I converted entity frmaework to POCO and the resulted classes school , and document looks like
[DataContract] public school { [DataMember] public Nullable<int> DocumentId { get; set; } [DataMember]public virtual Document Document { get; set; } } [DataContract] public Document { [DataMember] public int Id { get; set; } [DataMember] public string ShortString { get; set; } [DataMember] public virtual ICollection<school> Nouns { get; set; } }
I got successfully schools.Include("Document")
if I tried to serialise the resulted list of above using method like
public static string Serialize<T>(T data) { try { using (var memoryStream = new MemoryStream()) { var serializer = new DataContractJsonSerializer(typeof(T)); serializer.WriteObject(memoryStream, data); memoryStream.Seek(0, SeekOrigin.Begin); var reader = new StreamReader(memoryStream); string content = reader.ReadToEnd(); return content; } } catch (System.Exception) { return string.Empty; } }
I get error
Object graph for type 'School' contains cycles and cannot be serialized if reference tracking is disabled.
I cannot solve that by add, becuase it's json serialsing and will raise another error
[DataContract IsReference="true"]