C#: Log file append size limit, create new and name by datetime ???

The following excellent code was provided to me my EE 'eternal 21'..... It records data bytes line-by-line very nicely.......

Q. How can I limit the log file size and create a new file with a slightly different name (timedate, etc...)???

byte[] newLine = System.Text.ASCIIEncoding.ASCII.GetBytes(Environment.NewLine);

fs = new FileStream("SyslogTest.txt", FileMode.Append, FileAccess.Write, FileShare.Read);
using(fs)
{
Byte[] sendBytes = Encoding.ASCII.GetBytes(machineName + str);
fs.Write(sendBytes, 0, sendBytes.Length);
fs.Write(newLine, 0, newLine.Length);
}

kvnsdr

Asked: 2004-10-01

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1 Solution

LVL 8

Razzie_Commented: 2004-10-01

Have a look at http://www.experts-exchange.com/Programming/Programming_Languages/C_Sharp/Q_21120146.html

Once you detected that a file is too long, you can easily create new logfile using the old filename and add '_2' to the name, or use a date.

HTH,

Razzie

LVL 1

kvnsdrAuthor Commented: 2004-10-01

The following code (above link) deletes the original file by name and creates a file. However, the file will have a different name each time, so "log.txt" will be a variable not a constant.

string fileName = "log.txt";
FileStream fs = new FileStream(fileName,FileMode.Open);
int length = fs.Length;
if(length > 500)
{
File.Delete(fileName);
}
if(File.Exists = false) // After deleting the file u can recreate a file with the same name
{
filestream = File.Create(fileName);
}

LVL 71

Éric MoreauSenior .Net ConsultantCommented: 2004-10-01

What I do most of the time is to add yyyyMM to the filename so each month, a new file is created. In my case, I don't have size problem within a month.

LVL 1

kvnsdrAuthor Commented: 2004-10-01

I'm getting a lot of advice, but will anyone help me with the actual code??? I need to create a new log file after the current one reaches either a specific size or by date. The file grows so fast that creating a new file each day will probably work fine...... Below is the actual log writing code......

Here's my first posting........

The following excellent code was provided to me my EE 'eternal 21'..... It records data bytes line-by-line very nicely.......

Q. How can I limit the log file size and create a new file with a slightly different name (timedate, etc...)???

byte[] newLine = System.Text.ASCIIEncoding.ASCII.GetBytes(Environment.NewLine);

fs = new FileStream("SyslogTest.txt", FileMode.Append, FileAccess.Write, FileShare.Read);
using(fs)
{
Byte[] sendBytes = Encoding.ASCII.GetBytes(machineName + str);
fs.Write(sendBytes, 0, sendBytes.Length);
fs.Write(newLine, 0, newLine.Length);
}

LVL 3

a_goatCommented: 2004-10-03

System.IO.StreamWriter LogWriter = new System.IO.StreamWriter(new FileStream("SyslogTest_0.txt", FileMode.Append, FileAccess.Write, FileShare.Read));

int DataSize = 0;
int FileCount = 1;
const int MAX_FILE_SIZE = 1000000 // One Meg

public void Log (string Data)
{
DataSize += Data.Length;
if (DataSize > MAX_FILE_SIZE)
{
DataSize = Data.Length;
LogWriter.Close();
LogWriter = new System.IO.StreamWriter(new FileStream(string.Format("SyslogTest_{0}.txt", FileCount++), FileMode.Append, FileAccess.Write, FileShare.Read));
}
LogWriter.WriteLine(Data);
}

BTW, eternal21's answer can be shortened to

System.IO.StreamWriter lw = new System.IO.StreamWriter(new FileStream("SyslogTest.txt", FileMode.Append, FileAccess.Write, FileShare.Read));

lw.WriteLine(machineName + str);

Far more efficient and cleaner

Also,
http://www.experts-exchange.com/Programming/Programming_Languages/C_Sharp/Q_21154056.html The suggestions in there deal with this as well.

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C#: Log file append size limit, create new and name by datetime ???

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