Windows Mobile Support

  • Subscribe to our RSS feed.
  • Twitter
  • StumbleUpon
  • Reddit
  • Facebook
  • Digg

Thursday, 9 June 2011

Fields vs properties

Posted on 07:16 by Unknown
De unde a pornit totul:
De la o discutie in care se spunea ca la inceput este mai bine sa folosim field-uri si nu proprietatiile, iar in cazul in care ajungem sa avem nevoie de ele, le putem înlocuii in orice moment cu propietati.

Aici apare o problema. Din punct de vedere a framework-ului field-urile si proprietatiile sunt total diferite (sunt binar incompatibile). Din aceasta cauza o sa fim nevoiti sa recompilam toate assembly-urile care folosesc obiectul nostru.
In cazul in care folosim reflection la accesarea field-urilor trebuie modificat, deoarece modul in care proprietatiilese acceseaza este diferit.
Singurul avantaj care apare la field-uri este performanta, care poate sa fie îmbunătățita foarte mult. Totodata field-urile pot sa fie folosite ca si parametri ref sau out.
Cand se folosesc propietati se poate controla modul in care valoarea se seteaza (validare) sau se obtine (get,set). In cazul in care modifiarea unei proprietati produce modificarea altor valori, acest lucru poate sa fie foarte usor de facut cu o proprietate.
Problema s-ar pune intre proprietăți automate si field-uri publice. Din punct de vedere a implementarii, este mult mai usor sa schimbam implementarea la o proprietate daca vrem sa facem ceva mai special, fara sa fim nevoiti sa recompilam toata solutia. De exemplu sa avem private setter.
Cea ce nu putem face cu proprietati, este sa le setam o valurea de default in mod automat. Acest lucru trebuie facut in constructor sau intr-o metoda de initializare.
  • Ca si concluzie o sa enumar avantajele pe care le avem daca folosim proprietati publice si nu field-uri publice:
  • lazy loading;
  • propietatiile pot sa arunce erori;
  • daca lucram cu data binding trebuie sa folosim propietati;
  • se poate adauga validare cand o valoare se seteaza;
  • fine-grained control (logging intr-un fisier de exemplu, validare);
  • pot sa fie virtual si se poate face overwritten;
  • pot sa apara in interfata;
Ce parere aveti? Exista un motiv pentru care am putea sa avem field-uri publice?
Email ThisBlogThis!Share to XShare to FacebookShare to Pinterest
Posted in field, property | No comments
Newer Post Older Post Home

0 comments:

Post a Comment

Subscribe to: Post Comments (Atom)

Popular Posts

  • Content Types - Level 6: Rich Media
    Level 6: Rich Media NOTE: This is part 7 of 7 and the conclusion of this continuing series; please see earlier posts for more background inf...
  • Password/Token/PIN definition
    Password, Token, PIN, Passcode… every day we use this items when we need to authenticate in different systems. I observed that there are tim...
  • Publishing our CellCast Widget for iPad
    The rush has been on this week as our development team worked to design a new version of our CellCast Widget specifically for Apple's up...
  • Content Types - Level 4: Reference
    Level 4: Reference Materials & Static Content NOTE: This is part 5 of 7 in a continuing series; please see earlier posts for more backgr...
  • Shared Access Signature and URL encoding on Windows Azure
    Playing a little with Shared Access Signature was quite nice. In this moment this new functionality has a great potential. Playing a little ...
  • mLearning Testing Tools & Methods
    As active practitioners and consultants for enterprise mobile learning initiatives, a frequent question we get asked is “What kinds of tools...
  • Content Types - Level 2: SMS Campaigns
    Level 2: Interactive Messaging NOTE: This is part 3 of 7 in a continuing series; please see earlier posts for more background information. L...
  • Some scenarios when we can use Shared Access Signature from Windows Azure
    In this post we will talk about some possible scenario when Shared Access Policy can be used. We will discuss about a different scenario for...
  • mLearning Tech A’plenty Released at CES 2011
    It is the first week in January and the annual International CES (“Consumer Electronics Show”) is in full swing out in Las Vegas – just as ...
  • Content Types - Level 3: Voice
    Level 3: Voice-based Content and Assessments NOTE: This is part 4 of 7 in a continuing series; please see earlier posts for more background ...

