# Adding action model to showcase advanced usage options

CSharp/Blog-LUISActionBinding/LuisActions.Samples.Shared/Advanced/AlternativesAction.cs

@@ -0,0 +1,56 @@
+namespace LuisActions.Samples
+{
+    using System;
+    using System.ComponentModel.DataAnnotations;
+    using System.Threading.Tasks;
+    using Microsoft.Cognitive.LUIS.ActionBinding;
+    using Newtonsoft.Json;
+
+    // This sample were added to showcase support to Custom List Entities - default JSON model does not have it
+
+    // Refer to 'List Entities' @ https://docs.microsoft.com/en-us/azure/cognitive-services/luis/add-entities
+
+    // You can create your own model with an 'AlternativeChoose' intent with utterances 
+    // having a 'List Entity' called 'Alternatives' with the canonical forms defined by the
+    // 'Alternative' enum - or just can simply create your custom list entity,
+    // intent and update the intent binding here and custom name/type at fields
+
+    public enum Alternative
+    {
+        // default (ie. empty choice)
+        None            =   0,
+
+        DomainOption1   =   11,
+        DomainOption2   =   12,
+        DomainOption3   =   13,
+
+        ExternalOption1 =   101,
+        ExternalOption2 =   102
+    }
+
+    public class RequiredEnumAttribute : ValidationAttribute
+    {
+        public override bool IsValid(object value)
+        {
+            return (int)value > 0;
+        }
+    }
+
+    [Serializable]
+    [LuisActionBinding("AlternativeChoose", FriendlyName = "Alternatives Choosing Model Sample")]
+    public class AlternativesAction : BaseLuisAction
+    {
+        [RequiredEnum(ErrorMessage = "Please provide an alternative")]
+        [LuisActionBindingParam(CustomType = "Alternatives", Order = 1)]
+        public Alternative FirstAlternative { get; set; }
+
+        [Required(ErrorMessage = "Please provide one or more alternatives")]
+        [LuisActionBindingParam(CustomType = "Alternatives", Order = 2)]
+        public Alternative[] SecondaryAlternatives { get; set; }
+
+        public override Task<object> FulfillAsync()
+        {
+            return Task.FromResult((object)JsonConvert.SerializeObject(this));
+        }
+    }
+}

CSharp/Blog-LUISActionBinding/LuisActions.Samples.Shared/LuisActions.Samples.Shared.csproj

@@ -58,6 +58,7 @@
     <Compile Include="GetDataFromPlaceBaseAction.cs" />
     <Compile Include="GetTimeInPlaceAction.cs" />
     <Compile Include="GetWeatherInPlaceAction.cs" />
+    <Compile Include="Advanced\AlternativesAction.cs" />
     <Compile Include="LocationAttibute.cs" />
     <Compile Include="Models\AirportInfo.cs" />
     <Compile Include="Models\WeatherInfo.cs" />