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Re #18 - Migrate XML handling methods to core utils * Add methods to get an attribute value as an integer or double to core
author IBBoard <dev@ibboard.co.uk>
date Sat, 28 Mar 2009 20:35:43 +0000
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children 148edabc9c73
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23:fb4fdab841db 24:5cbf8bbf9b05
1 // This file (XmlTools.cs) is a part of the IBBoard library and is copyright 2009 IBBoard
2 //
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.
4 //
5
6 using System;
7
8 namespace IBBoard.Xml
9 {
10 /// <summary>
11 /// Some basic tools for handling XML files and retrieving their values
12 /// </summary>
13 public class XmlTools
14 {
15 /// <summary>
16 /// Gets the value of an attribute of an element as an integer. Throws a FormatException if the attribute is not an integer.
17 /// </summary>
18 /// <param name="elem">
19 /// The <see cref="XmlElement"/> to get the attribute value of
20 /// </param>
21 /// <param name="attributeName">
22 /// The name of the attribute to get as an integer
23 /// </param>
24 /// <returns>
25 /// The value of the attribute as an integer
26 /// </returns>
27 public static int GetIntValueFromAttribute(XmlElement elem, string attributeName)
28 {
29 try
30 {
31 return int.Parse(elem.GetAttribute(attributeName));
32 }
33 catch(FormatException)
34 {
35 throw new FormatException(String.Format("Attribute '{0}' of {1} with ID {2} was not a valid number", attributeName, elem.Name, elem.GetAttribute("id")));
36 }
37 }
38
39 /// <summary>
40 /// Gets the value of an attribute of an element as a double. Throws a FormatException if the attribute is not a double.
41 /// </summary>
42 /// <param name="elem">
43 /// The <see cref="XmlElement"/> to get the attribute value of
44 /// </param>
45 /// <param name="attributeName">
46 /// The name of the attribute to get as a double
47 /// </param>
48 /// <returns>
49 /// The value of the attribute as an double
50 /// </returns>
51 private double GetDoubleValueFromAttribute(XmlElement elem, string attributeName)
52 {
53 double doubleVal = double.NaN;
54 string attribValue = elem.GetAttribute(attributeName);
55
56 if (attribValue == "INF")
57 {
58 doubleVal = double.PositiveInfinity;
59 }
60 else
61 {
62 try
63 {
64 return int.Parse(attribValue);
65 }
66 catch(FormatException)
67 {
68 throw new FormatException(String.Format("Attribute '{0}' of {1} with ID {2} was not a valid number", attributeName, elem.Name, elem.GetAttribute("id")));
69 }
70 }
71
72 return doubleVal;
73 }
74 }
75 }