ASP.NET Hosting

ASP.NET Tutorial: Knowing and Comparing Log File

Suzan Kara

1. Logging in ExceptionLogging.cs

public static void Threeparameter(string req, string res, string rest)
{
    var line = Environment.NewLine + Environment.NewLine;

    try
    {
        string filepath = HttpContext.Current.Server.MapPath("~/testor/"); // Text File Path

        if (!Directory.Exists(filepath))
        {
            Directory.CreateDirectory(filepath);
        }

        filepath = filepath + DateTime.Today.ToString("dd-MM-yy") + ".txt"; // Text File Name

        if (!File.Exists(filepath))
        {
            File.Create(filepath).Dispose();
        }

        using (StreamWriter sw = File.AppendText(filepath))
        {
            string message = string.Format("Time: {0}", DateTime.Now.ToString("dd/MM/yyyy hh:mm:ss tt"));
            message += Environment.NewLine;
            message += "--------------------------API URL---------------------------------";
            message += Environment.NewLine;
            message += string.Format("{0}", rest);
            message += Environment.NewLine;
            message += "--------------------------Request Parameter---------------------------------";
            message += Environment.NewLine;
            message += string.Format("{0}", req);
            message += Environment.NewLine;
            message += Environment.NewLine;
            message += "--------------------------Response Parameter---------------------------------";
            message += Environment.NewLine;
            message += string.Format("{0}", res);
            message += Environment.NewLine;

            sw.WriteLine(message);
            sw.Flush();
            sw.Close();
        }
    }
    catch (Exception e)
    {
        e.ToString();
    }
}

public static void singleparamter(string resp)
{
    var line = Environment.NewLine + Environment.NewLine;

    try
    {
        string filepath = HttpContext.Current.Server.MapPath("~/testing/"); // Text File Path

        if (!Directory.Exists(filepath))
        {
            Directory.CreateDirectory(filepath);
        }

        filepath = filepath + "IPOMaster" + DateTime.Today.ToString("dd-MM-yy") + ".txt"; // Text File Name

        if (!File.Exists(filepath))
        {
            File.Create(filepath).Dispose();
        }

        using (StreamWriter sw = File.AppendText(filepath))
        {
            string message = Environment.NewLine;
            message += "DataTime: " + DateTime.Now.ToString("dd/MM/yyyy hh:mm:ss tt") + ", " + resp;
            message += Environment.NewLine;

            sw.WriteLine(message);
            sw.Flush();
            sw.Close();
        }
    }
    catch (Exception e)
    {
        e.ToString();
    }
}

Log Content

  • API URL
  • Request Parameter
  • Response Parameter

How to call the log?

Threeparameter("req value", "response value", "text");

singleparamter("Closed IPO");

File Name Format

DateTime.Today.ToString("dd-MM-yy") + ".txt";

2. Logging in iservices.svc.cs

public void WriteLog(string log)
{
    try
    {
        string filepath = System.Web.Hosting.HostingEnvironment.MapPath("~/folder/subfolder/");

        if (!Directory.Exists(filepath))
        {
            Directory.CreateDirectory(filepath);
        }

        StreamWriter sw = new StreamWriter(filepath + DateTime.Now.ToString("ddMMyy") + ".txt", true);

        sw.WriteLine(DateTime.Now.ToString() + " " + log);
        sw.WriteLine("---------------------------------------------------------------------------------------------------------");
        sw.Close();
    }
    catch (Exception ex)
    {
        string str = ex.ToString();
    }
}

3. Logging CSV in Executable

Location

source + "/File/"

File Name Format

"Face_" + DateTime.Now.ToString("ddMMyyyy_HHmm") + ".csv"

Purpose: To save data (probably biometric/face recognition data) in CSV format.

Key Features

  • Not a standard log, but structured data storage.
  • Ensures unique filenames with date + time format.
  • UTF-8 encoding ensures compatibility.

Summary Table

Logging Type File Name Pattern Log Folder Path Log Content Type Context
(Web) dd-MM-yy.txt ~/foldername/ API URL, Request, Response Web – Request Flow
(Web) filenamedd-MM-yy.txt ~/foldername/ Only Response Web – IPO Logs
(iservices.svc) ddMMyy.txt ~/foldername/subfoldername/ Single-line logs with a delimiter Web Services
(.exe) filename-MM-yy.txt /foldername/ Timestamp + Response Executable Component
CSV Export (.exe) filename_ddMMyyyy_HHmm.csv /foldername/ Structured CSV data Desktop Biometric Logs

Conclusion

Each logging method serves a unique purpose, depending on the module (Web or Executable) and type of data being logged (API flows, exceptions, biometric logs). This modular logging approach helps in efficient debugging, system auditing, and API behavior tracking.

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