WCF and objects with events

Hot Topic

CR's MOST WANTED/HIDDEN/ARCHIVE/READONLY FILE: CrystalImageHandler.aspx in VS 2005 RC1
XI and VS 2005
Refreshing PLKs
Animate a DrawingVisual
Two-way binding with custom control
An Existing Connection Was Forceably Closed by the Remote Host
Problem of Office add-in (C#)
Simple element Drag'n Drop example in WBA
WPF/XAML for WinXP
its no longer possible to use a 'different' build configuration

Visual Studio

DSL using languages
ReportViewer data binding (NOT design time) in ASP.Net, please help
VS SDK March 2006 CTP
Any option to find Track Revisions - Reject Insertion
how to handle NullReferenceException
Excel COM addin parameter limit?
An explicit conversion exists
Unable to create Excel Workbook Project
Sorting list object with protection on
API for browsing VS 2005 "Track Changes" (yellow/green editor margin)

WCF and objects with events

I have a class witch implements INotifyPropertyChanged. How do I send that through WCF

When eventhandlers are hooked I get:

“Error while trying to serialize parameter http://tempuri.org/:customer. Type 'System.Windows.PropertyChangedEventManager' has neither Serializable attribute nor DataContract attribute”

Best regards,

Thomas Andersen

Answer this question

WCF and objects with events

  • raj more

    WCF sends only data part of the class. In order to send a class through WCF the class must have either DataContract or Serializable attribute. (You can find more information about WCF serialization programming model here)

    The recommended practice in Service Oriented Architecture is to define the data you want to send as DataContract and keep the eventing behavior local. Translated in plain english, you need to mark only the data members (and not events) with DataMember attribute.

    You could use the class with events on both sides and thus get the eventing behavior. However the events are not sent across.

    I hope this helps.



  • Steve of Easyget.biz

    The class is marked Serializable, but I can't mark the event NonSerialized

    "Error 21 Attribute 'NonSerialized' is not valid on this declaration type. It is valid on 'field' declarations only."

    Does this mean I have to change to DataContract and then mark all the DataMembers

     

    BTW, if I remove the "event" keyword I can mark it "NonSerialized", but then it doesn't implement INotifyPropertyChanged witch I need for WPF databinding.

     

    Best regards,
      Thomas S. Andersen

     

  • Aengus O

    The recommendation is to mark your class [DataContract] and mark each serializable member as [DataMember]. This way you do not end up accidentally remoting data (such as the event) that are local.

  • WCF and objects with events
Answer this question