.net带事件的对象BinaryFormatter 序列化失败

现有一个对象（objectA）需要用BinaryFormatter序列化成二进制文件：

FileStream fileStream = new FileStream(path, FileMode.Create);



BinaryFormatter formatter = new BinaryFormatter();



formatter.Serialize(fileStream, objectA);

 

对象objectA的定义如下:

 [Serializable()]

    public class ObjectA

    {

        public string Name

        { set; get; }

       public event EventHandler<EventArgs> Created;



    }

 

注意：对象ObjectA有一个事件：Created.

如果在不能被序列化的对象（譬如WinForm里面）订阅了ObjectA的Created事件，那么在序列化时，就会出错：

对此，我并没有找到很好的解释，就连微软的官方文档里面也只字未提（还是我没有看懂）。

http://msdn.microsoft.com/zh-cn/library/system.runtime.serialization.formatters.binary.binaryformatter(v=vs.100).aspx

 给出完整代码：

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.Runtime.Serialization.Formatters.Binary;

using System.IO;



namespace BinarySerializer

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}



private void button1_Click(object sender, EventArgs e)

{

SaveFileDialog dialog = new SaveFileDialog();

if (dialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)

{

try

{

ObjectA objectA = new ObjectA { Name = "A" };

if (checkBox1.Checked)

objectA.Created += new EventHandler<EventArgs>(objectA_Created);//对象在被序列化时，如果对象的事件被其他对象订阅了，则会出现序列化失败错误，将这句注销就序列化成功。

string path = dialog.FileName;

FileStream fileStream = new FileStream(path, FileMode.Create);

BinaryFormatter formatter = new BinaryFormatter();

formatter.Serialize(fileStream, objectA);

MessageBox.Show("保存成功");

}

catch (Exception ex)

{

MessageBox.Show(ex.Message);

}

}

}



void objectA_Created(object sender, EventArgs e)

{

throw new NotImplementedException();

}

}



[Serializable()]

public class ObjectA

{

public string Name

{ set; get; }

public event EventHandler<EventArgs> Created;



}

}

 

Demo: 带事件的对象序列化失败Demo



解决方案:

在事件上加“  [field: NonSerialized]”标签，就不会再序列化事件了。

http://www.baryudin.com/blog/events-and-binaryformatter-serialization-net.html

http://stackoverflow.com/questions/2308620/why-is-binaryformatter-trying-to-serialize-an-event-on-a-serializable-class