WebBy repeatedly executing ReadLine within a while loop, you can count the lines with an incrementing variable, as in the following sample code: int count = 0; using (StreamReader reader = File.OpenText (@"c:\Test\TextFile.txt")) { while (reader.ReadLine () != null) { count++; } } 24 June 2010 WebAug 2, 2024 · Imagine a scenario where we have to process or store contents of a large character separated values file in a database. I had a large .CSV file with 9-12 million rows, the file size was around 700-800 MB. Initially, I had tried GenericParser, CsvHelper and a few other things but ended up with an out of memory or a very slow solution.
C# StreamReader Examples - Dot Net Perls
Web我有一個包含用戶記錄的文本文件。在文本文件中,三行文本文件中存在一個用戶記錄。現在根據我的要求,我必須讀取一個用戶的前三行,對其進行處理並插入數據庫,然后插入數據庫第三行給第二位用戶,依此類推。 這是我用於從文本文件中單行讀取的代碼。 WebFeb 21, 2012 · which defines a new class which allows you to enumerate over streams, then your counting code can look like this: StreamEnumerator chars = new … solidity inheritance constructor
[Solved] Reading an empty text file problem - CodeProject
WebJul 18, 2024 · using (var reader = new StreamReader ("")) { var lines = new List (); while (!reader.EndOfStream) { var line = reader.ReadLine (); if (LineIsWanted (line)) lines.Add (line); }; var actualLines = lines.Take (lines.Count - 4); }; ReadAllLines is a lot cleaner in my opinion. You could get fancy here if you wanted. WebJan 4, 2024 · The ReadLine method reads a line of characters from the current stream and returns the data as a string. It returns null if the end of the input stream is reached. Program.cs var fileName = "thermopylae.txt"; using var sr = new StreamReader (fileName); string? line; while ( (line = sr.ReadLine ()) != null) { Console.WriteLine (line); } WebJan 10, 2013 · private static int countFileLines (string filePath) { using (StreamReader r = new StreamReader (filePath)) { int i = 0; while (r.ReadLine () != null) { i++; } return i; } } … solidity house