How can I easily log a message to a file for debugging purposes?
Today, either Bloglines.com or blogs.MSDN.com blinked, and suddenly I'm seeing old entries on the 'C# Frequently Asked Questions' blog as new. No one has posted anything there in over two years.
Anyway, reading the most recent message, it offered a method for logging a message. Now, ignoring side debates over log4net vs nLog vs. the Event log vs. Trace, and just concentrating on the code post --- It's not very good. Look for yourself (then come back here) http://blogs.msdn.com/csharpfaq/archive/2006/03/27/562555.aspx
Despite being written by a C# MVP (*), it shows a lack of understanding of basic .Net library features, and well as C#. So, I figured, I'd rewrite it. I limited myself to taking what's there and fixing it instead of going an entirely different way (ie, log4net vs nLog vs etc). Here's the revised code:
using System.IO;
public void LogMessageToFile(string msg)
{ string logFilepath = Path.Combine(Environment.GetEnvironmentVariable("TEMP"),"My Log File.txt"); using (StreamWriter sw = File.AppendText(logFilepath))
{ string logLine = String.Format("{0:G}: {1}.", DateTime.Now, msg); sw.WriteLine(logLine);
}
}
A few years ago, I bought a number of books, all with the title of same variation of "C# Cookbook". Again, a lot of bad code. I've been meaning to start a series of articles about revising them.....
(*) Years ago, I was one of the very first C++ MVPs. After ten years, I was dropped from the program. Since then I've tried to become a C# MVP, without any luck. I'm beginning to get bitter about it. ;-)