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home / developersection / forums / create log error file in asp.net
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Arti Mishra
Arti Mishra

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Arti Mishra
Arti Mishra 21 Oct 2018
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“Log file”
In any programming language for tracking our application performance as well as for maintaining the history of any bugs or error, we generally create a log file in any temporary folder. That helps us to
save our time for easily finding the bugs in a whole application.

Here is the simple example where we can create a log error file in ASP.NET programming language.

using System; 

using System.Collections.Generic; 

using System.IO; 

using System.Linq; 

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Text; 

using System.Threading.Tasks; 

using System.Globalization;

public partial class _Defaut:System.Web.UI.page

{

protect void page_load(object sender,EventArgs e)

{

try{

var i=10;

var j=0;

var result= i/j;

Responce.Write(result);

}

catch(Exception e){

lblMessage.Text=“Exception generated! Plz check your Log Error File”;

createLogErrorFile(e.ToString());

}

}

private void createLogErrorFile(String errMessage)
{
try{

string path=”~/”+DateTime.ToDay.ToString(“dd-mm-yy”)+”.txt”;

if(!File.Exists(System.Web.HttpContext.Current.Server.MathPath(path))

{

File.create(System.Web.HttpContext.Current.Server.MathPath(path)).close();

}

Using(StreamWriter w= File.AppenedText(System.Web.HttpContext.Current.Server.MathPath(path)))

w.WriteLine(“|n |n Log Entry : “);

w.WriteLine(“{0}”, DateTime.Now.ToString(CultureInfo.InvariantCulture));

String err=”Error in : “+System.Web.HttpContext.Current.Request.Url.ToString()+”|n |n Error Message : ”+ errMessage;

w.WriteLine(err);

W.WriteLine(“===========================================”);

w.Flush();

w.close();

}

catch{

throw;

}

}

}

Log File: 21-10-18.txt

Log Entry :
21/10/2018 11 : 37 : 15
Error In : ..........................................................
Error Message : ................................................
======================================.

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