C#:输入流不是有效的二进制格式

Question

我在C#/ ASP.NET中反序列化有问题,它给出了确切的错误:

输入流不是有效的二进制格式.起始内容(以字节为单位)为:41-41-45-41-41-41-44-2F-2F-2F-2F-2F-41-51-41-41-41 ...

我想做什么

我有一个有3个班级的结构.我有一个类A,它是一个基类,然后是B和C,它们是从A派生的.

我试图在类型为VARCHAR(MAX)的列中使用LINQ to SQL在数据库中存储随机类型的B和C. 我不能使用BINARY,因为长度大约是15.000.

我的代码......

错误位于LAST代码块中

业务层中的C#代码 - 存储记录

    private void AddTraceToDatabase(FightTrace trace)
    {
        MemoryStream recieverStream = new MemoryStream();
        MemoryStream firedStream = new MemoryStream();
        MemoryStream moveStream = new MemoryStream();

        BinaryFormatter binaryFormatter = new BinaryFormatter();
        binaryFormatter.Serialize(recieverStream,trace.Reciever);
        binaryFormatter.Serialize(firedStream,trace.FiredBy);
        binaryFormatter.Serialize(moveStream,trace.Move);

        string reciever = Convert.ToBase64String(recieverStream.ToArray());
        string fired = Convert.ToBase64String(firedStream.ToArray());
        string move = Convert.ToBase64String(moveStream.ToArray());


        this.dataAccess.AddFightTrace(trace.TraceType.ToString(),reciever,move,fired,trace.DateTime,this.FightId);
    }

数据访问层中的C#代码 - 存储记录

    public void AddFightTrace(string type, string reciever, string Move, string firedBy, DateTime firedAt, int fightid)
    {
        GameDataContext db = new GameDataContext();
        dbFightTrace trace = new dbFightTrace();
        trace.TraceType = type;

        trace.Reciever = reciever;
        trace.Move = Move;
        trace.FiredBy = firedBy;
        trace.FiredAt = firedAt;
        trace.FightId = fightid;

        db.dbFightTraces.InsertOnSubmit(trace);
        db.SubmitChanges();
    }

C#代码获取数据库中的条目

    public List<dbFightTrace> GetNewTraces(int fightid, DateTime lastUpdate)
    {
        GameDataContext db = new GameDataContext();
        var data = from d in db.dbFightTraces
                   where d.FightId==fightid && d.FiredAt > lastUpdate
                   select d;

        return data.ToList();
    }

C#Factory,从LINQ转换为SQL类到我的对象

这就是错误来了

    public FightTrace CreateTrace(dbFightTrace trace)
    {
        TraceType traceType = (TraceType) Enum.Parse(typeof(TraceType), trace.TraceType);
        BinaryFormatter formatter = new BinaryFormatter();

        System.Text.UTF8Encoding enc = new System.Text.UTF8Encoding();

        MemoryStream recieverStream = new MemoryStream(enc.GetBytes(trace.Reciever));
        recieverStream.Position = 0;
        MemoryStream firedStream = new MemoryStream(enc.GetBytes(trace.FiredBy));
        firedStream.Position = 0;
        MemoryStream movedStream = new MemoryStream(enc.GetBytes(trace.Move));
        movedStream.Position = 0;

        // THE NEXT LINE HERE CAUSES THE ERROR
        NPC reciever = formatter.Deserialize(recieverStream) as NPC;
        Player fired = formatter.Deserialize(firedStream) as Player;
        BaseAttack attack = formatter.Deserialize(movedStream) as BaseAttack;

        FightTrace t = new FightTrace(traceType,reciever,attack,fired);
        t.TraceId = trace.FightTraceId;
        t.DateTime = trace.FiredAt;
        return t;
    }

因此,在运行第一个Deserialize方法时会发生错误,并出现上述错误.

我尝试了几件事,但我在这一件事上很遗憾.

谢谢!:-)

Answer 1

我认为从 base64 到 bytes 的转换是错误的。

尝试这个：

var bytes = Convert.FromBase64String(base64);

=>

 MemoryStream recieverStream = new MemoryStream(Convert.FromBase64String(trace.Reciever));

  NPC reciever = formatter.Deserialize(recieverStream) as NPC;