我如何解决这个错误，“尝试反序列化参数时出错"? [英] How do I solve this error, "error while trying to deserialize parameter"

问题描述

我有一个 Web 服务，它在一个环境中运行良好，但在另一个环境中却没有.

I have a web service that is working fine in one environment but not in another.

Web 服务从 SharePoint 获取文档元数据，它在我无法调试的服务器上运行，但通过日志记录我确认该方法成功进入和退出.

The web service gets document meta data from SharePoint, it running on a server where I cant debug but with logging I confirmed that the method enters and exits successfully.

错误的原因可能是什么?

What could be the reason for the errors?

错误信息是，

The formatter threw an exception while trying to deserialize the message: 

There was an error while trying to deserialize parameter http://CompanyName.com.au/ProjectName:GetDocumentMetaDataResponse. 

The InnerException message was 'Error in line 1 position 388. 'Element' 'CustomFields' from namespace 'http://CompanyName.com.au/ProjectName' is not expected. 

Expecting element 'Id'.'.  Please see InnerException for more details.

InnerException 是

The InnerException was

System.ServiceModel.Dispatcher.NetDispatcherFaultException 被捕获Message="格式化程序在尝试反序列化消息时抛出异常:尝试反序列化参数 http://CompanyName.com.au/ProjectName:GetDocumentMetaDataResponse.

System.ServiceModel.Dispatcher.NetDispatcherFaultException was caught Message="The formatter threw an exception while trying to deserialize the message: There was an error while trying to deserialize parameter http://CompanyName.com.au/ProjectName:GetDocumentMetaDataResponse.

InnerException 消息是

The InnerException message was

'Error in line 1 position 388. 
'Element' 'CustomFields' 
from namespace 'http://CompanyName.com.au/ProjectName' is not expected. 
Expecting element 'Id'.'.  Please see InnerException for more details."



