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annotate Xml/XmlTools.cs @ 33:8971a1c48dbf

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Re #18 - Add rounding to half methods * Add Floor method that rounds down to a half * Add Ceiling method that rounds up to a half
author IBBoard <dev@ibboard.co.uk>
date Sun, 17 May 2009 19:22:53 +0000
parents 4ea1fc351533
children c71855e241fc
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1 // This file (XmlTools.cs) is a part of the IBBoard library and is copyright 2009 IBBoard
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2 //
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3 // The file and the library/program it is in are licensed under the GNU LGPL license, either version 3 of the License or (at your option) any later version. Please see COPYING.LGPL for more information and the full license.
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4 //
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5
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6 using System;
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7 using System.Xml;
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8
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9 namespace IBBoard.Xml
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10 {
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11 /// <summary>
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12 /// Some basic tools for handling XML files and retrieving their values
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13 /// </summary>
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14 public class XmlTools
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15 {
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16 /// <summary>
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17 /// Gets the value of an attribute of an element as a boolean. Throws a FormatException if the attribute is not a boolean.
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18 /// </summary>
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19 /// <param name="elem">
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20 /// The <see cref="XmlElement"/> to get the attribute value of
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21 /// </param>
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22 /// <param name="attributeName">
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23 /// The name of the attribute to get as a boolean
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24 /// </param>
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25 /// <returns>
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26 /// The value of the attribute as an boolean
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27 /// </returns>
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28 public static bool GetBoolValueFromAttribute(XmlElement elem, string attributeName)
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29 {
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30 try
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31 {
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32 return bool.Parse(elem.GetAttribute(attributeName));
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33 }
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34 catch(FormatException)
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35 {
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36 throw new FormatException(String.Format("Attribute '{0}' of {1} with ID {2} was not a valid boolean", attributeName, elem.Name, elem.GetAttribute("id")));
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37 }
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38 }
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39
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40 /// <summary>
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41 /// Gets the value of an attribute of an element as an integer. Throws a FormatException if the attribute is not an integer.
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42 /// </summary>
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43 /// <param name="elem">
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44 /// The <see cref="XmlElement"/> to get the attribute value of
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45 /// </param>
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46 /// <param name="attributeName">
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47 /// The name of the attribute to get as an integer
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48 /// </param>
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49 /// <returns>
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50 /// The value of the attribute as an integer
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51 /// </returns>
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52 public static int GetIntValueFromAttribute(XmlElement elem, string attributeName)
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53 {
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54 try
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55 {
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56 return int.Parse(elem.GetAttribute(attributeName));
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57 }
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58 catch(FormatException)
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59 {
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60 throw new FormatException(String.Format("Attribute '{0}' of {1} with ID {2} was not a valid number", attributeName, elem.Name, elem.GetAttribute("id")));
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61 }
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62 }
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63
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64 /// <summary>
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65 /// Gets the value of an attribute of an element as a double. Throws a FormatException if the attribute is not a double.
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66 /// </summary>
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67 /// <param name="elem">
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68 /// The <see cref="XmlElement"/> to get the attribute value of
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69 /// </param>
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70 /// <param name="attributeName">
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71 /// The name of the attribute to get as a double
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72 /// </param>
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73 /// <returns>
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74 /// The value of the attribute as an double
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75 /// </returns>
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76 public static double GetDoubleValueFromAttribute(XmlElement elem, string attributeName)
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77 {
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78 double doubleVal = double.NaN;
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79 string attribValue = elem.GetAttribute(attributeName);
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80
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81 if (attribValue == "INF")
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82 {
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83 doubleVal = double.PositiveInfinity;
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84 }
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85 else
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86 {
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87 try
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88 {
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89 return int.Parse(attribValue);
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90 }
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91 catch(FormatException)
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92 {
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93 throw new FormatException(String.Format("Attribute '{0}' of {1} with ID {2} was not a valid number", attributeName, elem.Name, elem.GetAttribute("id")));
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94 }
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95 }
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96
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97 return doubleVal;
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98 }
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99 }
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100 }