WCF 3.5 SP1 allows for circular references without adding any code
WCF now provides a way to avoid circular reference problems on serialization, which before required you to initialize the Data Contract Serializer with a KeepReferences setting. Another option was to cheat and use a NetDataContractSerializer which wasn’t easier without cusotm behaviors or special code, now it is as simple as adding an attribute.
Here is one such exception you may receive if you are having issues:
“Object Graph for Type X Contains Cycles and
Cannot be Serialized if Reference Tracking is Disabled”
Example that will work wonders without anything else required.
[DataContract(IsReference = true)]
public class Person
{
[DataMember]
public string Name
{ get; set; }
[DataMember]
public string Address
{ get; set; }
[DataMember]
public List<Person> Children
{ get; set; }
}
Now it works, Another example more appropriate is using eXtensible Access Control Markup Language (XACML) specification.
[DataContract(IsReference = true)]
public class PolicySet
{
[DataMember]
public string Name
{ get; set; }
[DataMember]
public List<PolicySet> PolicySets
{ get; set; }
[DataMember]
public List<PolicySet> ParentPolicySet
{ get; set; }
}
[DataContract(IsReference = true)]
public class Policy
{
[DataMember]
public string Name
{ get; set; }
[DataMember]
public PolicySet ParentPolicySet
{ get; set; }
[DataMember]
public List<Rule> Rules
{ get; set; }
}
[DataContract(IsReference = true)]
public class Rule
{
[DataMember]
public string Name
{ get; set; }
[DataMember]
public Policy ParentPolicy
{ get; set; }
[DataMember]
public List<Targets> Targets
{ get; set; }
}
Comments
One Comment on WCF 3.5 SP1 allows for circular references without adding any code
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Matteo Migliore - Solution architect - Corsi .NET - Consulente .NET on
Wed, 7th Apr 2010 4:54 am
Serializzazione: WCF perch…
Serializzazione: WCF perch…
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