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# C# Exporting text to CSV(or Excel)

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5 replies to this topic

Posted 05 April 2012 - 04:19 PM

Hey everybody,

I was hoping to get a little help on a data exporter here. I'm reading files from a delimited txt log and need to export it to a CSV file. The problem I'm having is how to get the data I need from the log. The txt files resemble this:

[Date] - [some system info] - [some system state]
[Date] - [Athenticate] - [some system state]
[Date] - [some system info] - [some system state]

I need to only grab the Athenticates in the file and export those to a CSV. Sadly I'm not to fluent in C#. What whould be the best way to go about this? I have no problem reading the file and I shouldnt have any problem exporting but how do I handle only collecting the ata I need from the file? A List maybe? or a 2-D array?

### #2Telastyn  Members

Posted 05 April 2012 - 04:52 PM

How big is the file?

System.IO.File has ReadAllLines and WriteAllLines. Super easy if your file isn't huge.

Posted 05 April 2012 - 05:01 PM

They can vary. Some as small as a few KB, others can get kinda large. I need to find a way to check that 2nd part of the file to see if it will be added or not.

### #4ApochPiQ  Moderators

Posted 05 April 2012 - 05:04 PM

Screw writing your own tool. Just use sed or something similar.

I'm dead serious. It was literally designed to do this kind of thing.
Wielder of the Sacred Wands

Posted 05 April 2012 - 05:06 PM

You need to define a grammar for both your log file input and your csv output. This might be over engineering the problem though. You could also define a regular expression and use matching to pull out the desired data.

Posted 05 April 2012 - 05:38 PM

I think I may of found a way, I checked out those links Adam, and I needed something like Matching. Though again, not very fluent in C# still, I kinda implemented it my own way. Heres what I have to know that it works, I have 2 lists, one that delimits part by part and if the part matches with the Authenticate info the 2nd list stores the line. I applied these to listboxes to test, but now I just need to delimit the line to stick in colums and rows in the CSV and it should work

public  void ReadTextFile(string fileName)
{
List<string> sepList = new List<string>();
string line;

// Read the file and display it line by line.
{
while ((line = file.ReadLine()) != null)
{

char[] delimiters = new char[] { '-',',' };
string[] parts = line.Split(delimiters, StringSplitOptions.RemoveEmptyEntries);

for (int i = 0; i < parts.Length; i++)
{
Console.WriteLine(parts[i]);

if (parts[i].ToString() == " [Authenticate info]")
{

}

}
}
listBox1.DataSource = sepList;
}