I'm getting this exception when calling my web service. I'm using EF in my service and trying to return a POCO class created by EF. Any ideas??
System.Web.Services.Protocols.SoapException: Server was unable to process request. ---> System.InvalidOperationException: There was an error generating the XML document. ---> System.InvalidOperationException: The type System.Data.Entity.DynamicProxies.Job_3C04107CB03F22888B19EF7537A795C816D03441852DC37A42729E7542384BBE was not expected. Use the XmlInclude or SoapInclude attribute to specify types that are not known statically. at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriter1.Write2_Job(String n, String ns, Job o, Boolean isNullable, Boolean needType) at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriter1.Write9_GetJobByNumberResponse(Object[] p) at Microsoft.Xml.Serialization.GeneratedAssembly.ArrayOfObjectSerializer13.Serialize(Object objectToSerialize, XmlSerializationWriter writer) at System.Xml.Serialization.XmlSerializer.Serialize(XmlWriter xmlWriter, Object o, XmlSerializerNamespaces namespaces, String encodingStyle, String id) --- End of inner exception stack trace --- at System.Xml.Serialization.XmlSerializer.Serialize(XmlWriter xmlWriter, Object o, XmlSerializerNamespaces namespaces, String encodingStyle, String id) at System.Web.Services.Protocols.SoapServerProtocol.WriteReturns(Object[] returnValues, Stream outputStream) at System.Web.Services.Protocols.WebServiceHandler.WriteReturns(Object[] returnValues) at System.Web.Services.Protocols.WebServiceHandler.Invoke() --- End of inner exception stack trace ---
ok i found a post that mentioned setting the ProxyCreationEnabled property to false; Ive done this and now it works fine. Whats the knock on effect of setting this property to false
You need to disable lazy loading and proxy creation on the EF context otherwise your POCO as the exception states is actually a DynamicProxy which cannot be serialised.
This article (archived here) will provide a little more info.