Understanding and Comparing Log File

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.