IsolatedStorageFile給出異常

Question

在windows phone 7中，我試圖寫入一個文件，然後嘗試從一個文件中讀取數據，但是在讀取它時給出了下面的異常。

public static void writeToFile(String videoUrl) 
{ 
    IsolatedStorageFile store = IsolatedStorageFile.GetUserStoreForApplication(); 
    store.CreateDirectory("MyFolder"); 
    IsolatedStorageFileStream stream = new IsolatedStorageFileStream("MyFolder\\data.txt", FileMode.Append, 
              FileAccess.Write, store); 
    StreamWriter writer = new StreamWriter(stream); 
    writer.WriteLine(videoUrl); 
} 

public static void readFromFile() 
{ 
    try 
    { 
     IsolatedStorageFile store = IsolatedStorageFile.GetUserStoreForApplication(); 
     IsolatedStorageFileStream stream = new IsolatedStorageFileStream("MyFolder\\data.txt", FileMode.Open, 
               store); 
     StreamReader reader = new StreamReader(stream); 
     string line; 
     while ((line = reader.ReadLine()) != null) 
     { 
      Debug.WriteLine("kkkkkk-----------------" + line); // Write to console. 
     } 
    } 
    catch (Exception ex) 
    { 
     Debug.WriteLine("ESPNGoalsUtil::readFromFile : " + ex.ToString()); 
    } 

} 

例外：

System.IO.IsolatedStorage.IsolatedStorageException: Operation not permitted on IsolatedStorageFileStream. 
    at System.IO.IsolatedStorage.IsolatedStorageFileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, IsolatedStorageFile isf) 
    at System.IO.IsolatedStorage.IsolatedStorageFileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, IsolatedStorageFile isf) 
    at System.IO.IsolatedStorage.IsolatedStorageFileStream..ctor(String path, FileMode mode, IsolatedStorageFile isf) 
    at ESPNGoals.Utility.ESPNGoalsUtil.readFromFile() 

我寫的文件，然後讀取相同的方法文件，而不是關閉模擬器。

Answer 1

您需要在之前致電Close，然後writeToFile返回（或更好地將代碼包裝在using塊中）。

這同樣適用於readFromFile中的StreamReader。