为什么我不能挽救我在XNA的Xbox 360游戏？

Question

我遇到了我的节约问题的游戏，我已经花了几个小时寻找，没有任何运气的解决方案。我用这个代码写在别人的博客：

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; 
     } 
    } 
} 

但每当我运行它，我得到这个消息：

类型的未处理的异常“System.InvalidOperationException”发生在Microsoft.Xna.Framework .Storage.dll

附加信息：直到此PlayerIndex使用的所有上一个容器都已处置完毕，才能打开一个新的容器。

我环顾四周，答案和大多数的建议建议使用using语句。所以我用这样使用：

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。我究竟做错了什么？

Answer 1

此post中的人遇到了相同的问题，这是由使用语句的作用域之外的某种异常处理引起的，而这种异常处理会导致不正确地调用dispose。尝试用try catch包装你的使用语句。

另外，我发现这个post在搜索解决方案时很有帮助。

祝你好运。