獲取HRESULT E_FAIL錯誤，如果拷貝大文件在Windows運行時

Question

我收到此錯誤消息時，我嘗試複製大文件（〜500 MB）：

錯誤HRESULT E_FAIL已從調用返回一個COM組件。 HRESULT：-2147467259

這是我使用的文件複製代碼：

await file.CopyAsync(storageFolder, name, NameCollisionOption.GenerateUniqueName); 

多虧了它背後的開發商，是不是很豐富。

那麼如何解決這個問題呢？謝謝。

Answer 1

我有1.5 GB的文件進行測試，並能複製的例外（我在的Windows Phone 8.1測試它）。手動設置內部緩衝區大小似乎可以解決問題，但請注意這會影響應用程序。 Read under the Buffer section on MSDN on dealing with large data sets.

的CreateNewFileAsync（）方法簡單地創建一個新的文件：

祝您好運和快樂編碼。

var folder = Windows.ApplicationModel.Package.Current.InstalledLocation; 
var file = await folder.GetFileAsync("largeFile.txt"); 

StorageFolder tempFolder = ApplicationData.Current.TemporaryFolder; 

// Exception 
if (file != null) 
{ 
    StorageFile copiedFile = await file.CopyAsync(tempFolder, "copied.txt", NameCollisionOption.GenerateUniqueName); 
} 


// Setting the internal buffer to 1024 
// Be aware- from MSDN: However, this buffer is allocated on the large object heap 
// and could potentially degrade garbage collection performance. 
// You should only use large buffer sizes if it will noticeably improve the performance of your app. 
var newFile = await CreateNewFileAsync(); 

using (Stream ss = await file.OpenStreamForReadAsync()) 
using (Stream sd = await newFile.OpenStreamForWriteAsync()) 
{ 
    await ss.CopyToAsync(sd, 1024); 
    var fileProps = await file.GetBasicPropertiesAsync(); 
    var size = fileProps.Size; 
}