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C#: New log file daily?

Posted on 2004-10-03
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Last Modified: 2012-08-13
Q. How can I create a new log file each day using C#?
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Question by:kvnsdr
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by:a_goat
ID: 12212276
Use a logging package.  It makes your logging much more robust and you can do things like that easily.  The best two I've seen are log4net ( http://logging.apache.org/log4net/ ) and NSpring Logging ( http://sourceforge.net/projects/nspring )

Both offer capabilities like rolling files based on date and buffered output as well as multiple output streams.  I just finished a project that uses NSpring to simultaneous log to Console, Debug Console, Files, Event Logs and Telnet sessions based on various criteria of the message.
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by:sachiek
ID: 12213992
CreateLogFiles.cs

using System;
using System.IO;
using System.Text;

namespace CreateLogFiles
{
      public class CreateLogFiles
      {
            private string sLogFormat;
            private string sErrorTime;

            public CreateLogFiles()
            {
                  //sLogFormat used to create log files format :
                  // dd/mm/yyyy hh:mm:ss AM/PM ==> Log Message
                  sLogFormat = DateTime.Now.ToShortDateString().ToString()+" "+DateTime.Now.ToLongTimeString().ToString()+" ==> ";
                  
                  //this variable used to create log filename format "
                  //for example filename : ErrorLogYYYYMMDD
                  string sYear      = DateTime.Now.Year.ToString();
                  string sMonth      = DateTime.Now.Month.ToString();
                  string sDay      = DateTime.Now.Day.ToString();
                  sErrorTime = sYear+sMonth+sDay;
            }

            public void ErrorLog(string sPathName, string sErrMsg)
            {
                  StreamWriter sw = new StreamWriter(sPathName+sErrorTime,true);
                  sw.WriteLine(sLogFormat + sErrMsg);
                  sw.Flush();
                  sw.Close();
            }
      }
}


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Accepted Solution

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sachiek earned 250 total points
ID: 12213995
CreateLogFiles.aspx

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.IO;
using System.Text;

namespace CreateLogFiles
{
      /// <summary>
      /// Summary description for CreateLogFiles1.
      /// </summary>
      public class CreateLogFiles1 : System.Web.UI.Page
      {
            protected System.Web.UI.WebControls.Label Label1;
            protected System.Web.UI.WebControls.TextBox TxtFilename;
            protected System.Web.UI.WebControls.Button BtnFind;
            protected System.Web.UI.WebControls.Label Msg;
      
            private void Page_Load(object sender, System.EventArgs e)
            {
                  // Put user code to initialize the page here
            }

            #region Web Form Designer generated code
            override protected void OnInit(EventArgs e)
            {
                  //
                  // CODEGEN: This call is required by the ASP.NET Web Form Designer.
                  //
                  InitializeComponent();
                  base.OnInit(e);
            }
            
            /// <summary>
            /// Required method for Designer support - do not modify
            /// the contents of this method with the code editor.
            /// </summary>
            private void InitializeComponent()
            {    
                  this.BtnFind.Click += new System.EventHandler(this.BtnFind_Click);
                  this.Load += new System.EventHandler(this.Page_Load);

            }
            #endregion

            private void BtnFind_Click(object sender, System.EventArgs e)
            {
                  try
                  {
                        StreamReader sr = new StreamReader(this.TxtFilename.Text);
                        sr.Read();
                        sr.Close();
                        Msg.Visible = true;
                        Msg.Text = "File "+ this.TxtFilename.Text +" was found";
                  }
                  catch(Exception ex)
                  {
                        CreateLogFiles Err = new CreateLogFiles();
                        Err.ErrorLog(Server.MapPath("Logs/ErrorLog"),ex.Message);
                        Msg.Visible = true;
                        Msg.Text = "Fatal error : "+ ex.Message + ", please find a complete error at ErrorLog file";
                  }
            }
      }
}

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Expert Comment

by:sachiek
ID: 12214001
Note: Create a folder called "Logs" to test this application in under the path which you are saving your project.

Hope you got it right.

Cheers!
Sachi
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