我们在.NET 4.5中出现了序列化问题，而相同的代码在.NET 4中运行良好。我们正在尝试对继承类型进行序列化，基类和派生类都带有 SerializableAttribute 标记。在 Web 服务的客户端方面，我们收到了一个 异常，指示服务器上发生了 MethodAccessException ，而服务器本身并未抛出任何异常，似乎是客户端序列化过程中出现了问题。
值得注意的是，我们正在使用 .NET 4 进行编译，而非 .NET 4.5。
更新：实现了 ISerailize 并忽略了“Value”属性后，程序确实成功运行了，但这意味着我们不得不放弃序列化此字段。
非常感谢您提供任何帮助。 谢谢， Omer 异常详情：
更新：实现了 ISerailize 并忽略了“Value”属性后，程序确实成功运行了，但这意味着我们不得不放弃序列化此字段。
非常感谢您提供任何帮助。 谢谢， Omer 异常详情：
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:
以下是基类和派生类的代码： 基类:
[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
}
Inherited:
[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
}