public async Task Log(Exception exception)
{
try
{
if (logSession != null)
{
StringBuilder sb = new StringBuilder();
sb.AppendLine(string.Format("Error Message: {0}", exception.Message));
sb.AppendLine(string.Format("UnhandledError: 0x{0:X})", exception.HResult));
sb.AppendLine(string.Format("Stacktrace: {0}", exception?.StackTrace ?? string.Empty));
logChannel.LogMessage(sb.ToString(), LoggingLevel.Critical);
await semaphoreLock.WaitAsync();
try
{
await logSession.SaveToFileAsync(logFolder, fileName);
}
finally
{
semaphoreLock.Release();
}
}
}
catch { }
}
/// <summary>
/// Invoked when Navigation to a certain page fails
/// </summary>
/// <param name="sender">The Frame which failed navigation</param>
/// <param name="e">Details about the navigation failure</param>
async void OnNavigationFailed(object sender, NavigationFailedEventArgs e)
{
var message = string.Format("Failed to navigate to page: {0}", e.SourcePageType.FullName);
LogEventSource.Log.Critical(message);
channel.LogMessage(message, LoggingLevel.Critical);
var file =
await session.SaveToFileAsync(ApplicationData.Current.TemporaryFolder, "log_" + DateTime.Now.Ticks);
throw new Exception("Failed to load Page " + e.SourcePageType.FullName);
}
public async Task <StorageFile> SaveLogToFileAsync(string prefix = null)
{
if (_session == null || _channel == null)
{
Debug.WriteLine("Error: Logger is not initialized");
return(null);
}
var fileName = prefix + "_" + DateTime.UtcNow.ToString("yyyy-MM-ddTHHmmss") + ".etl";
var logFolder = await ApplicationData.Current.LocalFolder.CreateFolderAsync(LogFolderName, CreationCollisionOption.OpenIfExists);
return(await _session.SaveToFileAsync(logFolder, fileName));
}
private StorageFile SaveFile()
{
if (LoggingSession == null)
{
return(null);
}
var task = LoggingSession
.SaveToFileAsync(LoggingFolder, $"{DateTime.Now.ToString("yyyy-MM-dd_hh-mm-ss-tt")}.{BaseName}.etl")
.AsTask();
task.Wait();
return(task.Result);
}
private static async Task <string> SaveLogInMemoryToFileAsync()
{
StorageFolder sampleAppDefinedLogFolder =
await ApplicationData.Current.LocalFolder.CreateFolderAsync(LOG_FILE_FOLDER_NAME,
CreationCollisionOption.OpenIfExists);
string newLogFileName = "Log-" + GetTimeStamp() + ".etl";
StorageFile newLogFile = await _Session.SaveToFileAsync(sampleAppDefinedLogFolder, newLogFileName);
if (newLogFile != null)
{
return(newLogFile.Path);
}
else
{
return(null);
}
}