static void InitLogHelper()
{
try
{
LogParameter logparameter = new LogParameter();
if (ConfigurationManager.AppSettings.AllKeys.Contains(LogHelper.LOGDESTINATIONKEY))
{
logparameter.LogDestinationKey = ConfigurationManager.AppSettings[LogHelper.LOGDESTINATIONKEY].Trim();
}
if (ConfigurationManager.AppSettings.AllKeys.Contains(LogHelper.AUTOFLUSHKEY))
{
logparameter.AutoFlushKey = ConfigurationManager.AppSettings[LogHelper.AUTOFLUSHKEY].Trim();
}
if (ConfigurationManager.AppSettings.AllKeys.Contains(LogHelper.LOGPATHKEY))
{
logparameter.LogPathKey = ConfigurationManager.AppSettings[LogHelper.LOGPATHKEY].Trim();
}
LogHelper.Init(logparameter);
}
catch (Exception e)
{
Trace.WriteLine(e.Message);
}
}
/// <summary>
/// Init by configuration
/// </summary>
public static void Init(LogParameter logParameter)
{
if (isInitialized)
{
return;
}
string logPath = string.Empty;
string logDestination = string.Empty;
FileStream stream;
FileMode fileMode;
#if Debug
LogDest logDest = LogDest.Debugger;
#else
LogDest logDest = LogDest.None;
#endif
// Get log destination
try
{
logDestination = logParameter.LogDestinationKey.Trim();
int logDestSetting = 0;
if (int.TryParse(logDestination, out logDestSetting))
{
logDest = (LogDest)logDestSetting;
}
// auto flush setting
Trace.AutoFlush = logParameter.AutoFlushKey.Trim() == "1";
}
catch (Exception e)
{
Trace.WriteLine(e.Message);
}
switch (logDest)
{
case LogDest.None:
{
Trace.Listeners.Clear();
isInitialized = true;
return;
}
case LogDest.Debugger:
{
//use default listener
isInitialized = true;
needOutputLog = true;
return;
}
case LogDest.File:
{
//2 - File (Overwrite the old file and doesn't close it until application exits)
Trace.Listeners.Clear();
fileMode = FileMode.Create;
break;
}
case LogDest.FileAppend:
{
//3 - File (Append the log at the end of file and close it after each log output)
Trace.Listeners.Clear();
fileMode = FileMode.Append;
break;
}
default:
Trace.WriteLine("### Wrong log destination! ###");
return;
}
// check log file path
//path is null
logPath = logParameter.LogPathKey.Trim();
if (string.IsNullOrEmpty(logPath))
{
return;
}
//path has invalid char
var pathCharArray = logPath.ToCharArray();
if (pathCharArray.Any(o => Path.GetInvalidPathChars().Contains(o)))
{
return;
}
//FileName has invalid char
//note : invalid file name chars count is 41,
//invalid path chars count is 36
//and , the top 36 of invalid file name chars are same as invalid path chars
//so, first check path invalid chars, second check filename, only filename
var filenameCharArray = Path.GetFileName(logPath).ToCharArray();
if (filenameCharArray.Any(o => Path.GetInvalidFileNameChars().Contains(o)))
{
return;
}
//EnvironmentVariables Path
if (logPath.Contains('%'))
{
logPath = Environment.ExpandEnvironmentVariables(logPath);
}
//change relative path to absolute path.
if (string.IsNullOrEmpty(Path.GetPathRoot(logPath)))
{
logPath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, logPath);
}
// log by file
//risk:directory readonly;need administrator right to createfile;and so on
//use try-catch
try
{
if (!Directory.Exists(Path.GetDirectoryName(logPath)))
{
Directory.CreateDirectory(Path.GetDirectoryName(logPath));
}
stream = File.Open(logPath, fileMode, FileAccess.Write, FileShare.ReadWrite);
TextWriterTraceListener text = new TextWriterTraceListener(stream);
//text.TraceOutputOptions = TraceOptions.DateTime;
Trace.Listeners.Add(text);
}
catch (FileNotFoundException ex)
{
Trace.Write(ex);
}
needOutputLog = true;
isInitialized = true;
}
