app.config in DEBUG,INFO, etc

Question

I have a problem with app.config in C#.

I wrote an app.config with key and value=DEBUG, while in main I wrote

DEBUG,INFO,WARN AND ERROR.

The problem is that the value doesn't work and it's printing the main into my log without considering the level.

This is my app config:

<?xml version="1.0"?>
<configuration>
<appSettings>
<add key="FolderName" value="C:\Users\mpilas\Desktop\logs\" />
<add key="FileSize" venter code herealue="10240" />
<add key="LogNameType" value="Date"/> <!--Value can be Size or "Date" -->
<add key="Level" value='DEBUG'/>
</appSettings>
</configuration>

My main is:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Configuration;


namespace ConsoleApplication8 {
    class Program {
        static void Main(string[] args) {
            for (int i = 0; i < 2; i++) {
                LogWriter.Write("Hello", Severity.DEBUG);
                LogWriter.Write("Hello", Severity.INFO);
                LogWriter.Write("Hello", Severity.WARNING);
                LogWriter.Write("Hello", Severity.ERROR);
            }
        }
    }
}

and I have one more class with the name :LogWriter.

namespace ConsoleApplication8 {
    public enum Severity { ERROR, WARNING, INFO, DEBUG };

    public class LogWriter {
        private static string _folder = ConfigurationManager.AppSettings["FolderName"];
        private static long _fileSize = int32.Parse(ConfigurationManager.AppSettings["FileSize"]);
        private static string kindOfType = ConfigurationManager.AppSettings["LogNameType"];

        static LogWriter() {}

        private static string GetFileNameByDate() {
            string dateName= DateTime.Now.ToString("yyyy-MM-dd");
            return  _folder + dateName + ".log";
        }

        private static string GetFileNameBySize() {
            string name = "";
            int counter = 0;

            do {
                if (counter == 0) { name = _folder + kindOfType + ".log"; }
                else {name = _folder + kindOfType + "-" + counter + ".log"; }
                if (File.Exists(name) {
                    counter++;
                    FileInfo realFile = new FileInfo(name);
                    if (realFile.Length > _fileSize) { 
                        name = _folder + kindOfType + "-" + counter + ".log";
                    }
                    else { break; }
                }
                else { break; }
            } while (true);
            return name;
        }


        private static string GetFileName() {
            clearFiles();
            if(kindOfType == "Size") { return GetFileNameBySize(); }
            else { 
              if(kindOfType == "Date") { return GetFileNameByDate(); }
            }
            return "";
        }

        public static void Write(string messgae, Severity severity) {
            try {
                string file = GetFileName();
                StreamWriter log = new StreamWriter(file, true);
                log.WriteLine(DateTime.Now.ToString() + " " + severity.ToString() + ": [" + messgae + "]");
                log.Flush();
                log.Close();
            }
            catch (Exception) {}
        }

        private static void clearFiles() {
            string[] files = Directory.GetFiles(_folder);
            foreach (string file in files) {
                FileInfo fi = new FileInfo(file);
                if (fi.LastAccessTime < DateTime.Now.AddDays(-14)) { fi.Delete(); }
            }
        }
    }
}

How should I treat the key=level and its value on my application?

Answer 1

You may be better off using the existing log scaffolding provided in System.Diagnostics - implement your own TraceListener, which can take care of your 14 day rolling logs etc, then all you need to do is register your trace listener via app.config, then configure your trace levels using a trace switch.

Note that the traceSwitch instance in the backing code is controlled by the <add name="TraceLevelSwitch" value="0" /> config field.

<configuration>
    <system.diagnostics>
        <switches>
            <!--  0-off, 1-error, 2-warn, 3-info, 4-verbose. -->
            <add name="TraceLevelSwitch" value="0" />
        </switches>
        <trace autoflush="true" indentsize="4">
            <listeners>
                <add name="myListener" type="MorPilasTraceListener" />
            </listeners>
        </trace>
    </system.diagnostics>
</configuration>

---

private static TraceSwitch traceSwitch = new TraceSwitch("TraceLevelSwitch", null);

private static void LogInfo(string message)
{
    if(traceSwitch.TraceInfo)
        Trace.TraceInformation(message);
}