Categories

  • .NET
  • .NET nice to have
  • #if DEBUG
  • 15 iunie 2011
  • 15 octombrie 2011
  • 2011
  • abstracta
  • action
  • adaugare
  • ajax
  • Amsterdam
  • Android
  • aplicatii
  • App Fabric
  • Apple iSlate
  • array
  • as
  • ASP.NET
  • AsReadOnly
  • Assembly comun
  • async
  • Asynchronous programming
  • asyncron
  • Autofac
  • AutoMapper
  • az
  • Azure
  • Azure AppFabric Cache
  • Azure backup solution
  • Azure Storage Explorer
  • azure. cloud
  • backup
  • BCP utility
  • bing maps v7
  • BitArray
  • BlackBerry
  • blob
  • BlobContainerPublicAccessType
  • breakpoint
  • bucuresti
  • C#
  • cache
  • CallerMemberName
  • CellCast
  • Certificate
  • CES
  • change
  • ChannelFactory
  • clasa
  • classinitialize
  • clean code
  • click event
  • close
  • Cloud
  • Cluj
  • cluj-napoca
  • Code contracts
  • code retrat
  • codecamp
  • CollectionAssert
  • Compact Edition
  • compara
  • Comparer T .Default
  • CompareTo
  • comparison
  • comunitate
  • concurs
  • Conditional attribute
  • configurare
  • connection string
  • container
  • content type
  • control
  • Convert
  • convertAll
  • convertor
  • cross platform
  • CRUD
  • css
  • custom properties
  • custom request
  • DACPAC
  • Daniel Andres
  • data sync service
  • database
  • date time
  • datetime
  • debug
  • default
  • delegate
  • dependency injection
  • deploy
  • DeploymentItem
  • design patterns
  • Dev de Amsterdam
  • development stoage
  • dictionary
  • diferente
  • digging
  • director
  • Directory.Exist
  • disable
  • dispatcher
  • dispose
  • dropdown
  • dynamic
  • EF
  • email
  • encoding
  • entity framework
  • enum
  • enumerable
  • Environment.NewLine
  • error
  • error 404
  • error handling
  • eveniment
  • event
  • ews
  • excel
  • exception
  • exchange
  • exita
  • explicit
  • export
  • extension
  • field
  • File.Exist
  • finalize
  • fire and forget
  • Fluent interface pattern
  • format
  • func
  • GC.SuppressFinalize
  • generic
  • getdirectoryname
  • globalization
  • gmail
  • hackathon
  • Hadoop
  • handle
  • HTML
  • html 5
  • Html.ActionLink
  • http://www.blogger.com/img/blank.gif
  • HttpModule
  • IComparable
  • IE
  • ienumerable
  • IIS
  • image
  • implicit
  • import
  • int
  • internationalization
  • Internet Explorer
  • interop
  • Ioc
  • IP Filter
  • iPhone
  • iQuest
  • IStructuralEquatable
  • ITCamp
  • itspark
  • java script
  • javascript
  • July 2012
  • KeyedByTypeCollection
  • KeyNotFoundException
  • Kinect SDK
  • lambda expression
  • LightSwitch Microsoft Silverlight
  • linq
  • list
  • lista
  • lista servicii
  • liste
  • Live Connect
  • Live ID
  • load
  • localization
  • lock
  • m-learning
  • MAC
  • Mango
  • map
  • mapare
  • mapare propietati
  • messagequeue
  • meta properties
  • method
  • MethodImpl
  • Metro App
  • Microsoft
  • Microsoft Sync Framework
  • mlearning
  • mlearning devices
  • Mobile Apps
  • mobile in the cloud
  • mobile learning
  • mobile services
  • Mobile Web
  • mongoDb
  • monitorizare
  • msmq
  • multitasking
  • MVC
  • MVC 3
  • MVVM
  • namespace
  • nextpartitionkey
  • nextrowkey
  • Ninject
  • nivel acces
  • no result
  • normalize
  • nosql
  • null expcetion
  • null object pattern
  • NullReferenceException
  • OAuth API
  • office
  • offline
  • Open ID
  • openhackeu2011
  • operations
  • operator
  • optimization
  • option
  • outputcache
  • OutputCacheProvider
  • override
  • paginare
  • pagination
  • path
  • persistare
  • Portable Library tool
  • Post event – CodeCamp Cluj-Napoca
  • predicate
  • predictions
  • prezentare
  • process
  • proiect
  • property
  • propietati
  • query
  • ReadOnlyCollection
  • ReadOnlyDictionary
  • referinta
  • reflection
  • remote
  • reply command
  • request
  • request response
  • resouce
  • REST
  • REST Client
  • RESTSharp
  • ronua
  • rss
  • rulare
  • salvare in fisier
  • sc
  • schimbare timp
  • select
  • select nodes
  • send
  • serializare
  • serialization
  • Server.Transfer. Resposen.Redirect
  • service bus
  • ServiceBase
  • servicecontroller
  • sesiune
  • session
  • Session_End
  • Session_Start
  • setup
  • Sibiu
  • signalR
  • Silverlight
  • sincronizare
  • Single Responsibility Principle
  • SkyDrive
  • skype
  • smartphones
  • smtp
  • Snapguide
  • sniffer
  • socket
  • solid
  • spec#
  • sql
  • Sql Azure
  • SQL CE
  • sql server 2008 RC
  • SRP
  • startuptype
  • stateful
  • stateless
  • static
  • stergere
  • store
  • store procedure
  • stream
  • string
  • string.join
  • struct
  • StructuralEqualityComparer
  • submit
  • switch
  • Symbian
  • Synchronized
  • system
  • tabele
  • table
  • techEd 2012
  • tempdata
  • test
  • testcleanup
  • testinitialize
  • testmethod
  • thread
  • timer
  • ToLower
  • tool
  • tostring
  • Total Cost Calculator
  • trace ASP.NET
  • transcoding
  • tuplu
  • tutorial
  • TWmLearning
  • type
  • unit test
  • unittest
  • UrlParameter.Optional
  • Validate
  • validation
  • verificare
  • video
  • view
  • ViewBag
  • virtual
  • visual studio
  • VM role
  • Vunvulea Radu
  • wallpaper
  • WCF
  • WebBrower
  • WebRequest
  • where clause
  • Windows
  • windows 8
  • Windows Azure
  • Windows Azure Service Management CmdLets
  • windows live messenger
  • Windows Mobile
  • Windows Phone
  • windows service
  • windows store application
  • Windows Task
  • WinRT
  • word
  • workaround
  • XBox
  • xml
  • xmlns
  • XNA
  • xpath
  • YMesseger
  • Yonder
  • Zip