  Source="mscorlib"
  Action="http://schemas.microsoft.com/net/2005/12/windowscommunicationfoundation/dispatcher/fault"
  StackTrace:
    Server stack trace: 
       at System.ServiceModel.Dispatcher.DataContractSerializerOperationFormatter.DeserializeParameterPart(XmlDictionaryReader reader, PartInfo part, Boolean isRequest)
       at System.ServiceModel.Dispatcher.DataContractSerializerOperationFormatter.DeserializeParameter(XmlDictionaryReader reader, PartInfo part, Boolean isRequest)
       at System.ServiceModel.Dispatcher.DataContractSerializerOperationFormatter.DeserializeParameters(XmlDictionaryReader reader, PartInfo[] parts, Object[] parameters, Boolean isRequest)
       at System.ServiceModel.Dispatcher.DataContractSerializerOperationFormatter.DeserializeBody(XmlDictionaryReader reader, MessageVersion version, String action, MessageDescription messageDescription, Object[] parameters, Boolean isRequest)
       at System.ServiceModel.Dispatcher.OperationFormatter.DeserializeBodyContents(Message message, Object[] parameters, Boolean isRequest)
       at System.ServiceModel.Dispatcher.OperationFormatter.DeserializeReply(Message message, Object[] parameters)
       at System.ServiceModel.Dispatcher.ProxyOperationRuntime.AfterReply(ProxyRpc& rpc)
       at System.ServiceModel.Channels.ServiceChannel.HandleReply(ProxyOperationRuntime operation, ProxyRpc& rpc)
       at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
       at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs)
       at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
       at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)
    Exception rethrown at [0]: 
       at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
       at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
       at CompanyName.ProjectName.External.Sharepoint.WebServiceProxies.SharepointProjectNameSiteService.ProjectNameSiteSoap.GetDocumentMetaData(GetDocumentMetaDataRequest request)
       at CompanyName.ProjectName.External.Sharepoint.WebServiceProxies.SharepointProjectNameSiteService.ProjectNameSiteSoapClient.CompanyName.ProjectName.External.Sharepoint.WebServiceProxies.SharepointProjectNameSiteService.ProjectNameSiteSoap.GetDocumentMetaData(GetDocumentMetaDataRequest request) in D:SourceTFSRootProjectName	runkCodeBaseExternalCompanyName.ProjectName.External.Sharepoint.WebServiceProxiesService ReferencesSharepointProjectNameSiteServiceReference.cs:line 2141
       at CompanyName.ProjectName.External.Sharepoint.WebServiceProxies.SharepointProjectNameSiteService.ProjectNameSiteSoapClient.GetDocumentMetaData(ListSummaryDto listSummary, FileCriteriaDto criteria, List`1 customFields) in D:SourceTFSRootProjectName	runkCodeBaseExternalCompanyName.ProjectName.External.Sharepoint.WebServiceProxiesService ReferencesSharepointProjectNameSiteServiceReference.cs:line 2150
       at CompanyName.ProjectName.Services.Shared.SharepointAdapter.GetDocumentMetaData(ListSummaryDto listSummary, FileCriteriaDto criteria, List`1 customFields) in D:SourceTFSRootProjectName	runkCodeBaseServicesCompanyName.ProjectName.ServicesSharedSharepointAdapter.cs:line 260
       at CompanyName.ProjectName.Services.Project.ProjectDocumentService.SetSharepointDocumentData(List`1 sourceDocuments) in D:SourceTFSRootProjectName	runkCodeBaseServicesCompanyName.ProjectName.ServicesProjectProjectDocumentService.cs:line 1963
       at CompanyName.ProjectName.Services.Project.ProjectDocumentService.GetProjectConversionDocumentsImplementation(Int32 projectId) in D:SourceTFSRootProjectName	runkCodeBaseServicesCompanyName.ProjectName.ServicesProjectProjectDocumentService.cs:line 3212
  InnerException: System.Runtime.Serialization.SerializationException
       Message="Error in line 1 position 388. 'Element' 'CustomFields' from namespace 'http://CompanyName.com.au/ProjectName' is not expected. Expecting element 'Id'."
       Source="System.Runtime.Serialization"
       StackTrace:
            at System.Runtime.Serialization.XmlObjectSerializerReadContext.ThrowRequiredMemberMissingException(XmlReaderDelegator xmlReader, Int32 memberIndex, Int32 requiredIndex, XmlDictionaryString[] memberNames)
            at System.Runtime.Serialization.XmlObjectSerializerReadContext.GetMemberIndexWithRequiredMembers(XmlReaderDelegator xmlReader, XmlDictionaryString[] memberNames, XmlDictionaryString[] memberNamespaces, Int32 memberIndex, Int32 requiredIndex, ExtensionDataObject extensionData)
            at ReadFileMetaDataDtoFromXml(XmlReaderDelegator , XmlObjectSerializerReadContext , XmlDictionaryString[] , XmlDictionaryString[] )
            at System.Runtime.Serialization.ClassDataContract.ReadXmlValue(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context)
            at System.Runtime.Serialization.XmlObjectSerializerReadContext.ReadDataContractValue(DataContract dataContract, XmlReaderDelegator reader)
            at System.Runtime.Serialization.XmlObjectSerializerReadContext.InternalDeserialize(XmlReaderDelegator reader, String name, String ns, DataContract& dataContract)
            at System.Runtime.Serialization.XmlObjectSerializerReadContext.InternalDeserialize(XmlReaderDelegator xmlReader, Int32 id, RuntimeTypeHandle declaredTypeHandle, String name, String ns)
            at ReadArrayOfFileMetaDataDtoFromXml(XmlReaderDelegator , XmlObjectSerializerReadContext , XmlDictionaryString , XmlDictionaryString , CollectionDataContract )
            at System.Runtime.Serialization.CollectionDataContract.ReadXmlValue(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context)
            at System.Runtime.Serialization.XmlObjectSerializerReadContext.ReadDataContractValue(DataContract dataContract, XmlReaderDelegator reader)
            at System.Runtime.Serialization.XmlObjectSerializerReadContext.InternalDeserialize(XmlReaderDelegator reader, String name, String ns, DataContract& dataContract)
            at System.Runtime.Serialization.XmlObjectSerializerReadContext.InternalDeserialize(XmlReaderDelegator xmlReader, Int32 id, RuntimeTypeHandle declaredTypeHandle, String name, String ns)
            at ReadMetaDataSearchResultsDtoFromXml(XmlReaderDelegator , XmlObjectSerializerReadContext , XmlDictionaryString[] , XmlDictionaryString[] )
            at System.Runtime.Serialization.ClassDataContract.ReadXmlValue(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context)
            at System.Runtime.Serialization.XmlObjectSerializerReadContext.ReadDataContractValue(DataContract dataContract, XmlReaderDelegator reader)
            at System.Runtime.Serialization.XmlObjectSerializerReadContext.InternalDeserialize(XmlReaderDelegator reader, String name, String ns, DataContract& dataContract)
            at System.Runtime.Serialization.XmlObjectSerializerReadContext.InternalDeserialize(XmlReaderDelegator xmlReader, Int32 id, RuntimeTypeHandle declaredTypeHandle, String name, String ns)
            at ReadGetDocumentMetaDataResponseBodyFromXml(XmlReaderDelegator , XmlObjectSerializerReadContext , XmlDictionaryString[] , XmlDictionaryString[] )
            at System.Runtime.Serialization.ClassDataContract.ReadXmlValue(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context)
            at System.Runtime.Serialization.XmlObjectSerializerReadContext.ReadDataContractValue(DataContract dataContract, XmlReaderDelegator reader)
            at System.Runtime.Serialization.XmlObjectSerializerReadContext.InternalDeserialize(XmlReaderDelegator reader, String name, String ns, DataContract& dataContract)
            at System.Runtime.Serialization.XmlObjectSerializerReadContext.InternalDeserialize(XmlReaderDelegator xmlReader, Type declaredType, DataContract dataContract, String name, String ns)
            at System.Runtime.Serialization.DataContractSerializer.InternalReadObject(XmlReaderDelegator xmlReader, Boolean verifyObjectName)
            at System.Runtime.Serialization.XmlObjectSerializer.ReadObjectHandleExceptions(XmlReaderDelegator reader, Boolean verifyObjectName)
            at System.Runtime.Serialization.DataContractSerializer.ReadObject(XmlDictionaryReader reader, Boolean verifyObjectName)
            at System.ServiceModel.Dispatcher.DataContractSerializerOperationFormatter.DeserializeParameterPart(XmlDictionaryReader reader, PartInfo part, Boolean isRequest)
       InnerException: 

