FileInfo - WriteAllLines
Creates a new file, write the specified string array to the file, and then closes the file.
public static string FileName = "test.txt"; public static void Main() { string [] lines = {"<!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>"}; // C# Extension Method: FileInfo - WriteAllLines FileName.ToFileInfo().WriteAllLines(lines); // C# Extension Method: FileInfo - ReadAllLines var allLines = FileName.ToFileInfo().ReadAllLines(); foreach(string line in allLines) { Console.WriteLine(line); } }
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using System; using System.Collections.Generic; using System.IO; using System.Text; public static partial class Extensions { /// <summary> /// Creates a new file, write the specified string array to the file, and then closes the file. /// </summary> /// <param name="this">The file to write to.</param> /// <param name="contents">The string array to write to the file.</param> /// ### /// <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"> /// Either <paramref name="this" /> or /// <paramref name="contents" /> 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.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 void WriteAllLines(this FileInfo @this, String[] contents) { File.WriteAllLines(@this.FullName, contents); } /// <summary> /// Creates a new file, writes the specified string array to the file by using the specified encoding, and then /// closes the file. /// </summary> /// <param name="this">The file to write to.</param> /// <param name="contents">The string array to write to the file.</param> /// <param name="encoding"> /// An <see cref="T:System.Text.Encoding" /> object that represents the character encoding /// applied to the string array. /// </param> /// ### /// <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"> /// Either <paramref name="this" /> or /// <paramref name="contents" /> 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.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 void WriteAllLines(this FileInfo @this, String[] contents, Encoding encoding) { File.WriteAllLines(@this.FullName, contents, encoding); } /// <summary> /// Creates a new file, write the specified string array to the file, and then closes the file. /// </summary> /// <param name="this">The @this to act on.</param> /// <param name="contents">The string array to write to the file.</param> public static void WriteAllLines(this FileInfo @this, IEnumerable<String> contents) { File.WriteAllLines(@this.FullName, contents); } /// <summary> /// Creates a new file, writes the specified string array to the file by using the specified encoding, and then /// closes the file. /// </summary> /// <param name="this">The @this to act on.</param> /// <param name="contents">The string array to write to the file.</param> /// <param name="encoding"> /// An <see cref="T:System.Text.Encoding" /> object that represents the character encoding /// applied to the string array. /// </param> public static void WriteAllLines(this FileInfo @this, IEnumerable<String> contents, Encoding encoding) { File.WriteAllLines(@this.FullName, contents, encoding); } }