Re: Error : Cannot serialize member

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From: Jan Tielens (jan_at_no.spam.please.leadit.be)
Date: 04/26/04 

Date: Mon, 26 Apr 2004 22:18:36 +0200

Probably have a return value or parameter of the Site type. This class
cannot be serialized so it can not be used as a return value of parameter of
a web service. 

-- 
Greetz,
Jan
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>
> Server Error in '/IISManage' Application.
> --------------------------------------------------------------------------
--
> ----
>
> Cannot serialize member System.ComponentModel.Component.Site of type
> System.ComponentModel.ISite because it is an interface.
> Description: An unhandled exception occurred during the execution of the
> current web request. Please review the stack trace for more information
> about the error and where it originated in the code.
>
> Exception Details: System.NotSupportedException: Cannot serialize member
> System.ComponentModel.Component.Site of type System.ComponentModel.ISite
> because it is an interface.
>
> Source Error:
>
>       An unhandled exception was generated during the execution of the
> current web request. Information regarding the origin and location of the
> exception can be identified using the exception stack trace below.
>
> Stack Trace:
>
> [NotSupportedException: Cannot serialize member
> System.ComponentModel.Component.Site of type System.ComponentModel.ISite
> because it is an interface.]
>    System.Xml.Serialization.TypeScope.ImportTypeDesc(Type type, Boolean
> canBePrimitive, MemberInfo memberInfo)
>    System.Xml.Serialization.TypeScope.GetTypeDesc(Type type, MemberInfo
> source, Boolean directReference)
>    System.Xml.Serialization.TypeScope.GetTypeDesc(Type type, MemberInfo
> source)
>    System.Xml.Serialization.StructModel.GetPropertyModel(PropertyInfo
> propertyInfo)
>    System.Xml.Serialization.StructModel.GetFieldModel(MemberInfo
memberInfo)
>
>
System.Xml.Serialization.XmlReflectionImporter.ImportStructLikeMapping(Struc
> tModel model, String ns)
>
>
System.Xml.Serialization.XmlReflectionImporter.ImportStructLikeMapping(Struc
> tModel model, String ns)
>
> System.Xml.Serialization.XmlReflectionImporter.ImportTypeMapping(TypeModel
> model, String ns, ImportContext context, String dataType, Boolean repeats)
>
> [InvalidOperationException: There was an error reflecting type
> 'System.DirectoryServices.DirectoryEntry'.]
>
> System.Xml.Serialization.XmlReflectionImporter.ImportTypeMapping(TypeModel
> model, String ns, ImportContext context, String dataType, Boolean repeats)
>
> System.Xml.Serialization.XmlReflectionImporter.ImportTypeMapping(TypeModel
> model, String ns, ImportContext context, String dataType)
>
>
System.Xml.Serialization.XmlReflectionImporter.ImportAccessorMapping(MemberM
> apping accessor, FieldModel model, XmlAttributes a, String ns, Type
> choiceIdentifierType)
>
>
System.Xml.Serialization.XmlReflectionImporter.ImportMemberMapping(XmlReflec
> tionMember xmlReflectionMember, String ns, XmlReflectionMember[]
> xmlReflectionMembers)
>
>
System.Xml.Serialization.XmlReflectionImporter.ImportMembersMapping(XmlRefle
> ctionMember[] xmlReflectionMembers, String ns, Boolean hasWrapperElement)
>
> [InvalidOperationException: There was an error reflecting 'objObject'.]
>
>
System.Xml.Serialization.XmlReflectionImporter.ImportMembersMapping(XmlRefle
> ctionMember[] xmlReflectionMembers, String ns, Boolean hasWrapperElement)
>
> System.Xml.Serialization.XmlReflectionImporter.ImportMembersMapping(String
> elementName, String ns, XmlReflectionMember[] members, Boolean
> hasWrapperElement)
>
>
System.Web.Services.Protocols.SoapReflector.ImportMembersMapping(XmlReflecti
> onImporter xmlImporter, SoapReflectionImporter soapImporter, Boolean
> serviceDefaultIsEncoded, Boolean rpc, SoapBindingUse use,
SoapParameterStyle
> paramStyle, String elementName, String elementNamespace, Boolean