推荐答案

我有一个解决方案，但不确定为什么这会因一种环境而异于另一种环境 - 尽管两种环境之间的一个很大差异是WSS svc pack 1 安装在发生错误的环境中.

I have a solution for this but not sure on the reason why this would be different from one environment to the other - although one big difference between the two environments is WSS svc pack 1 was installed on the environment where the error was occurring.

为了解决这个问题，我从这个链接中得到了一个很好的线索 - http://silverlight.net/forums/t/22787.aspx 即请检查您的服务的Xml Schema"和schema中的顺序按字母顺序排序"

To fix this issue I got a good clue from this link - http://silverlight.net/forums/t/22787.aspx ie to "please check the Xml Schema of your service" and "the sequence in the schema is sorted alphabetically"

查看生成的 wsdl，我注意到对于导致错误的序列化类，该类的属性在 wsdl 中不可见.

Looking at the wsdl generated I noticed that for the serialized class that was causing the error, the properties of this class were not visible in the wsdl.

该类的定义对大多数属性都有私有设置器，但对于 CustomFields 属性没有，即..

The Definition of the class had private setters for most of the properties, but not for CustomFields property ie..

[Serializable]
public class FileMetaDataDto
{
    .
    . a constructor...   etc and several other properties edited for brevity
    . 

    public int Id { get; private set; }
    public string Version { get; private set; }
    public List<MetaDataValueDto> CustomFields { get; set; }

}

从 setter 中删除 private 并重新部署服务，然后再次查看 wsdl，这些属性现在可见，并且原始错误已修复.

On removing private from the setter and redeploying the service then looking at the wsdl again, these properties were now visible, and the original error was fixed.

所以更新前的 wsdl 是

So the wsdl before update was

- <s:complexType name="ArrayOfFileMetaDataDto">
- <s:sequence>
  <s:element minOccurs="0" maxOccurs="unbounded" name="FileMetaDataDto" nillable="true" type="tns:FileMetaDataDto" /> 
  </s:sequence>
  </s:complexType>
- <s:complexType name="FileMetaDataDto">
- <s:sequence>
  <s:element minOccurs="0" maxOccurs="1" name="CustomFields" type="tns:ArrayOfMetaDataValueDto" /> 
  </s:sequence>
  </s:complexType>

更新后的 wsdl 是

The wsdl after update was

- <s:complexType name="ArrayOfFileMetaDataDto">
- <s:sequence>
  <s:element minOccurs="0" maxOccurs="unbounded" name="FileMetaDataDto" nillable="true" type="tns:FileMetaDataDto" /> 
  </s:sequence>
  </s:complexType>
- <s:complexType name="FileMetaDataDto">
- <s:sequence>
  <s:element minOccurs="1" maxOccurs="1" name="Id" type="s:int" /> 
  <s:element minOccurs="0" maxOccurs="1" name="Name" type="s:string" /> 
  <s:element minOccurs="0" maxOccurs="1" name="Title" type="s:string" /> 
  <s:element minOccurs="0" maxOccurs="1" name="ContentType" type="s:string" /> 
  <s:element minOccurs="0" maxOccurs="1" name="Icon" type="s:string" /> 
  <s:element minOccurs="0" maxOccurs="1" name="ModifiedBy" type="s:string" /> 
  <s:element minOccurs="1" maxOccurs="1" name="ModifiedDateTime" type="s:dateTime" /> 
  <s:element minOccurs="1" maxOccurs="1" name="FileSizeBytes" type="s:int" /> 
  <s:element minOccurs="0" maxOccurs="1" name="Url" type="s:string" /> 
  <s:element minOccurs="0" maxOccurs="1" name="RelativeFolderPath" type="s:string" /> 
  <s:element minOccurs="0" maxOccurs="1" name="DisplayVersion" type="s:string" /> 
  <s:element minOccurs="0" maxOccurs="1" name="Version" type="s:string" /> 
  <s:element minOccurs="0" maxOccurs="1" name="CustomFields" type="tns:ArrayOfMetaDataValueDto" /> 
  <s:element minOccurs="0" maxOccurs="1" name="CheckoutBy" type="s:string" /> 
  </s:sequence>
  </s:complexType>

这篇关于我如何解决这个错误，“尝试反序列化参数时出错"?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！