C# Exporting text to CSV(or Excel)

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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?

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How big is the file?

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

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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.

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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.

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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.

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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> toAdd = new List<string>(); List<string> sepList = new List<string>(); string line; // Read the file and display it line by line. using (StreamReader file = new StreamReader(fileName)) { 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); if (parts.ToString() == " [Authenticate info]") { sepList.Add(parts); toAdd.Add(line); } } } listBox1.DataSource = sepList; listBox2.DataSource = toAdd; file.Close(); }

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