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annotate MetroWpf/MetroWpf.Framework/Extensions/TextReaderExtensions.cs @ 60:fc62c971a117

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author Steven Hollidge <stevenhollidge@hotmail.com>
date Sat, 21 Apr 2012 21:19:39 +0100
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15
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1 using System;
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2 using System.Collections.Generic;
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3 using System.IO;
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4
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5 namespace MetroWpf
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6 {
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7 /// <summary>
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8 /// Extension methods for the TextReader class and its sub classes (StreamReader, StringReader)
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9 /// </summary>
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10 public static class TextReaderExtensions
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11 {
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12 #region · Extensions ·
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13
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14 /// <summary>
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15 /// The method provides an iterator through all lines of the text reader.
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16 /// </summary>
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17 /// <param name="reader">The text reader.</param>
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18 /// <returns>The iterator</returns>
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19 /// <example>
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20 /// <code>
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21 /// using(var reader = fileInfo.OpenText()) {
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22 /// foreach(var line in reader.IterateLines()) {
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23 /// // ...
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24 /// }
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25 /// }
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26 /// </code></example>
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27 /// <remarks>Contributed by OlivierJ</remarks>
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28 public static IEnumerable<string> IterateLines(this TextReader reader)
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29 {
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30 string line = null;
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31
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32 while ((line = reader.ReadLine()) != null)
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33 {
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34 yield return line;
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35 }
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36 }
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37
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38 /// <summary>
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39 /// The method executes the passed delegate /lambda expression) for all lines of the text reader.
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40 /// </summary>
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41 /// <param name="reader">The text reader.</param>
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42 /// <param name="action">The action.</param>
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43 /// <example>
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44 /// <code>
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45 /// using(var reader = fileInfo.OpenText()) {
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46 /// reader.IterateLines(l => Console.WriteLine(l));
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47 /// }
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48 /// </code></example>
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49 /// <remarks>Contributed by OlivierJ</remarks>
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50 public static void IterateLines(this TextReader reader, Action<string> action)
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51 {
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52 foreach (var line in reader.IterateLines())
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53 {
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54 action(line);
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55 }
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56 }
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57
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58 #endregion
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59 }
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60 }