Fixing issue #36

Author: moonpyk

DevTrends.MvcDonutCaching/KeyGenerator.cs

@@ -10,9 +10,9 @@ namespace DevTrends.MvcDonutCaching
 {
     public class KeyGenerator : IKeyGenerator
     {
-        private const string RouteDataKeyAction     = "action";
-        private const string RouteDataKeyController = "controller";
-        private const string DataTokensKeyArea      = "area";
+        internal const string RouteDataKeyAction     = "action";
+        internal const string RouteDataKeyController = "controller";
+        internal const string DataTokensKeyArea      = "area";
 
         private readonly IKeyBuilder _keyBuilder;
 
@@ -26,6 +26,12 @@ public KeyGenerator(IKeyBuilder keyBuilder)
             _keyBuilder = keyBuilder;
         }
 
+        /// <summary>
+        /// Generates a key given the <see cref="context"/> and <see cref="cacheSettings"/>.
+        /// </summary>
+        /// <param name="context">The controller context.</param>
+        /// <param name="cacheSettings">The cache settings.</param>
+        /// <returns>A string that can be used as an output cache key</returns>
         [CanBeNull]
         public string GenerateKey(ControllerContext context, CacheSettings cacheSettings)
         {

DevTrends.MvcDonutCaching/OutputCacheManager.cs

@@ -159,6 +159,17 @@ public void RemoveItems([AspMvcController] string controllerName, [AspMvcAction]
             {
                 foreach (var routeValue in routeValues)
                 {
+                    // Ignoring the "area" part of the route values if it's an empty string
+                    // Ref : https://github.com/moonpyk/mvcdonutcaching/issues/36
+                    if (routeValue.Key == KeyGenerator.DataTokensKeyArea)
+                    {
+                        var areaString = routeValue.Value as string;
+                        if (string.IsNullOrWhiteSpace(areaString))
+                        {
+                            continue;
+                        }
+                    }
+
                     var keyFrag = _keyBuilder.BuildKeyFragment(routeValue);
 
                     if (string.IsNullOrEmpty(keyFrag))