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

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author Steven Hollidge <stevenhollidge@hotmail.com>
date Sat, 21 Apr 2012 21:19:39 +0100
parents 060f02cd4591
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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
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4 namespace MetroWpf
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5 {
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6 /// <summary>
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7 /// Extension methods for all comparable objects eg. string, DateTime, numeric values ...
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8 /// </summary>
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9 public static class ComparableExtensions
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10 {
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11
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12 /// <summary>
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13 /// Determines whether the specified value is between the the defined minimum and maximum range (including those values).
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14 /// </summary>
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15 /// <typeparam name="T"></typeparam>
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16 /// <param name="value">The value.</param>
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17 /// <param name="minValue">The minimum value.</param>
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18 /// <param name="maxValue">The maximum value.</param>
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19 /// <returns>
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20 /// <c>true</c> if the specified value is between min and max; otherwise, <c>false</c>.
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21 /// </returns>
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22 /// <example>
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23 /// var value = 5;
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24 /// if(value.IsBetween(1, 10)) {
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25 /// // ...
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26 /// }
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27 /// </example>
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28 public static bool IsBetween<T>(this T value, T minValue, T maxValue) where T : IComparable<T>
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29 {
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30 return IsBetween(value, minValue, maxValue, null);
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31 }
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32
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33 /// <summary>
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34 /// Determines whether the specified value is between the the defined minimum and maximum range (including those values).
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35 /// </summary>
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36 /// <typeparam name="T"></typeparam>
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37 /// <param name="value">The value.</param>
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38 /// <param name="minValue">The minimum value.</param>
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39 /// <param name="maxValue">The maximum value.</param>
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40 /// <param name="comparer">An optional comparer to be used instead of the types default comparer.</param>
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41 /// <returns>
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42 /// <c>true</c> if the specified value is between min and max; otherwise, <c>false</c>.
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43 /// </returns>
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44 /// <example>
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45 /// var value = 5;
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46 /// if(value.IsBetween(1, 10)) {
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47 /// // ...
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48 /// }
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49 /// </example>
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50 public static bool IsBetween<T>(this T value, T minValue, T maxValue, IComparer<T> comparer) where T : IComparable<T>
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51 {
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52 comparer = comparer ?? Comparer<T>.Default;
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53
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54 var minMaxCompare = comparer.Compare(minValue, maxValue);
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55 if (minMaxCompare < 0)
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56 {
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57 return ((comparer.Compare(value, minValue) >= 0) && (comparer.Compare(value, maxValue) <= 0));
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58 }
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59 else if (minMaxCompare == 0)
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60 {
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61 return (comparer.Compare(value, minValue) == 0);
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62 }
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63 else
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64 {
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65 return ((comparer.Compare(value, maxValue) >= 0) && (comparer.Compare(value, minValue) <= 0));
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66 }
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67 }
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68 }
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69 }