#588 Update to how SourceListKey gets set in EssentialsRoomBase

essentials-framework/Essentials Core/PepperDashEssentialsBase/Room/EssentialsRoomBase.cs

@@ -53,18 +53,22 @@ namespace PepperDash.Essentials.Core
         /// </summary>
 		/// 
 		protected string _SourceListKey;
-        public virtual string SourceListKey {
+        public string SourceListKey {
 			get
 			{
 				return _SourceListKey;
 			}
-			set
+			private set
 			{
-				_SourceListKey = value; 
+                if (value != _SourceListKey)
-
+                {
+                    _SourceListKey = value;
+                }
 			}
 		}
 
+        protected const string _defaultSourceListKey = "default";
+
         /// <summary>
         /// Timer used for informing the UIs of a shutdown
         /// </summary>        
@@ -160,6 +164,22 @@ namespace PepperDash.Essentials.Core
             return base.CustomActivate();
         }
 
+        /// <summary>
+        /// Sets the SourceListKey property to the passed in value or the default if no value passed in
+        /// </summary>
+        /// <param name="sourceListKey"></param>
+        protected void SetSourceListKey(string sourceListKey)
+        {
+            if (!string.IsNullOrEmpty(sourceListKey))
+            {
+                SourceListKey = sourceListKey;
+            }
+            else
+            {
+                sourceListKey = _defaultSourceListKey;
+            }
+        }
+
         /// <summary>
         /// If mobile control is enabled, sets the appropriate properties
         /// </summary>