.NET 4.5中的序列化中断

Question

我们有一个只在.NET 4.5中发生的序列化问题 - 相同的代码在.NET 4中工作正常.我们尝试使用几个字段序列化一个继承的类型,基类和继承类都标记为SerializableAttribute.我们在Web服务的客户端获得一个异常,说服务器中有一个MethodAccessException,服务器本身不会抛出任何异常,这似乎是客户端序列化过程中的一个问题.重要的是要注意我们在.NET 4-而不是.4.5中进行编译

更新:实现ISerailize并忽略"Value"属性后,程序运行正常,但这意味着我们不得不放弃序列化此字段.

非常感激任何的帮助.谢谢,奥梅尔

例外细节:

System.Web.Services.Protocols.SoapException occurred
  HResult=-2146233087
  Message=System.Web.Services.Protocols.SoapException: Server was unable to process request. ---> System.InvalidOperationException: There was an error generating the XML document. ---> System.MethodAccessException: Attempt by method 'Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriter1.Write88_DeviceSiteTypeInfo(System.String, System.String, IOSIGHT.Info.DeviceSiteTypeInfo, Boolean, Boolean)' to access method 'IOSIGHT.Info.DeviceSiteTypeInfo.get_Value()' failed.
   at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriter1.Write88_DeviceSiteTypeInfo(String n, String ns, DeviceSiteTypeInfo o, Boolean isNullable, Boolean needType)
   at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriter1.Write1310_GetSiteTypesResponse(Object[] p)
   at Microsoft.Xml.Serialization.GeneratedAssembly.ArrayOfObjectSerializer2089.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 ---
  Source=System.Web.Services
  Actor=""
  Lang=""
  Node=""
  Role=""
  StackTrace:
       at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
       at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
       at IOSIGHT.BLL.localhost.IOSightWS.GetSiteTypes() in C:\IOSIGHT\Common\IOSight.BLL\Web References\localhost\Reference.cs:line 25019
       at IOSIGHT.BLL.TypeBankBLL.GetSiteTypes() in C:\IOSIGHT\Common\IOSight.BLL\Entities\TypeBanksBLL.cs:line 477
  InnerException: 

附件是基类和继承类代码: Base:

[Serializable()]
public class TypeBankInfo
{


    #region "Fields"
    private int _id = 0;
    private string _Name = string.Empty;
    private string _description = string.Empty;
    private object _value = null;

    #endregion

    #region "Constructors"
    public TypeBankInfo()
    {
    }

    public TypeBankInfo(int ID, string name)
        : this()
    {
        this._id = ID;
        this.Name = name;
    }

    public TypeBankInfo(int ID, string name, string description)
        : this(ID, name)
    {
        this._description = description;
        this._value = Value;
    }

    public TypeBankInfo(int ID, string name, string description, object value)
        : this(ID, name, description)
    {
        this._value = value;
    }

    #endregion

    #region "Properties"
    public virtual string Name
    {
        get
        {
            return this._Name;
        }
        set
        {
            this._Name = value;
        }
    }

    public virtual string Description
    {
        get
        {
            return _description;
        }
        set
        {
            _description = value;
        }
    }

    public virtual int ID
    {
        get
        {
            return _id;
        }
        set
        {
            _id = int.Parse(value.ToString());
        }
    }


    public virtual object @Value
    {
        get
        {
            return this._value;
        }
        set
        {
            this._value = value;
        }
    }

    #endregion

}

Intheried:

[Serializable()]
public class DeviceSiteTypeInfo : TypeBankInfo, ISerializable
{


    #region "Fields"
    private EntityTypeEnum _entitytype = EntityTypeEnum.Site;
    private DeviceIOTemplateInfo[] _IOTemplates;
    private CaptionInfo[] _Captions;
    private int _parentClassID;
    #endregion