Blog Archive

  • ►  2013 (139)
    • ►  November (17)
    • ►  October (12)
    • ►  September (10)
    • ►  August (7)
    • ►  July (8)
    • ►  June (15)
    • ►  May (12)
    • ►  April (17)
    • ►  March (16)
    • ►  February (9)
    • ►  January (16)
  • ►  2012 (251)
    • ►  December (9)
    • ►  November (19)
    • ►  October (26)
    • ►  September (13)
    • ►  August (35)
    • ►  July (28)
    • ►  June (27)
    • ►  May (24)
    • ►  April (18)
    • ►  March (17)
    • ►  February (20)
    • ►  January (15)
  • ▼  2011 (127)
    • ►  December (11)
    • ►  November (20)
    • ►  October (8)
    • ►  September (8)
    • ►  August (8)
    • ►  July (10)
    • ▼  June (5)
      • Care este cel mai rapid mod prin care putem consum...
      • How to lock a method - synchronized
      • Fluent interface pattern
      • Fields vs properties
      • Dispose and finalize
    • ►  May (8)
    • ►  April (9)
    • ►  March (14)
    • ►  February (20)
    • ►  January (6)
  • ►  2010 (26)
    • ►  December (1)
    • ►  November (1)
    • ►  October (1)
    • ►  June (2)
    • ►  May (1)
    • ►  April (4)
    • ►  March (1)
    • ►  February (1)
    • ►  January (14)
Powered by Blogger.

About Me

Unknown
View my complete profile