c# - 为什么 BinaryFormatter 试图在可序列化类上序列化事件？

Question

我有一个标记为可序列化的简单类，它恰好有一个事件。我试图将事件成员标记为 NonSerialized，但是编译器提示。然而，当我去序列化类实例时，BinaryFormatter 抛出事件不可序列化的异常。这是否意味着您不能序列化具有事件的类？如果是这样，那么编译器应该预先说明。

Stream file = File.Open("f", FileMode.Open);
BinaryFormatter bf = new BinaryFormatter();

object obj = null;
try
{
    obj = bf.Deserialize(file);
}
catch (System.Runtime.Serialization.SerializationException e)
{
    MessageBox.Show("De-Serialization failed : {0}", e.Message);
}
file.Close();

System.Collections.ArrayList nodeList = obj as System.Collections.ArrayList;

foreach (TreeNode node in nodeList)
{
    treeView.Nodes.Add(node);
}

未能完成以下类(class):

[Serializable()]
class Simple
{
    private int myInt;
    private string myString;
    public event SomeOtherEventDefinedElsewhere TheEvent;

Answer 1

"In the case of events, you must also add the field attribute qualifier when applying the NonSerialized attribute so that the attribute is applied to the underlying delegate rather than to the event itself" Advanced Serialization - MSDN

---

在 NonSerializedAttribute 前加上字段

[field:NonSerialized]
public event MyEventHandler MyEvent;