强类型数据集的序列化

Question

有没有人知道一种方法可以使强类型数据集（嘿，我不想使用它们）可序列化，以便我可以使用 AppFabric Server 作为会话状态提供程序来存储它们？我已经使用 InProc Session 状态一段时间了，对此没有任何问题。一旦我将会话状态移到 AppFabric 服务器，我就会遇到一些强类型数据集的问题。我不断收到错误消息，告诉我我的数据集不可序列化。我已经检查过了，它们上面有 Serializable 属性，它们只包含可序列化的数据类型（int、string 等）有什么想法吗？

编辑：这是堆栈跟踪：

System.Runtime.Serialization.SerializationException: The constructor to deserialize an object of type ''DataSetClasses.MyStronglyTypedDataset'' was not found. ---> System.Runtime.Serialization.SerializationException: The constructor to deserialize an object of type ''DataSetClasses.MyStronglyTypedDataset'' was not found. at System.Runtime.Serialization.ObjectManager.GetConstructor(RuntimeType t, RuntimeType[] ctorParams) at System.Runtime.Serialization.ObjectManager.CompleteISerializableObject(Object obj, SerializationInfo info, StreamingContext context) --- End of inner exception stack trace --- at System.Runtime.Serialization.ObjectManager.CompleteISerializableObject(Object obj, SerializationInfo info, StreamingContext context) at System.Runtime.Serialization.ObjectManager.FixupSpecialObject(ObjectHolder holder) at System.Runtime.Serialization.ObjectManager.DoFixups() at System.Runtime.Serialization.Formatters.Binary.ObjectReader.Deserialize(HeaderHandler handler, __BinaryParser serParser, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage) at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize(Stream serializationStream, HeaderHandler handler, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage) at System.Web.Util.AltSerialization.ReadValueFromStream(BinaryReader reader) at System.Web.SessionState.SessionStateItemCollection.ReadValueFromStreamWithAssert() at System.Web.SessionState.SessionStateItemCollection.DeserializeItem(String name, Boolean check) at System.Web.SessionState.SessionStateItemCollection.get_Item(String name) at System.Web.SessionState.HttpSessionStateContainer.get_Item(String name) at System.Web.SessionState.HttpSessionState.get_Item(String name) at appt.T2SharedLibrarySetup.btnSave_Click(Object sender, EventArgs e) in D:\Application\ProblemFile.aspx.vb:line 331 at System.Web.UI.WebControls.Button.OnClick(EventArgs e) at System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) at System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) at System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) at System.Web.UI.Page.RaisePostBackEvent

Answer 1

先尝试将对象序列化/反序列化为字节数组，然后再尝试将其放入会话（然后再放入 AppFabric）。这是一个例子。

        private static BinaryFormatter formatter = null;

    private static Byte[] Serialize(object entity)
    {
        Logger.LogDebug(Category.Cache, "Serializing");
        Byte[] bytes;
        if (formatter == null) formatter = new BinaryFormatter();
        using (MemoryStream stream = new MemoryStream())
        {
            formatter.Serialize(stream, entity);
            bytes = stream.ToArray();
        }
        return bytes;
    }

    private static object DeSerialize(Byte[] bytes)
    {
        #region Sanitation
        if (bytes == null) { throw new System.ArgumentNullException("bytes"); }
        #endregion
        Logger.LogDebug(Category.Cache, "DeSerializing");
        object obj;
        if (formatter == null) formatter = new BinaryFormatter();
        using (MemoryStream stream = new MemoryStream(bytes))
        {
            obj = formatter.Deserialize(stream);
        }
        return obj;
    }

在您从反序列化器中取回对象后，尝试将其转换回您的类型化数据集类型。

Answer 2

您可以使用 DataSet.ReadXML() 或 WriteXML() 函数来实现所需的功能。