未标记为可序列化的异常

Question

没有更改代码（我记得）formatter.Serialize 对象类型失败
它适用于测试的其他 5 种类型
我没有对 class（我记得）进行任何更改 - 被标记为可序列化这是一个相当简单的 class 并且不尊重 system.Windows.Documents.FlowDocument

如何找到错误并修复它？

public static T DeepClone<T>(T obj)
{
    using (var ms = new MemoryStream())
    {
        var formatter = new BinaryFormatter();

        try
        {
            formatter.Serialize(ms, obj);
        }
        catch (Exception Ex)
        {
            Debug.WriteLine(Ex.Message);
            Debug.WriteLine(Ex.Source);

'System.Runtime.Serialization.SerializationException' 类型的第一次机会异常发生在 mscorlib.dll

附加信息：程序集 'PresentationFramework, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' 中的类型 'System.Windows.Documents.FlowDocument' 未标记为可序列化。

InnerExeption 为空

我有一些缩小范围的东西，在调用属性之前它起作用了
在调用那个属性之后它失败了
ThisUserGroups 是属性

try
{
    User userclone = DeepClone<User>(CurUser);   // success
}
catch (Exception Ex)
{
    Debug.WriteLine("Before call to CurUser.ThisUserGroups.Count()");
    Debug.WriteLine(Ex.Message);
}
Debug.WriteLine("CurUser.ThisUserGroups.Count()" + " " + CurUser.ThisUserGroups.Count() + " " + CurUser.UserID);
try
{
    User userclone = DeepClone<User>(CurUser);  //failure 
}

问题 class 和属性
省略其他属性和方法
组是可序列化的

[Serializable()]
public class User : Object, INotifyPropertyChanged
{
    [field: NonSerializedAttribute()]
    public event PropertyChangedEventHandler PropertyChanged;
    public void OnPropertyChanged(PropertyChangedEventArgs e)
    {
        if (PropertyChanged != null) PropertyChanged(this, e);
    }
    protected void NotifyPropertyChanged(String info)
    {
        if (PropertyChanged != null)
        {
            PropertyChanged(this, new PropertyChangedEventArgs(info));
        }
    }
    private HashSet<Group> thisUserGroups;
    public HashSet<Group> ThisUserGroups
    {   // after a call to this deepclone fails  
        get
        {
            if (thisUserGroups == null)
            {
                thisUserGroups = new HashSet<Group>();
                foreach (Group g in groupsPlus)  // static all groups in library 14
                {
                    if (!thisUserGroups.Contains(g) && g.ID <= 0) 
                        thisUserGroups.Add(g);
                }
                foreach (UserGroup userGroup in userGroups.OrderBy(x => x.Group.Name))  // docAdmin  fail userGroups == 54 and thisUserGoups is 2
                {                                                                       // docAdminNotGroup success userGroups == 54 and thisUserGoups is 2
                    if (!thisUserGroups.Contains(userGroup.Group) && (IsInRoleDocAdmin || userGroup.UsrID == usrID))
                        thisUserGroups.Add(userGroup.Group);
                }
            }
            return thisUserGroups;   // docAdmin fail thisUserGroups = 14  
        }
    }

    public User(Int16 UsrIDcon, string UserIDcon, string UserInitialsCon, string IPROuserIDcon, string IPROuserPWcon, Int16? FieldGroupID,
                double WindowLeft, double WindowTop, double WindowHeight, double WindowWidth, bool WindowMaximized,
                bool ViewIpro, bool ViewNative, enumSearchDetail? SearchDetail, string ExportPath)
    {
        usrID = UsrIDcon;
        userID = UserIDcon;
        userInitials = UserInitialsCon;
        iPROuserID = IPROuserIDcon;
        iPROuserPW = IPROuserPWcon;
        fieldGroupID = FieldGroupID;
        windowLeft = WindowLeft;
        windowTop = WindowTop;
        windowHeight = WindowHeight;
        windowWidth = WindowWidth;
        windowMaximixed = WindowMaximized;
        viewIpro = ViewIpro;
        viewNative = ViewNative;
        searchDetail = SearchDetail;
        if (!string.IsNullOrEmpty(ExportPath)) exportPath = ExportPath;
        if (App.StaticGabeLib != null && App.StaticGabeLib.Search != null && searchDetail != null)
        {
            App.StaticGabeLib.Search.SearchDetail = (enumSearchDetail)searchDetail;
        }
        loginTime = DateTime.Now;
    }
}

Answer 1

我能想到的是，从两个集合中添加是问题所在。

我重构为仅使用 groupsPlus（没有 userGroup.Group）并且它起作用了。

但我不知道为什么会这样。

更奇怪的是它曾经从两个集合中添加。

未标记为可序列化的异常

Exception not marked as serializable

.net

serialization

exception