ファイルを OneDrive にアップロードしようとしました。OneDrive に正常に接続して認証していますが、アップロードしようとすると次のエラーが表示されます。Object reference not set to an instance of an object.
コードは次のとおりです。
IsolatedStorageFile iso = IsolatedStorageFile.GetUserStoreForApplication();
// Release all resources from DB
App.AppViewModel.DisposeCurrentDB();
IsolatedStorageFileStream toUploadStream = iso.OpenFile(AppResources.DatabaseName + ".sdf", FileMode.Open);
LiveConnectClient liveClient = new LiveConnectClient(oneDriveAuthClient.Session);
try
{
LiveOperationResult uploadResult = await liveClient.BackgroundUploadAsync(
oneDriveFolderId,
DatabaseBackupname,
toUploadStream.AsInputStream(),
OverwriteOption.Overwrite);
dynamic result = uploadResult.Result;
MessageBox.Show("Upload successful. Uploaded to " + result.source);
}
catch (LiveConnectException ex)
{
MessageBox.Show("Error uploading backup: " + ex.Message);
}
App.AppViewModel.RefreshCurrentDB();
メソッドはBackgroundUploadAysnc例外をスローします。が設定され、oneDriveFolderIdOneDrive に存在します。DatabaseBackupname は、OneDrive に存在しない正しい新しいファイル名です。デバッガーでストリームを確認したところ、このオブジェクトは空ではなく、サイズがありました。
Stacktrace
at Microsoft.Live.Operations.TailoredUploadOperation.<OnGetUploadLinkCompleted>d__4.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.AsyncMethodBuilderCore.<ThrowAsync>b__4(Object state)
at System.Threading.QueueUserWorkItemCallback.WaitCallback_Context(Object state)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()
at System.Threading.ThreadPoolWorkQueue.Dispatch()
at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback()
アップロードコードを次のように変更しました。
LiveUploadOperation operation = await liveClient.CreateBackgroundUploadAsync(
oneDriveFolderId,
DatabaseBackupname,
toUploadStream,
OverwriteOption.DoNotOverwrite);
await operation.StartAsync();
CreateBackgroundUploadAsyncメソッドは次の例外をスローします。
Message = "Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED))"
at Windows.Networking.BackgroundTransfer.BackgroundUploader.CreateUploadFromStreamAsync(Uri uri, IInputStream sourceStream)
at Microsoft.Live.Operations.CreateBackgroundUploadOperation.<OnGetUploadLinkCompleted>d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.AsyncMethodBuilderCore.<ThrowAsync>b__4(Object state)
at System.Threading.QueueUserWorkItemCallback.WaitCallback_Context(Object state)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()
at System.Threading.ThreadPoolWorkQueue.Dispatch()
at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback()