將HybridDictionary序列化為byte []

Question

我寫了下面的代碼

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）上遇到錯誤，如下所示：

“未將用戶代碼Message =“ Type'System.ComponentModel.ReflectPropertyDescriptor'在程序集'System，版本= 2.0.0.0，區域性=中性，PublicKeyToken = b77a5c561934e089'中未處理System.Runtime.Serialization.SerializationException標記為可序列化。”

這是什么意思 ？

Answer 1

加

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

參加您的活動。 這將忽略它們的序列化。

Answer 2

您應該避免在事件上序列化已注冊的事件處理程序（正如您在上一個答案的注釋中所述，您的對象確實具有事件）。 如果其中一個已注冊的處理程序無法序列化，則該對象將拋出異常。

這個想法源於有關Sanity Free dot org的論壇帖子 。

這是我的實現方式：

    /// <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);
        }
    }

最好的問候，馬塞爾

Answer 3

就像錯誤所述，您的詞典中有System.ComponentModel.ReflectPropertyDescriptor，並且未將其標記為可序列化。