    #region "Constructors"
    public DeviceSiteTypeInfo()
    {
    }

    public DeviceSiteTypeInfo(int id, string name)
        : base(id, name)
    {
    }

    public DeviceSiteTypeInfo(int id, string name, string description)
        : base(id, name, description)
    {
    }

    // The special constructor is used to deserialize values. 
    public DeviceSiteTypeInfo(SerializationInfo info, StreamingContext context)
    {
        //parent  fields
        ID = (int)info.GetValue("_id", typeof(int));
        Name = (string)info.GetValue("_Name", typeof(string));
        Description = (string)info.GetValue("_description", typeof(string));


        //my fields
        _entitytype = (EntityTypeEnum)info.GetValue("_entitytype", typeof(EntityTypeEnum));
        _IOTemplates = (DeviceIOTemplateInfo[])info.GetValue("_IOTemplates", typeof(DeviceIOTemplateInfo[]));
        _Captions = (CaptionInfo[])info.GetValue("_Captions", typeof(CaptionInfo[]));
        _parentClassID = (int)info.GetValue("_parentClassID", typeof(int));

    }



    #endregion

    #region "Properties"
    public EntityTypeEnum EntityTypeID
    {
        get
        {
            return this._entitytype;
        }
        set
        {
            this._entitytype = value;
        }
    }



    [EditorBrowsable(EditorBrowsableState.Never), Browsable(false), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
    private new object Value
    {
        get
        {
            return base.Value;
        }
        set
        {
            base.Value = value;
        }
    }

    public CaptionInfo[] Captions
    {
        get
        {
            return this._Captions;
        }
        set
        {
            this._Captions = value;
        }
    }

    public DeviceIOTemplateInfo[] IOTemplates
    {
        get
        {
            return this._IOTemplates;
        }
        set
        {
            this._IOTemplates = value;
        }
    }

    public int ParentClassID
    {
        get
        {
            return this._parentClassID;
        }
        set
        {
            this._parentClassID = value;
        }
    }

    #endregion


    #region Methods

   /// <summary>
   /// Called on serialization
   /// </summary>
   /// <param name="info">serialiation info</param>
   /// <param name="context">context</param>
    public void GetObjectData(SerializationInfo info, StreamingContext context)
    {
        // parent fields
        info.AddValue("_id", ID, typeof(int));
        info.AddValue("_Name", Name, typeof(string));
        info.AddValue("_description", Description, typeof(string));

        //my fields
        info.AddValue("_entitytype", _entitytype, typeof(EntityTypeEnum));
        info.AddValue("_IOTemplates", _IOTemplates, typeof(DeviceIOTemplateInfo[]));
        info.AddValue("_Captions", _Captions, typeof(CaptionInfo[]));
        info.AddValue("_parentClassID", _parentClassID, typeof(int));
    }

    #endregion

}

Answer 1

在4.5中,XmlSerializer的实现被替换为不依赖于C#编译器的实现.虽然它提供了更好的启动性能和稳定性,但您可能会遇到实现之间的兼容性问题.您可以尝试将以下内容添加到app.config文件中,看看是否可以解决问题吗？

<configuration>
  <system.xml.serialization>
    <xmlSerializer useLegacySerializerGeneration="true"/>
  </system.xml.serialization>
</configuration>

如果您担心在4.0上运行此工作,则可以尝试在运行时检测框架的版本,并在运行时为4.5或更高时动态更改配置.我写了一篇博客文章,后来解释了如何做到这一点:

http://blogs.msdn.com/b/youssefm/archive/2010/01/21/how-to-change-net-configuration-files-at-runtime-including-for-wcf.aspx

Answer 2

我们希望在即将推出的.NET Framework 4.5更新中解决此问题.一旦更新发布,我将使用下载链接更新帖子.如果您的任务关键型应用程序受到影响,请联系Microsoft dot com的netfx45compat,并急需修复.我可以帮助您找到可以帮助您的请求的Microsoft支持.