C# 序列化异常：尝试反序列化空流

我正在制作一个游戏，并将其用作我的保存/加载系统，然后将数据存储在单独的“GameData”脚本中。当我第一次尝试开始游戏时，出现以下错误：

序列化异常：尝试反序列化空流

我尝试检查长度是否大于0，并尝试了try/catch版本。它们都会得到相同的错误，并陷入循环。也许有一种方法可以检查你是否是第一次打开游戏并先保存？我宁愿在加载之前找到一种方法来确保文件中有数据。或者我可以创建一个数据，而不是使用

null

？任何帮助都将不胜感激

这是脚本的长度版本

using UnityEngine;
using System.Runtime.Serialization.Formatters.Binary;
using System.IO;
using System;

public static class SaveSystem
{
    public static void SaveData(PlayerCollision playerCol)
    {
        BinaryFormatter formatter = new BinaryFormatter();
        string path = Application.persistentDataPath + "/player.fun";
        FileStream stream = new FileStream(path, FileMode.Create);

        GameData data = new GameData(playerCol);

        formatter.Serialize(stream, data);
        stream.Close();
    }

    public static GameData LoadData()
    {
        string path = Application.persistentDataPath + "/player.fun";
        if (File.Exists(path) && path.Length > 0)
        {
            BinaryFormatter formatter = new BinaryFormatter();
            FileStream stream = new FileStream(path, FileMode.Open);
            GameData data = formatter.Deserialize(stream) as GameData;
            stream.Close();
            return data;
        }
        else
        {
            Debug.LogError("Save file was not found in " + path);
            return null;

        }
    }
}

using UnityEngine;
using System.Runtime.Serialization.Formatters.Binary;
using System.IO;
using System;

public static class SaveSystem
{
    public static void SaveData(PlayerCollision playerCol)
    {
        BinaryFormatter formatter = new BinaryFormatter();
        string path = Application.persistentDataPath + "/player.fun";
        FileStream stream = new FileStream(path, FileMode.Create);

        GameData data = new GameData(playerCol);

        formatter.Serialize(stream, data);
        stream.Close();
    }

    public static GameData LoadData()
    {
        try
        {
            string path = Application.persistentDataPath + "/player.fun";
            if (File.Exists(path))
            {
                BinaryFormatter formatter = new BinaryFormatter();
                FileStream stream = new FileStream(path, FileMode.Open);
                GameData data = formatter.Deserialize(stream) as GameData;
                stream.Close();
                return data;
            }
            else
            {
                Debug.LogError("Save file was not found in " + path);
                return null;
            }
        }
        catch (System.Exception e)
        {
            Debug.LogError("Error Loading Save " + e);
            return null;
        }
    }
}

这是脚本的try/catch版本

using UnityEngine;
using System.Runtime.Serialization.Formatters.Binary;
using System.IO;
using System;

public static class SaveSystem
{
    public static void SaveData(PlayerCollision playerCol)
    {
        BinaryFormatter formatter = new BinaryFormatter();
        string path = Application.persistentDataPath + "/player.fun";
        FileStream stream = new FileStream(path, FileMode.Create);

        GameData data = new GameData(playerCol);

        formatter.Serialize(stream, data);
        stream.Close();
    }

    public static GameData LoadData()
    {
        string path = Application.persistentDataPath + "/player.fun";
        if (File.Exists(path) && path.Length > 0)
        {
            BinaryFormatter formatter = new BinaryFormatter();
            FileStream stream = new FileStream(path, FileMode.Open);
            GameData data = formatter.Deserialize(stream) as GameData;
            stream.Close();
            return data;
        }
        else
        {
            Debug.LogError("Save file was not found in " + path);
            return null;

        }
    }
}

using UnityEngine;
using System.Runtime.Serialization.Formatters.Binary;
using System.IO;
using System;

public static class SaveSystem
{
    public static void SaveData(PlayerCollision playerCol)
    {
        BinaryFormatter formatter = new BinaryFormatter();
        string path = Application.persistentDataPath + "/player.fun";
        FileStream stream = new FileStream(path, FileMode.Create);

        GameData data = new GameData(playerCol);

        formatter.Serialize(stream, data);
        stream.Close();
    }

    public static GameData LoadData()
    {
        try
        {
            string path = Application.persistentDataPath + "/player.fun";
            if (File.Exists(path))
            {
                BinaryFormatter formatter = new BinaryFormatter();
                FileStream stream = new FileStream(path, FileMode.Open);
                GameData data = formatter.Deserialize(stream) as GameData;
                stream.Close();
                return data;
            }
            else
            {
                Debug.LogError("Save file was not found in " + path);
                return null;
            }
        }
        catch (System.Exception e)
        {
            Debug.LogError("Error Loading Save " + e);
            return null;
        }
    }
}

---

我只是发布最终的解决方案，因为有太多人修复了错误，而不会在将来分享和发布帮助任何人。 正如上面的“Dymaniod”指出的，我想使用“stream.length”而不是“path.length”，因为“WarmedxMints”也指出了统一答案，路径的长度总是大于0。 我仍然有一个加载错误循环。最后一个有效的脚本如下。 感谢你们两位的帮助

using UnityEngine;
using System.Runtime.Serialization.Formatters.Binary;
using System.IO;
using System;

public static class SaveSystem
{



    public static void SaveData(PlayerCollision playerCol)
    {
        BinaryFormatter formatter = new BinaryFormatter();
        string path = Application.persistentDataPath + "/player.fun";
        FileStream stream = new FileStream(path, FileMode.Create);

        GameData data = new GameData(playerCol);

        formatter.Serialize(stream, data);
        stream.Close();
    }

    public static GameData LoadData(PlayerCollision playerCol)
    {
        string path = Application.persistentDataPath + "/player.fun";
        FileStream stream = new FileStream(path, FileMode.Open);
        if (File.Exists(path) && stream.Length > 0)
        {
            BinaryFormatter formatter = new BinaryFormatter();
            GameData data = formatter.Deserialize(stream) as GameData;
            stream.Close();
            return data;
        }
        else
        {
            Debug.LogError("Save file was not found in " + path);
            BinaryFormatter formatter = new BinaryFormatter();
            GameData data = new GameData(playerCol);
            formatter.Serialize(stream, data);
            stream.Close();
            return data;
        }
    }

}

---

path.Length

不是您想要的。改为选中流的长度。您的文件似乎有0个字节。谢谢您的帮助！它消除了错误。然后，它开始运行debug.log错误消息的循环，但我通过在“else{}”下运行save函数，而不是仅仅使用“returnnull”，成功地解决了这个问题。非常感谢。既然

FileStream

是一个

IDisposable

你应该使用

使用（FileStream=newfilestream（path，FileMode.Create）{…}

那么你就不必隐式调用

流。关闭

我也不会使用

新的FileStream

，但实际上更像是使用（var stream=File.Open）（路径，FileMode.OpenOrCreate，FileAccess.ReadWrite，FileShare.ReadWrite））