序列化异常：试图反序列化一个空流

Question

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。当我第一次尝试启动游戏时，我收到以下错误：

序列化异常：试图反序列化一个空流。

我尝试检查长度是否大于 0 并尝试了 try/catch 版本。他们都得到了同样的错误，它陷入了一个循环。也许有一种方法可以检查您是否第一次打开游戏并先保存？我宁愿找到一种方法来确保文件在加载之前有数据。或者也许我可以创建一个数据而不是使用null？任何帮助将不胜感激。

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;

        }
    }
}

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()
    {
        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;
        }
    }
}

Answer 1

我只是发布最终解决方案，因为太多人修复了错误，并且不会分享和发布以帮助将来的任何人。 正如上面的“Dymaniod”指出的那样，我想使用“stream.length”而不是“path.length”，因为“WarmedxMints”也指出了统一的答案，路径的长度总是大于 0。 我仍然有一个加载错误循环。工作的最终脚本如下。 感谢帮助过的两位！！

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;
        }
    }

}