为什么我无法在 XNA 中保存我的 Xbox 360 游戏？

Question

我在保存游戏时遇到了问题，我花了几个小时寻找解决方案，但没有任何运气。我使用了别人博客上写的代码:

public class SaveandLoad
{
    StorageDevice device;
    string containerName = "ChainedWingsContainer";
    string filename = "mysave.sav";
    public struct SaveGame
    {
        public int s_mission;
    }
    public void InitiateSave()
    {
        if (!Guide.IsVisible)
        {
            device = null;
            StorageDevice.BeginShowSelector(PlayerIndex.One, this.SaveToDevice, null);
        }
    }
    void SaveToDevice(IAsyncResult result)
    {
        device = StorageDevice.EndShowSelector(result);
        if (device != null && device.IsConnected)
        {
            SaveGame SaveData = new SaveGame()
            {
                s_mission = Game1.mission,
            };
            IAsyncResult r = device.BeginOpenContainer(containerName, null, null);
            result.AsyncWaitHandle.WaitOne();
            StorageContainer container = device.EndOpenContainer(r);
            if (container.FileExists(filename))
                 container.DeleteFile(filename);
            Stream stream = container.CreateFile(filename);
            XmlSerializer serializer = new XmlSerializer(typeof(SaveGame));
            serializer.Serialize(stream, SaveData);
            stream.Close();
            container.Dispose();
            result.AsyncWaitHandle.Close();
        }
    }
    public void InitiateLoad()
    {
        if (!Guide.IsVisible)
        {
            device = null;
            StorageDevice.BeginShowSelector(PlayerIndex.One, this.LoadFromDevice, null);
        }
    }
    void LoadFromDevice(IAsyncResult result)
    {
        device = StorageDevice.EndShowSelector(result);
        IAsyncResult r = device.BeginOpenContainer(containerName, null, null);
        result.AsyncWaitHandle.WaitOne();
        StorageContainer container = device.EndOpenContainer(r);
        result.AsyncWaitHandle.Close();
        if (container.FileExists(filename))
        {
            Stream stream = container.OpenFile(filename, FileMode.Open);
            XmlSerializer serializer = new XmlSerializer(typeof(SaveGame));
            SaveGame SaveData = (SaveGame)serializer.Deserialize(stream);
            stream.Close();
            container.Dispose();
            //Update the game based on the save game file
            Game1.mission = SaveData.s_mission;
        }
    }
}

但是每当我运行它，我得到这个消息:

类型为"System"的未处理异常。InvalidOperationException'发生在Microsoft.Xna.Framework.Storage.dll

附加信息:一个新的容器不能被打开，直到这个PlayerIndex使用的所有以前的容器被处理掉。

我四处寻找答案，大多数建议都建议使用Using语句。所以我使用Using like So:

    void SaveToDevice(IAsyncResult result)
    {
        device = StorageDevice.EndShowSelector(result);
        if (device != null && device.IsConnected)
        {
            SaveGame SaveData = new SaveGame()
            {
                s_mission = Game1.mission,
            };
            IAsyncResult r = device.BeginOpenContainer(containerName, null, null);
            result.AsyncWaitHandle.WaitOne();
            using (StorageContainer container = device.EndOpenContainer(r))
            {
                if (container.FileExists(filename))
                    container.DeleteFile(filename);
                Stream stream = container.CreateFile(filename);
                XmlSerializer serializer = new XmlSerializer(typeof(SaveGame));
                serializer.Serialize(stream, SaveData);
                stream.Close();
                container.Dispose();
            }
            result.AsyncWaitHandle.Close();
        }
    }

但我仍然得到相同的结果。我做错了什么?

Answer 1

这个帖子里的人也有同样的问题，是由using语句范围之外的某种异常处理引起的，导致dispose不能被正确调用。请尝试将using语句包装在Try catch中。

同时，我发现这篇文章在寻找解决方案时很有帮助。

好运。