Read large files in C#

Question

Hi I am having 700MB text file and I want to read the contents from the file. Which is best way to read the large files in c# ? Regards Murali

FireMyst · Answer

I know this question is answered already but here's a blog which benchmarks 9 common techniques to determine the fastest way. Definitely worth a look for those interested in the fastest way: http://blogs.davelozinski.com/curiousconsultant/csharp-net-fastest-way-to-read-text-files _

Felipe Ramos · Answer

I would said that its influence on how you need that data processed. The System.IO namespace exposes a couple of classes that you can use. In one of my projects I use the StreamReader and read each line of the file because it is a fixed width file that needs to be converted into an object. ex: using (StreamReader streamReader = new StreamReader(FilePath)) { while (m_streamReader.Peek() > 0) { string line = streamReader.ReadLine(); } } For files over 500mb this works fine. You can also use the StringReader or BinaryReader if you need to. http://www.c-sharpcorner.com/UploadFile/mahesh/2435/Default.aspx