/// <summary>
/// Writes a log request to the database.
/// </summary>
/// <remarks>
/// Actual database insert statements are commented out.
/// You can activate this if you have the proper database
/// configuration and access privileges.
/// </remarks>
/// <param name="sender">Sender of the log request.</param>
/// <param name="e">Parameters of the log request.</param>
public void Log(object sender, LogEventArgs e)
{
// Skeleton code of how you could log to database
// Note: A better approach is to use Data Access Object
string message = "Date = " + e.Date.ToString() +
" Severity = " + e.SeverityString +
" Message = " + e.Message;
StringBuilder sql = new StringBuilder();
sql.Append("INSERT INTO LOG (message) ");
sql.Append("VALUES('" + message + "')");
// Commented out for now. You need database to store log values.
//Db.Update(sql.ToString());
}
/// <summary>
/// Write a log request to the event log.
/// </summary>
/// <remarks>
/// Actual event log write entry statements are commented out.
/// Uncomment if you have the proper privileges.
/// </remarks>
/// <param name="sender">Sender of the log request.</param>
/// <param name="e">Parameters of the log request.</param>
public void Log(object sender, LogEventArgs e)
{
string message = "[" + e.Date.ToString() + "] " +
e.SeverityString + ": " + e.Message;
EventLog eventLog = new EventLog();
eventLog.Source = "Patterns In Action";
// Map severity level to an event log entry type
EventLogEntryType type = EventLogEntryType.Error;
if (e.Severity < LogSeverity.Warning) type = EventLogEntryType.Information;
if (e.Severity < LogSeverity.Error) type = EventLogEntryType.Warning;
// In try catch. You will need proper privileges to write to eventlog.
try { eventLog.WriteEntry(message, type); }
catch { /* do nothing */ }
}
/// <summary>
/// Write a log request to a file.
/// </summary>
/// <param name="sender">Sender of the log request.</param>
/// <param name="e">Parameters of the log request.</param>
public void Log(object sender, LogEventArgs e)
{
string message = "[" + e.Date.ToString() + "] " +
e.SeverityString + ": " + e.Message;
FileStream fileStream;
// Create directory, if necessary
try
{
fileStream = new FileStream(_fileName, FileMode.Append);
}
catch (DirectoryNotFoundException)
{
Directory.CreateDirectory((new FileInfo(_fileName)).DirectoryName);
fileStream = new FileStream(_fileName, FileMode.Append);
}
catch (IOException)
{
System.Threading.Thread.Sleep(10);
fileStream = new FileStream(_fileName, FileMode.Append);
}
// NOTE: Be sure you have write privileges to folder
StreamWriter writer = new StreamWriter(fileStream);
try
{
writer.WriteLine(message);
}
catch { /* do nothing for now */}
finally
{
try
{
writer.Close();
}
catch { /* do nothing for now */}
}
}
/// <summary>
/// Invoke the Log event.
/// </summary>
/// <param name="e">Log event parameters.</param>
public void OnLog(LogEventArgs e)
{
if (Log != null)
{
Log(this, e);
}
}
