private void LogFromUIThread(string message, LogViewLoggingLevel level)
{
string logEntry = $"{DateTime.Now:HH:mm:ss.fff} - {message}";
if (LoggingLevel <= level)
{
SolidColorBrush foregroundBrush = LoggingBrushes[(int)level];
if (IsLogViewFull)
{
// Once the view is full, messages go only to the debug console.
System.Diagnostics.Debug.WriteLine(logEntry);
return;
}
if (LoggingListBox.Items.Count >= MaxItemsInLogView)
{
IsLogViewFull = true;
System.Diagnostics.Debug.WriteLine(logEntry);
logEntry = "Log window is full";
foregroundBrush = new SolidColorBrush(Colors.Red);
}
LoggingListBox.Items.Insert(0, new TextBlock()
{
Text = logEntry, Foreground = foregroundBrush
});
}
else if (level != LogViewLoggingLevel.Verbose)
{
// Non-Verbose messages blocked from the LogView are shown on the debug console.
System.Diagnostics.Debug.WriteLine($"{level}: {logEntry}");
}
}
/// <summary>
/// Provides logging with filtering based on UI settings.
/// Logging functions tangential to main scenarios should specify a log view level less than Always.
/// </summary>
/// <param name="message">message to be logged</param>
/// <param name="level">message category</param>
public async void Log(string message, LogViewLoggingLevel level = LogViewLoggingLevel.Always)
{
if (Dispatcher.HasThreadAccess)
{
LogFromUIThread(message, level);
}
else
{
await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
LogFromUIThread(message, level);
});
}
}
/// <summary>
/// Changes the logging level at which messages are filtered.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void LogLevel_Changed(object sender, SelectionChangedEventArgs e)
{
LoggingLevel = (LogViewLoggingLevel)LogLevelComboBox.SelectedIndex;
}