FileInfo - ReadAllLines
Opens a text file, reads all lines of the file into a string array, and then closes the file.
public static string FileName = "test.txt"; public static void Main() { SaveFile(); // C# Extension Method: FileInfo - ReadAllLines var lines = FileName.ToFileInfo().ReadAllLines(); foreach(string line in lines) { Console.WriteLine(line); } } 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); }
View Source
using System; using System.IO; using System.Text; public static partial class Extensions { /// <summary> /// Opens a text file, reads all lines of the file, and then closes the file. /// </summary> /// <param name="this">The file to open for reading.</param> /// <returns>A string array containing all lines of the file.</returns> /// ### /// <exception cref="T:System.ArgumentException"> /// <paramref name="this" /> is a zero-length string, contains only /// white space, or contains one or more invalid characters as defined by /// <see /// cref="F:System.IO.Path.InvalidPathChars" /> /// . /// </exception> /// ### /// <exception cref="T:System.ArgumentNullException"> /// <paramref name="this" /> is null. /// </exception> /// ### /// <exception cref="T:System.IO.PathTooLongException"> /// The specified @this, file name, or both exceed the system- /// defined maximum length. For example, on Windows-based platforms, paths must be less than 248 characters, and file /// names must be less than 260 characters. /// </exception> /// ### /// <exception cref="T:System.IO.DirectoryNotFoundException"> /// The specified @this is invalid (for example, it is on /// an unmapped drive). /// </exception> /// ### /// <exception cref="T:System.IO.IOException">An I/O error occurred while opening the file.</exception> /// ### /// <exception cref="T:System.UnauthorizedAccessException"> /// <paramref name="this" /> specified a file that is /// read-only.-or- This operation is not supported on the current platform.-or- /// <paramref /// name="this" /> /// specified a directory.-or- The caller does not have the required permission. /// </exception> /// ### /// <exception cref="T:System.IO.FileNotFoundException"> /// The file specified in <paramref name="this" /> was not /// found. /// </exception> /// ### /// <exception cref="T:System.NotSupportedException"> /// <paramref name="this" /> is in an invalid format. /// </exception> /// ### /// <exception cref="T:System.Security.SecurityException">The caller does not have the required permission.</exception> public static String[] ReadAllLines(this FileInfo @this) { return File.ReadAllLines(@this.FullName); } /// <summary> /// Opens a file, reads all lines of the file with the specified encoding, and then closes the file. /// </summary> /// <param name="this">The file to open for reading.</param> /// <param name="encoding">The encoding applied to the contents of the file.</param> /// <returns>A string array containing all lines of the file.</returns> /// ### /// <exception cref="T:System.ArgumentException"> /// <paramref name="this" /> is a zero-length string, contains only /// white space, or contains one or more invalid characters as defined by /// <see /// cref="F:System.IO.Path.InvalidPathChars" /> /// . /// </exception> /// ### /// <exception cref="T:System.ArgumentNullException"> /// <paramref name="this" /> is null. /// </exception> /// ### /// <exception cref="T:System.IO.PathTooLongException"> /// The specified @this, file name, or both exceed the system- /// defined maximum length. For example, on Windows-based platforms, paths must be less than 248 characters, and file /// names must be less than 260 characters. /// </exception> /// ### /// <exception cref="T:System.IO.DirectoryNotFoundException"> /// The specified @this is invalid (for example, it is on /// an unmapped drive). /// </exception> /// ### /// <exception cref="T:System.IO.IOException">An I/O error occurred while opening the file.</exception> /// ### /// <exception cref="T:System.UnauthorizedAccessException"> /// <paramref name="this" /> specified a file that is /// read-only.-or- This operation is not supported on the current platform.-or- /// <paramref /// name="this" /> /// specified a directory.-or- The caller does not have the required permission. /// </exception> /// ### /// <exception cref="T:System.IO.FileNotFoundException"> /// The file specified in <paramref name="this" /> was not /// found. /// </exception> /// ### /// <exception cref="T:System.NotSupportedException"> /// <paramref name="this" /> is in an invalid format. /// </exception> /// ### /// <exception cref="T:System.Security.SecurityException">The caller does not have the required permission.</exception> public static String[] ReadAllLines(this FileInfo @this, Encoding encoding) { return File.ReadAllLines(@this.FullName, encoding); } }