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Create Log File

Posted on 2008-10-01
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Last Modified: 2012-05-05
In  C3 Windows Form application I would like to create the method, I would call Write2Log where I will be writing my exceptions in a manner Write2Log(ex.Message);
References I am using in my applications are:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Configuration;
using System.Data.SqlClient;
using System.Deployment.Application;

Help me with  a code.  

           


           
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Question by:Aquarus
  • 3
5 Comments
 
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Accepted Solution

by:
libin_v earned 300 total points
ID: 22616076

Extract from http://www.doogal.co.uk/exception.php
 
    private void Write2Log(string error)
    {
      string filename = Path.GetDirectoryName(Application.ExecutablePath);
      filename += "\\BugReport.txt";
 
      ArrayList data = new ArrayList();
 
      lock (this)
      {
        if (File.Exists(filename))
        {
          using (StreamReader reader = new StreamReader(filename))
          {
            string line = null;
            do
            {
              line = reader.ReadLine();
              data.Add(line);
            }
            while (line != null);
          }
        }
 
        // truncate the file if it's too long
        int writeStart = 0;
        if (data.Count > 500)
          writeStart = data.Count - 500;
 
        using (StreamWriter stream = new StreamWriter(filename, false))
        {
          for (int i = writeStart; i < data.Count; i++)
          {
            stream.WriteLine(data[i]);
          }
 
          stream.Write(error);
        }
      }
    }

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LVL 13

Expert Comment

by:Michael_D
ID: 22616081
Attached is simple method of logging.
using System.IO;
......
 
    public static void Write2Log(String logMessage)
    {
        using (StreamWriter w = File.AppendText("log.txt"))
        {
        w.Write("\r\nLog Entry : ");
        w.WriteLine("{0} {1}", DateTime.Now.ToLongTimeString(),
            DateTime.Now.ToLongDateString());
        w.WriteLine("  :");
        w.WriteLine("  :{0}", logMessage);
        w.WriteLine ("-------------------------------");
        // Update the underlying file.
        w.Flush(); 
        w.Close();
        }
    }

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Expert Comment

by:Michael_D
ID: 22616100
oops, forgot to refresh browser...
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Author Comment

by:Aquarus
ID: 22616281
I received the following error:

The type or namespace name 'ArrayList' could not be found (are you missing a using directive or an assembly reference?)      
What references am I missing?
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LVL 13

Assisted Solution

by:Michael_D
Michael_D earned 200 total points
ID: 22616309
ArrayList is in System.Collections Namespace
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