotInheritable Class DBCentral
Public Shared ReadOnly Instance As New DBCentral
Private Sub New()
End Sub
End Class
Sam
On Thu, 17 Feb 2005 17:09:03 +0100, "Bob Powell [MVP]"
<bob@_spamkille r_bobpowell.net > wrote:
You can create a class that uses the Singleton Pattern.
Something like...
public class DBCentral
private _theInstance as DBCentral
public readonly shared property TheInstance() as DBCentral
get()
if _theInstance is nothing then
_theInstance=ne w DBCentral()
end if
return _theInstance
end get
end property
end class
I didn't check the exact syntax but you get the picture....
B-Line is now hiring one VB.NET developer for
WinForms + WebServices position with ASPX in future.
Seaking mid to senior level developer. For
information or to apply e-mail sam_blinex_com.
What's easier than....
public class SecurityManager
private _sm As new SecurityManager
public readonly shared TheSecurityMana ger() as SecurityManager
get
return _sm
end get
end property
end class
Now whenever you need to access your security manager you use...
SecurityManager .TheSecurityMan ager.SomeMethor OrOther()
--
Bob Powell [MVP]
Visual C#, System.Drawing
Find great Windows Forms articles in Windows Forms Tips and Tricks http://www.bobpowell.net/tipstricks.htm
Answer those GDI+ questions with the GDI+ FAQ http://www.bobpowell.net/faqmain.htm
All new articles provide code in C# and VB.NET.
Subscribe to the RSS feeds provided and never miss a new article.
"UJ" <UJ@nowhere.com > wrote in message
news:%2******** ********@TK2MSF TNGP10.phx.gbl. .. OK I'm completely lost. I think I didn't explain myself correctly. I want
to be able define somewhere a user object called SecurityManager (which I
wrote). I want to be able to define it somewhere so I can reference it
from all kinds of objects. I have found so far that what I can do is
create a startup module (let's call it StartItUp), and create the instance
of the class as public in there. But then I always need to reference my
Security Manager as StartItUp.SecMa nager.
Is there an easier way?
TIA - UJ
"Samuel R. Neff" <bl****@newsgro up.nospam> wrote in message
news:b4******** *************** *********@4ax.c om...
The .NET recommended practice for creating singletons is to use a
single line..
Public Shared ReadOnly Instance As New [ClassName]
For example..
Public NotInheritable Class DBCentral
Public Shared ReadOnly Instance As New DBCentral
Private Sub New()
End Sub
End Class
Sam
On Thu, 17 Feb 2005 17:09:03 +0100, "Bob Powell [MVP]"
<bob@_spamkille r_bobpowell.net > wrote:
You can create a class that uses the Singleton Pattern.
Something like...
public class DBCentral
private _theInstance as DBCentral
public readonly shared property TheInstance() as DBCentral
get()
if _theInstance is nothing then
_theInstance=ne w DBCentral()
end if
return _theInstance
end get
end property
end class
I didn't check the exact syntax but you get the picture....
B-Line is now hiring one VB.NET developer for
WinForms + WebServices position with ASPX in future.
Seaking mid to senior level developer. For
information or to apply e-mail sam_blinex_com.
Global variable usage is a very poor architectural choice. If you use them,
and global methods then you go back to the dark-ages of unstructured non
object oriented programming and create horrible spaghetti code. That's why
there is no mention of them in the architecture guidelines.
Of course, if you're moving over from VB6 you will be used to the concept of
spaghetti and feel quite at home with it but VB6 wasn't ever a real
programming language ;-).
--
Bob Powell [MVP]
Visual C#, System.Drawing
Find great Windows Forms articles in Windows Forms Tips and Tricks http://www.bobpowell.net/tipstricks.htm
Answer those GDI+ questions with the GDI+ FAQ http://www.bobpowell.net/faqmain.htm
All new articles provide code in C# and VB.NET.
Subscribe to the RSS feeds provided and never miss a new article.
"UJ" <UJ@nowhere.com > wrote in message
news:e$******** ******@TK2MSFTN GP12.phx.gbl... Chanmm,
Can you point me in the correct direction? This is a general architecture
page. I don't see anything specific to globals.
UJ.
"chanmmn" <ch*****@hotmai l.com> wrote in message
news:Og******** ******@TK2MSFTN GP12.phx.gbl... http://msdn.microsoft.com/architecture
chanmm
"UJ" <UJ@nowhere.com > wrote in message
news:O9******** ******@TK2MSFTN GP12.phx.gbl... How do I create an instance of a class that is accessible to all
classes/forms in my project? I already have a startup module and I was
thinking putting stuff in there and then accessing it through there.
I need it for things like db connections, security manager, general db
functions, .....
Any help would be appreciated.... .
UJ.
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