Add EnumExtensions (#8)

Author: ChrisSimmons

NetChris.Core/EnumExtensions.cs

@@ -0,0 +1,47 @@
+using System;
+using System.ComponentModel.DataAnnotations;
+using System.Linq;
+using System.Reflection;
+
+namespace NetChris.Core;
+
+// https://stackoverflow.com/a/25109103/208990
+/// <summary>
+/// 
+/// </summary>
+public static class EnumExtensions
+{
+    /// <summary>
+    ///     A generic extension method that aids in reflecting 
+    ///     and retrieving any attribute that is applied to an `Enum`.
+    /// </summary>
+    /// <seealso href="https://stackoverflow.com/a/25109103/208990" />
+    public static TAttribute? GetAttribute<TAttribute>(this Enum enumValue)
+        where TAttribute : Attribute
+    {
+        return enumValue.GetType()
+            .GetMember(enumValue.ToString())
+            .First()
+            .GetCustomAttribute<TAttribute>();
+    }
+    
+    /// <summary>
+    /// Get the <see cref="DisplayAttribute.Name"/> value from an enum value.
+    /// </summary>
+    public static string GetDisplayName(this Enum enumValue)
+    {
+        string result;
+        var attribute = enumValue.GetAttribute<DisplayAttribute>();
+
+        if (attribute?.Name == null)
+        {
+            result = enumValue.ToString();
+        }
+        else
+        {
+            result = attribute.Name;
+        }
+
+        return result;
+    }
+}

NetChris.Core/NetChris.Core.csproj

@@ -23,6 +23,10 @@
     <SupportedPlatform Include="browser"/>
   </ItemGroup>
 
+  <ItemGroup>
+    <PackageReference Include="System.ComponentModel.Annotations" Version="5.0.0" />
+  </ItemGroup>
+
   <ItemGroup>
     <None Include="Package-README.md">
       <PackagePath>/</PackagePath>