FileInfo - CountLines
Gets the total number of lines in a file.
public static string FileName = "test.txt"; public static void Main() { SaveFile(); // C# Extension Method: FileInfo - CountLines var count = FileName.ToFileInfo().CountLines(); Console.WriteLine("Number of lines: {0}", count); } private static void SaveFile() { var html = @"<!DOCTYPE html> <html> <body> <h1>This is <b>bold</b> heading</h1> <p>This is <u>underlined</u> paragraph</p> <h2>This is <i>italic</i> heading</h2> </body> </html> "; html.SaveAs(FileName); }
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using System; using System.IO; using System.Linq; public static partial class Extensions { /// <summary>Gets the total number of lines in a file. </summary> /// <param name="this">The file to perform the count on.</param> /// <returns>The total number of lines in a file. </returns> public static int CountLines(this FileInfo @this) { return File.ReadAllLines(@this.FullName).Length; } /// <summary>Gets the total number of lines in a file that satisfy the condition in the predicate function.</summary> /// <param name="this">The file to perform the count on.</param> /// <param name="predicate">A function to test each line for a condition.</param> /// <returns>The total number of lines in a file that satisfy the condition in the predicate function.</returns> public static int CountLines(this FileInfo @this, Func<string, bool> predicate) { return File.ReadAllLines(@this.FullName).Count(predicate); } }