Question

我在下面写了代码

HybridDictionary state = new HybridDictionary();

using (MemoryStream buffer = new MemoryStream())
            {
                BinaryFormatter formatter = new BinaryFormatter();
                formatter.Serialize(buffer , state);


                _backup.Push(buffer .ToArray());

            }

但我在formatter.serialize（st，state）上遇到错误，如下所示：

” 用户代码未处理System.Runtime.Serialization.SerializationException 消息=“在程序集'系统中键入'System.ComponentModel.ReflectPropertyDescriptor'，版本= 2.0.0.0，文化=中立，PublicKeyToken = b77a5c561934e089'未标记为可序列化。”

这是什么意思？

Answer 1

添加

[field:NonSerializedAttribute()]
public event MyEventHandler SomeEvent;

你的活动。这将省略序列化。

Answer 2

您应该避免在事件中序列化已注册的事件处理程序（正如您在上一个答案的注释中所述，您的对象确实有事件）。如果其中一个注册的处理程序不可序列化，那么这将抛出异常。

这个想法来自Forum post on Sanity Free dot org。

以下是我实施此方法的方法：

    /// <summary>
    /// Occurs when a property value changes.
    /// </summary>
    /// <devdoc>Do not serialize this delegate, since we do not want to have
    /// the event listener persisted.</devdoc>
    [NonSerialized]
    private PropertyChangedEventHandler _propertyChanged;

    /// <summary>
    /// Occurs when a property value changes.
    /// </summary>
    /// <remarks>Effectively, this is fired whenever the wrapped MapXtreme theme 
    /// of the AssociatedTheme property gets changed
    /// via the MapXtreme API.</remarks>
    /// <devdoc>The implementation using the public event and the private delegate is
    /// to avoid serializing the (probably non-serializable) listeners to this event.
    /// see http://www.sanity-free.org/113/csharp_binary_serialization_oddities.html
    /// for more information.
    /// </devdoc>
    public event PropertyChangedEventHandler PropertyChanged
    {
        [MethodImpl(MethodImplOptions.Synchronized)]
        add
        {
            _propertyChanged = (PropertyChangedEventHandler)Delegate.Combine(_propertyChanged, value);
        }
        [MethodImpl(MethodImplOptions.Synchronized)]
        remove
        {
            _propertyChanged = (PropertyChangedEventHandler)Delegate.Remove(_propertyChanged, value);
        }
    }

最诚挚的问候，Marcel

Answer 3

正如错误所示，您的字典中有System.ComponentModel.ReflectPropertyDescriptor，并且未标记为可序列化。

将HybridDictionary序列化为byte []

3 个答案: