Volkan Nazmi Metin

Event Viewer Logging via .NET EventLog

April 11, 2013 in .NET, C#

Logged records are hold by windows default Event Viewer. If you want to have an appropriate source location at Event Viewer, than you need to open Event Viewer under Administative Tools and manually create it.

Below class implementation can store your exceptions and informations using EventLog object of .NET Framework

public static class Log
{
    public static string LogName
    {
        get
        {
            string logName = ConfigurationManager.AppSettings["LogName"];
            return logName == null ? "My APP" : logName;
        }
    }

    public static void WriteTraceLog(string message)
    {
        EventLog appLog = CreateEventLog(LogName);
        appLog.WriteEntry(message, EventLogEntryType.Information);
    }

    public static void WriteExceptionLog(Exception ex)
    {
        EventLog appLog = CreateEventLog(LogName);
        appLog.WriteEntry(ex.Message + "\r\n=== Stack Trace ===\r\n" + ex.StackTrace, EventLogEntryType.Error);
        if (ex.InnerException != null)
        {
            WriteExceptionLog(ex.InnerException);
        }
    }

    private static EventLog CreateEventLog(string logName)
    {
        EventLog appLog = new EventLog(logName);
        appLog.Source = logName;

        if (!EventLog.SourceExists(appLog.Source))
            EventLog.CreateEventSource(appLog.Source, logName);
        return appLog;
    }
}

public static class Log

{

public static string LogName

{

get

{

string logName = ConfigurationManager.AppSettings["LogName"];

return logName == null ? "My APP" : logName;

}

public static void WriteTraceLog(string message)

{

EventLog appLog = CreateEventLog(LogName);

appLog.WriteEntry(message, EventLogEntryType.Information);

}

public static void WriteExceptionLog(Exception ex)

{

EventLog appLog = CreateEventLog(LogName);

appLog.WriteEntry(ex.Message + "\r\n=== Stack Trace ===\r\n" + ex.StackTrace, EventLogEntryType.Error);

if (ex.InnerException != null)

{

WriteExceptionLog(ex.InnerException);

}

private static EventLog CreateEventLog(string logName)

{

EventLog appLog = new EventLog(logName);

appLog.Source = logName;

if (!EventLog.SourceExists(appLog.Source))

EventLog.CreateEventSource(appLog.Source, logName);

return appLog;

}

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Downloading File via FTPWebRequest

April 5, 2013 in .NET, C#

reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;

1	reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;

Again I will give the whole method for more clear understanding.

public static void Download(string file, string remoteDirectory, string destinationDirectory, string host, string user, string password)
{
    try
    {
        string uri = "ftp://" + host + "/" + remoteDirectory + "/" + file;
        Uri serverUri = new Uri(uri);
        if (serverUri.Scheme != Uri.UriSchemeFtp)
        {
            return;
        }
        FtpWebRequest reqFTP;
        reqFTP = (FtpWebRequest)FtpWebRequest.Create(serverUri);
        reqFTP.Credentials = new NetworkCredential(user, password);
        reqFTP.KeepAlive = false;
        reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;
        reqFTP.UseBinary = true;
        reqFTP.Proxy = null;
        reqFTP.UsePassive = false;
        FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
        Stream responseStream = response.GetResponseStream();
        CreateDirectory(destinationDirectory);
        FileStream writeStream = new FileStream(destinationDirectory + "\\" + file, FileMode.Create);
        int Length = 2048;
        Byte[] buffer = new Byte[Length];
        int bytesRead = responseStream.Read(buffer, 0, Length);
        while (bytesRead > 0)
        {
            writeStream.Write(buffer, 0, bytesRead);
            bytesRead = responseStream.Read(buffer, 0, Length);
        }
        writeStream.Close();
        response.Close();
    }
    catch (WebException wEx)
    {
        throw wEx;
    }
    catch (Exception ex)
    {
        throw ex;
    }
}

public static void Download(string file, string remoteDirectory, string destinationDirectory, string host, string user, string password)

{

try

{

string uri = "ftp://" + host + "/" + remoteDirectory + "/" + file;

Uri serverUri = new Uri(uri);

if (serverUri.Scheme != Uri.UriSchemeFtp)

{

return;

}

FtpWebRequest reqFTP;

reqFTP = (FtpWebRequest)FtpWebRequest.Create(serverUri);

reqFTP.Credentials = new NetworkCredential(user, password);

reqFTP.KeepAlive = false;

reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;

reqFTP.UseBinary = true;

reqFTP.Proxy = null;

reqFTP.UsePassive = false;

FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();

Stream responseStream = response.GetResponseStream();

CreateDirectory(destinationDirectory);

FileStream writeStream = new FileStream(destinationDirectory + "\\" + file, FileMode.Create);

int Length = 2048;

Byte[] buffer = new Byte[Length];

int bytesRead = responseStream.Read(buffer, 0, Length);

while (bytesRead > 0)

{

writeStream.Write(buffer, 0, bytesRead);

bytesRead = responseStream.Read(buffer, 0, Length);

}

writeStream.Close();

response.Close();

}

catch (WebException wEx)

{

throw wEx;

}

catch (Exception ex)

{

throw ex;

}

Now we have both a method for getting the filelist of a directory and also a method for downloading the file. So I guess, you already imagine what we can do with these two

Yes, download a whole directory…
Let’s see the small method using these two pretty ones.

public static void DownloadFolder(string sourceDirectory, string destinationDirectory, string host, string user, string password)
{
    try
    {
        string[] files = GetFileList(sourceDirectory, host, user, password);
        foreach (string file in files)
        {
            Download(file, sourceDirectory, destinationDirectory, host, user, password);
        }
    }
    catch(Exception ex)
    {
        throw ex;
    }
}

public static void DownloadFolder(string sourceDirectory, string destinationDirectory, string host, string user, string password)

{

try

{

string[] files = GetFileList(sourceDirectory, host, user, password);

foreach (string file in files)

{

Download(file, sourceDirectory, destinationDirectory, host, user, password);

}

catch(Exception ex)

{

throw ex;

}

Again please provide feedback via comment. Every comment will be taken seriously if they are not like spam.

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Getting File List via FTPWebRequest

April 5, 2013 in .NET, C#

After this article, I will also provide the way to download the files. As you will directly notice that it is totally independent class to do its own work only. Nothing more, nothing less.

Without going too much details, I will provide the code as below. Please do not hesitate to make any suggestions or comments related to the code.

public static string[] GetFileList(string sourceFolder, string host, string user, string password) {
    StringBuilder result = new StringBuilder();
    WebResponse response = null;
    StreamReader reader = null;
    try
    {
        FtpWebRequest reqFTP;
        reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + host + "/" + sourceFolder + "/"));
        reqFTP.UseBinary = true;
        reqFTP.Credentials = new NetworkCredential(user, password);
        reqFTP.Method = WebRequestMethods.Ftp.ListDirectory;
        reqFTP.Proxy = null;
        reqFTP.KeepAlive = false;
        reqFTP.UsePassive = false;
        response = reqFTP.GetResponse();
        reader = new StreamReader(response.GetResponseStream());
        string line = reader.ReadLine();
        while (line != null)
        {
            result.Append(line);
            result.Append("\n");
            line = reader.ReadLine();
        }
        if (result.ToString() != String.Empty)
        {
            result.Remove(result.ToString().LastIndexOf('\n'), 1);
            return result.ToString().Split('\n');
        }
        return new string[0];
    }
    catch (Exception ex)
    {
        if (reader != null)
        {
            reader.Close();
        }
        if (response != null)
        {
            response.Close();
        }
        throw ex;
    }
}

public static string[] GetFileList(string sourceFolder, string host, string user, string password) {

StringBuilder result = new StringBuilder();

WebResponse response = null;

StreamReader reader = null;

try

{

FtpWebRequest reqFTP;

reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + host + "/" + sourceFolder + "/"));

reqFTP.UseBinary = true;

reqFTP.Credentials = new NetworkCredential(user, password);

reqFTP.Method = WebRequestMethods.Ftp.ListDirectory;

reqFTP.Proxy = null;

reqFTP.KeepAlive = false;

reqFTP.UsePassive = false;

response = reqFTP.GetResponse();

reader = new StreamReader(response.GetResponseStream());

string line = reader.ReadLine();

while (line != null)

{

result.Append(line);

result.Append("\n");

line = reader.ReadLine();

}

if (result.ToString() != String.Empty)

{

result.Remove(result.ToString().LastIndexOf('\n'), 1);

return result.ToString().Split('\n');

}

return new string[0];

}

catch (Exception ex)

{

if (reader != null)

{

reader.Close();

}

if (response != null)

{

response.Close();

}

throw ex;

}

Upon suggestion of my friend, I will provide a small code that consumes the above method but runs asynchroniously. But since the async and await is supported at .NET 4.5 please proceed with caution.

public async Task<string[]> GetFileListAsync(string sourceFolder, string host, string user, string password)
{
    return await Task<string[]>.Factory.StartNew(() =>
    {
        return GetFileList(sourceFolder, host, user, password);
    });
}

public async void UseMethodAsync()
{
    string[] result = await GetFileListAsync("source", "host", "user", "password");
}

public async Task<string[]> GetFileListAsync(string sourceFolder, string host, string user, string password)

{

return await Task<string[]>.Factory.StartNew(() =>

{

return GetFileList(sourceFolder, host, user, password);

});

}

public async void UseMethodAsync()

{

string[] result = await GetFileListAsync("source", "host", "user", "password");

}

Tags: C#, FTP, FTPWebRequest
4 Comments »

Email Sender via .NET

March 11, 2013 in C#

Just another reusable code for sending an e-mail. I hope no introduction required. If so don’t hesitate to comment. An email sender that is using SMTPClient of .NET

public class EmailHelper
{
    const char emailSplitter = ',';     
    public static void Email(string toAddress, string fromAddress, string subject, string attachmentFile, string smtphost, int port)
    {
        string[] emails = toAddress.Split(new char[] { emailSplitter }, StringSplitOptions.RemoveEmptyEntries);
        if (emails.Length > 1)
        {
            foreach (var email in emails)
            {
                Email(email.Trim(), fromAddress, subject, attachmentFile, smtphost, port);
                Thread.Sleep(1000);
            }
            return;
        }
        MailMessage message = new MailMessage();
        message.To.Add(new MailAddress(toAddress));
        message.Subject = subject;
        message.From = new MailAddress(fromAddress);
        message.Body = subject;
        if (File.Exists(attachmentFile))
        {
            message.Attachments.Add(new Attachment(attachmentFile));
        }
        SmtpClient smtp = new SmtpClient(smtphost, port);
        smtp.Credentials = CredentialCache.DefaultNetworkCredentials;
        smtp.Send(message);
    }
}

public class EmailHelper

{

const char emailSplitter = ',';

public static void Email(string toAddress, string fromAddress, string subject, string attachmentFile, string smtphost, int port)

{

string[] emails = toAddress.Split(new char[] { emailSplitter }, StringSplitOptions.RemoveEmptyEntries);

if (emails.Length > 1)

{

foreach (var email in emails)

{

Email(email.Trim(), fromAddress, subject, attachmentFile, smtphost, port);

Thread.Sleep(1000);

}

return;

}

MailMessage message = new MailMessage();

message.To.Add(new MailAddress(toAddress));

message.Subject = subject;

message.From = new MailAddress(fromAddress);

message.Body = subject;

if (File.Exists(attachmentFile))

{

message.Attachments.Add(new Attachment(attachmentFile));

}

SmtpClient smtp = new SmtpClient(smtphost, port);

smtp.Credentials = CredentialCache.DefaultNetworkCredentials;

smtp.Send(message);

}

Tags: E-mail, Email, SMTP
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Week Start and Week End Calculation

March 11, 2013 in C#

Just to be a reusable code. Inserting it as below. I guess pretty clear enough, who knows C#. C# calendar week number is the input and the outputs are the start and end date of that week.

