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Global Variables C#
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12/12/2009 15:11:12
Cetin Basoz
Engineerica Inc.
Izmir, Turquie
 
 
Information générale
Forum:
ASP.NET
Catégorie:
Code, syntaxe and commandes
Versions des environnements
Environment:
C# 3.0
Divers
Thread ID:
01438724
Message ID:
01438778
Vues:
57
>>>Cetin.
>>>
>>>I have a class like this called myAppConstants, but I'm interesting in variables, not constants, that span all forms
>>>A good example is the ID of the user who logs into the application.
>>>All forms need that information.
>>>I'm rolling it forward from form to form using properties.
>>>Am I missing something?
>>>
>>>
>>>
>>>
>>>
>>>>>you again refer to it as:
>>>myApplication.definitions.myConStr
>>>
>>>However if value is changed it's only 'definitions' class that you need a recompile (other classes obtain value at runtime despite compile time if it's a field and not a constant). Also with constants and fields you're not limited to simple types and could get the value using a method (and say read from a txt,xml file or ask to user etc). ie:
>>
>>Yes, you are missing that I suggest an alternative to constants in that message's question. Sample shows readonly which instead you might use read/write property.
>>Cetin
>
>That is suggested by Bill Wagner as well in his excellent books "Effective C#" and "More Effective C#". In fact it is the second of 50 tips in the first book: "Prefer readonly to const".
>
>Good books, BTW. The second one focuses on new features in C# 3.0 and 3.5. He is probably running like a hamster on a wheel on another volume, covering C# 4.0, even as we speak ;-)

I hope to read those books and at the moment I am doing some Silverlight 4 with WCF services on 4.0:)
Cetin
Çetin Basöz

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