爲什麼我不能挽救我在XNA的Xbox 360遊戲？

Question

我遇到了我的節約問題的遊戲，我已經花了幾個小時尋找，沒有任何運氣的解決方案。我用這個代碼寫在別人的博客：

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; 
     } 
    } 
} 

但每當我運行它，我得到這個消息：

類型的未處理的異常「System.InvalidOperationException」發生在Microsoft.Xna.Framework .Storage.dll

附加信息：直到此PlayerIndex使用的所有上一個容器都已處置完畢，才能打開一個新的容器。

我環顧四周，答案和大多數的建議建議使用using語句。所以我用這樣使用：

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結果。我究竟做錯了什麼？

Answer 1

此post中的人遇到了相同的問題，這是由使用語句的作用域之外的某種異常處理引起的，而這種異常處理會導致不正確地調用dispose。嘗試用try catch包裝你的使用語句。

另外，我發現這個post在搜索解決方案時很有幫助。

祝你好運。