C# writing to csv file

If you like, you could also specify your own culture, so instead of CultureInfo. This becomes especially relevant when reading in data, as you need the same CultureInfo to read it in which it was also written.

If we run this program, a CSV file named filePersons. In the picture above, we can see that the header names and order is exactly the same as how we defined them in our Person class. By annotating the properties in that class, we can change the outputted header name or the ordering, which works by annotating the properties by the Name or by the Index annotations:. By running the program again, our CSV file will change — both the ordering as well as the name of the Id property has changed:.

Of course, we can also decide to omit the headers altogether. In that case, we need to pass in a CsvConfiguration object while constructing our CsvWriter.

We have to pay attention that every time we run our program, the old CSV file is overwritten. Sometimes we would like that data to be appended at the end of a file, instead of overwriting existing data. Thank you. Perfect, simple code. Stephen Asher. Thanks for sharing. CSV Parser in. Net library Habeeb Matrix Nov Habeeb Matrix.

Nice article. The best I use is a csv parser built into. This is a hidden treasure inside Microsoft. VisualBasic namespace. Below is a sample code: using Microsoft.

ReadLine ; while! Nice, concise explanation and code MitchellBaldwin 6-May Very well done - thank you for taking the time to post your code and descriptive material here. The class was cut-and-paste simple to use and worked as advertised right out of the box. Vote of 5 in my book! It is possible to read only selected lines?

I have a huge file about MB. It takes about 1,, lines. I just want to read every hundredth row from file. Take 1. Thank You younismo Aug Thank You. That was helpful. Can someone comment on the differences between using this versus TextFieldParser? It's in the Microsoft. FileIO namespace but I assume you can still call it from C just as well. This lack of multi-line fields support. Re: My vote of 3 Jonathan Wood May The latest version supports multi-line fields.

You can find the new version in this article. Christian Rauchenwald. At first thanks for posting this, as it saved me some work.

Anyway I have a tiny issue. The problem is that writer. The CsvFileWriter class has a constructor that takes a Stream argument. So I would start by opening the output file yourself with the settings you want, and then passing the stream to the CsvFileWriter constructor. Pertti Palokangas.

Also, the base class StreamReader may take a second argument for the encoding you want. So try calling the base like this: : base stream, Encoding. UTF8 modified Mar am. Works Great! Code dropped right into my app with a few minor tweaks. I can now export map data as CSV. Thank you! Reading and writing csv files srvishnukumar Mar Hi Jonathan, Am very happy to get this article.. Flush ;. GetStri ng mem. ToArray ;. WriteLine result ;. WriteField "Customer" ;. WriteField "Title" ;.

WriteField "Deadline" ;. NextRecord ;. WriteField project. CustomerName ;. Title ;. Deadline ;. Create your playground on Tech.