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7.0

Business entity with INotifyPropertyChanged implemented is causing WCF Test Client to throw "Object reference not set to an instance of an Object" exception

Asked by nhhgict in Web Services and WCF, Web Services, WebApplications

I am trying to create a WCF service to manage a specific business entity ie. Add, Update, Delete.

I am using the test client to test the service and all is well until I implement the INotifyPropertyChanged interface on the business entity and fire a property changed notification on one of the properties.

I receive an "Object reference not set to an instance of an Object" exception in the test client at this point.

Is the test client capable of dealing with entities that implement INotifyPropertyChanged or should I not attempt to use the test client in this situation?

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             [DataContract]
    public class DisplayDiscipline :BOBase
    {
        private Discipline _theDiscipline;
        
        private BusinessObjectField<Guid> _id;
 
 
        public DisplayDiscipline()
        {           
            _id = new BusinessObjectField<Guid>(Guid.NewGuid());
             _theDiscipline = new Discipline();
        }
 
        
        [DataMember]
        public Guid Id
        {
            get { return _id.Value; }
            set { _id = new BusinessObjectField<Guid>(value); }
        }        
 
        public void SetDiscipline(Discipline newDiscipline)
        {
            _theDiscipline = newDiscipline;
        }
 
        public Discipline GetDiscipline()
        {
            return _theDiscipline;
        }
 
 
 
        [DataMember]
        public string Description
        {
            get { return _theDiscipline.Description; }
            set 
            { 
                _theDiscipline.Description = value;
                FirePropertyChanged("Description");
            }
        }
 
 
        [DataMember]
        public Boolean OnFramework
        {
            get { return _theDiscipline.OnFramework; }
            set
            {
                _theDiscipline.OnFramework = value;
                FirePropertyChanged("OnFramework");
            }
        }
 
        [DataMember]
        public Boolean Deleted
        {
            get { return _theDiscipline.Deleted; }
            set
            {
                _theDiscipline.Deleted = value;
                FirePropertyChanged("Deleted");
            }
        }
 
        public override void Delete()
        {
            _theDiscipline.Delete();
            base.Delete();
        }
    }
----------------------------------
 
//Method in the service library
//created to test adding a business entity to a list
  public void AddDiscipline(DisplayDiscipline discipline)
        {
            List<DisplayDiscipline> list = new List<DisplayDiscipline>();
 
            list.Add(discipline);
        }

           
         

Business entity with INotifyPropertyChanged implemented is causing WCF Test Client to throw "Object reference not set to an instance of an Object" exception

Asked by nhhgict in Web Services and WCF, Web Services, WebApplications

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