> nsIsDefault, XmlReflectionMember[] members, Boolean validate)
>
>
System.Web.Services.Protocols.SoapReflector.ReflectMethod(LogicalMethodInfo
> methodInfo, Boolean client, XmlReflectionImporter xmlImporter,
> SoapReflectionImporter soapImporter, String defaultNs)
>
> [InvalidOperationException: Method Service1.displayshildren can not be
> reflected.]
>
>
System.Web.Services.Protocols.SoapReflector.ReflectMethod(LogicalMethodInfo
> methodInfo, Boolean client, XmlReflectionImporter xmlImporter,
> SoapReflectionImporter soapImporter, String defaultNs)
>    System.Web.Services.Description.SoapProtocolReflector.ReflectMethod()
>
>
System.Web.Services.Description.ProtocolReflector.ReflectBinding(ReflectedBi
> nding reflectedBinding)
>    System.Web.Services.Description.ProtocolReflector.Reflect()
>
>
System.Web.Services.Description.ServiceDescriptionReflector.ReflectInternal(
> ProtocolReflector[] reflectors)
>
System.Web.Services.Description.ServiceDescriptionReflector.Reflect(Type
> type, String url)
>    System.Web.Services.Protocols.DocumentationServerType..ctor(Type type,
> String uri)
>    System.Web.Services.Protocols.DocumentationServerProtocol.Initialize()
>    System.Web.Services.Protocols.ServerProtocol.SetContext(Type type,
> HttpContext context, HttpRequest request, HttpResponse response)
>    System.Web.Services.Protocols.ServerProtocolFactory.Create(Type type,
> HttpContext context, HttpRequest request, HttpResponse response, Boolean&
> abortProcessing)
>
> [InvalidOperationException: Unable to handle request.]
>    System.Web.Services.Protocols.ServerProtocolFactory.Create(Type type,
> HttpContext context, HttpRequest request, HttpResponse response, Boolean&
> abortProcessing)
>
> System.Web.Services.Protocols.WebServiceHandlerFactory.CoreGetHandler(Type
> type, HttpContext context, HttpRequest request, HttpResponse response)
>
> [InvalidOperationException: Failed to handle request.]
>
> System.Web.Services.Protocols.WebServiceHandlerFactory.CoreGetHandler(Type
> type, HttpContext context, HttpRequest request, HttpResponse response)
>
>
System.Web.Services.Protocols.WebServiceHandlerFactory.GetHandler(HttpContex
> t context, String verb, String url, String filePath)
>    System.Web.HttpApplication.MapHttpHandler(HttpContext context, String
> requestType, String path, String pathTranslated, Boolean useAppConfig)
+699
>
>
System.Web.MapHandlerExecutionStep.System.Web.HttpApplication+IExecutionStep
> .Execute() +95
>    System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean&
> completedSynchronously) +173
>
>
>
> We encounter that problem when i am running my service with this code
>
>
>
> Imports System.Web.Services
>
> <System.Web.Services.WebService(Namespace :=
> "http://tempuri.org/IISManage/Service1")> _
>
> Public Class Service1
>
> ' WEB SERVICE EXAMPLE
>
> ' The HelloWorld() example service returns the string Hello World.
>
> ' To build, uncomment the following lines then save and build the project.
>
> ' To test this web service, ensure that the .asmx file is the start page
>
> ' and press F5.
>
> '
>
> '<WebMethod()> _
>
> 'Public Function HelloWorld() As String
>
> ' Return "Hello World"
>
> 'End Function
>
> <WebMethod()> _
>
> Public Sub displayshildren(ByVal objObject As
> DirectoryServices.DirectoryEntry, ByVal strSpaces As String)
>
> Console.WriteLine(strSpaces & objObject.Name)
>
> Dim objChild As DirectoryServices.DirectoryEntry
>
> For Each objChild In objObject.Children
>
> displayshildren(objChild, strSpaces & " ")
>
> Next
>
> End Sub
>
> <WebMethod()> _
>
> Public Function returnSite(ByVal objObject As
> System.DirectoryServices.DirectoryEntry) As String
>
> 'Dim SiteArr(0) As String
>
> Dim SiteArr As String
>
> Dim objChild As DirectoryServices.DirectoryEntry
>
> For Each objChild In objObject.Children
>
> SiteArr = objChild.Name
>
> Next
>
> Return SiteArr
>
> End Function
>
> End Class
>
>
>
> --Can any one give me a solution to that.?
>
>

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