Basically calculates the start and end date of the week for a given weeknumber + year;

public class CalendarHelper
{
    /// <summary>
    /// Calculates start and end date of a week for a specific year.
    /// </summary>
    /// <param name="year">Year</param>
    /// <param name="week">Week number</param>
    /// <param name="startDate">Calculated start date of week</param>
    /// <param name="endDate">Calculated end date of week</param>
    public static void StartEndDateOfWeek(int year, int week, out DateTime startDate, out DateTime endDate)
    {
        // First of January
        DateTime jan1 = new DateTime(year, 1, 1);

        // Calculation is done according to the first day of week is monday but includes the offset,
        // so it will be correct for sunday and other first day of week.
        int daysOffset = (int)CultureInfo.CurrentCulture.DateTimeFormat.FirstDayOfWeek - (int)jan1.DayOfWeek;
        DateTime firstMonday = jan1.AddDays(daysOffset);

        // Find the first week.
        int firstWeek = CultureInfo.CurrentCulture.Calendar.GetWeekOfYear(jan1, CultureInfo.CurrentCulture.DateTimeFormat.CalendarWeekRule,
            CultureInfo.CurrentCulture.DateTimeFormat.FirstDayOfWeek);

        if (firstWeek <= 1)
        {
            week -= 1;
        }
        startDate = firstMonday.AddDays(week * 7);
        endDate = startDate.AddDays(6);            
    }
}

public class CalendarHelper

{

/// <summary>

/// Calculates start and end date of a week for a specific year.

/// </summary>

/// <param name="year">Year</param>

/// <param name="week">Week number</param>

/// <param name="startDate">Calculated start date of week</param>

/// <param name="endDate">Calculated end date of week</param>

public static void StartEndDateOfWeek(int year, int week, out DateTime startDate, out DateTime endDate)

{

// First of January

DateTime jan1 = new DateTime(year, 1, 1);

// Calculation is done according to the first day of week is monday but includes the offset,

// so it will be correct for sunday and other first day of week.

int daysOffset = (int)CultureInfo.CurrentCulture.DateTimeFormat.FirstDayOfWeek - (int)jan1.DayOfWeek;

DateTime firstMonday = jan1.AddDays(daysOffset);

// Find the first week.

int firstWeek = CultureInfo.CurrentCulture.Calendar.GetWeekOfYear(jan1, CultureInfo.CurrentCulture.DateTimeFormat.CalendarWeekRule,

CultureInfo.CurrentCulture.DateTimeFormat.FirstDayOfWeek);

if (firstWeek <= 1)

{

week -= 1;

}

startDate = firstMonday.AddDays(week * 7);

endDate = startDate.AddDays(6);

}

Tags: C#, Calendar, Week Number
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Coming back to your previous Company

March 11, 2013 in Career

After taking over some management resposibilities, I am encountring different things that I had never think of. Teoretically I am not a fun of any company in principal and people can choose to start as an employee of a company or resign of his job. There is nothing wrong with that. But, since you have some reasons to search for a job and thinking on resigning than this reasons should have a solid base. Otherwise, both ethically and professionally this doesn’t make sense, cause starting a new job and be known and approved by your new company takes time. On the other hand, nowadays I hear/experience that people are going back to their previous employers.

Question 1 : Didn’t you experience bad past with that company and you resign?
Question 2 : Aren’t your reasons solid enough so that you are going back?

Personally a career with your previous company is harder than a not known one. You know the things that are not going well, you know the people and in most cases these didn’t change. So is it the money they offered or you decided that you made a wrong decision?

Please provide me your comments, cause as a logical guy, I cannot find a satifying answer.

Tags: Company, Previous
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Moving Blog To WordPress + English

March 8, 2013 in Blog

I have moved my blog to a wordpress base. Also decided to share my experience in English. When I started blogging WordPress was not that powerful and customizable enough, but now I see that it is hugely improved. Not only a blog engine but a powerful CMS.

If you want to access my old blog please click here.. Keep in mind that it is Turkish.

Mainly I started writing Turkish but after a while most of the traffic is also coming outside of Turkey. So as a result, I wanted to switch to a comman language.

The topic is same as before.. My development problem solutions that I or together as a team has experienced.

I will be sharing them for you and also for me. This topic would be meaningless cause I am going to remove the link when I completed to convert the whole articles into English. Also if you want me to continue more efficient to write valuable content, please click the ads once in a while and buy me a beer

Tags: Blog, English, Turkish, Wordpress
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Event Viewer Logging via .NET EventLog

Downloading File via FTPWebRequest

Getting File List via FTPWebRequest

Event Viewer Logging via .NET EventLog

Downloading File via FTPWebRequest

Getting File List via FTPWebRequest

Email Sender via .NET

Week Start and Week End Calculation

Coming back to your previous Company

Moving Blog To WordPress + English

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