計算隔離存儲器中文件的大小

Question

除了打開文件流並調用「長度」屬性外，我似乎無法找到確定隔離存儲中文件大小的方法。有沒有更有效的方法來做到這一點？

謝謝

Answer 1

我發現了一點點黑客，使其工作。你所要做的就是使用反射來獲取完全合格的文件路徑，文件，然後你想創建一個新的文件信息對象：

//This is the private field name used for reflection 
private const string IsolatedStoreRootDir = "m_RootDir"; 

//This method takes a file path relative to isolated storage 
//and the current store 
private static FileInfo GetFileInfo(string path, IsolatedStorageFile store) 
{ 
    return new FileInfo(GetFullyQualifiedFileName(path, store)); 
} 

//This gets the fully qualified path of the root isolated storage directory 
//then appends the relative path to it. 
private static string GetFullyQualifiedFileName(string path, IsolatedStorageFile store) 
{ 
    return Path.Combine(store.GetType() 
     .GetField(IsolatedStorageFileSystem.IsolatedStoreRootDir, 
     System.Reflection.BindingFlags.NonPublic | 
     System.Reflection.BindingFlags.Instance).GetValue(store).ToString(), path); 
} 

//Here's how it's used 
static void Main(string[] args) 
{ 
    var store = IsolatedStorageFile.GetUserStoreForAssembly(); 

    var length = GetFileInfo("TestFile.txt", store).Length; 
} 

Answer 2

long Size = 0L; 
using (IsolatedStorageFileStream stream = new IsolatedStorageFileStream(filePath, FileMode.Open, FileAccess.Read, isoFile)) 
{ 
    Size = stream.Length; 
}