C#によるAlexaスキル実装の基礎：特集：はじめてのAlexaスキル開発（2/3 ページ）

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

using Amazon.Lambda.Core;

[assembly: LambdaSerializer(typeof(Amazon.Lambda.Serialization.Json.JsonSerializer))]

namespace InsiderNetAlexaSkillFunc
{
  public class Function
  {
    public string FunctionHandler(string input, ILambdaContext context)
    {
      return input?.ToUpper();
    }
  }
}

<ReturnType> <HandlerName>(<InputType> input, ILambdaContext context)

using System;
using Alexa.NET.Request;
using Alexa.NET.Response;
using Alexa.NET.Request.Type;
using Amazon.Lambda.Core;

[assembly: LambdaSerializer(typeof(Amazon.Lambda.Serialization.Json.JsonSerializer))]
namespace AWSLambda4
{
  public class Function
  {
    string[] messages =
    {
      "Hello Alexa From CSharp",
      "Hello Alexa From Insider.NET with CSharp",
      "C#で実装したLambdaコードからこんにちは！"
    };

    public SkillResponse FunctionHandler(SkillRequest input,
      ILambdaContext context)
    {
      string msg;
      switch (input.Request)
      {
        case LaunchRequest lr:
          msg = "こんにちは";
          break;
        case IntentRequest ir:
          msg = MakeResponse(ir);
          break;
        default:
          msg = "何か？";
          break;
      }

      var response = new SkillResponse
      {
        Version = "1.0",
        Response = new ResponseBody()
      };
      response.Response.OutputSpeech =
        new PlainTextOutputSpeech() { Text = msg };
      return response;
    }

    private string MakeResponse(IntentRequest ir)
    {
      string msg;
      switch (ir.Intent.Name)
      {
        case "HelloFromCSharpIntent":
          msg = messages[(new Random()).Next(3)];
          break;
        default:
          msg = "何か？";
          break;
      }
      return msg;
    }
  }
}

public class SkillRequest
{
  [JsonProperty("version")]
  public string Version { get; set; }

  [JsonProperty("session")]
  public Session Session { get; set; }

  [JsonProperty("context")]
  public Context Context { get; set; }

  [JsonProperty("request")]
  [JsonConverter(typeof(RequestConverter))]
  public Type.Request Request { get; set; }

  public System.Type GetRequestType()
  {
    return Request?.GetType();
  }
}

switch (input.Request)
{
  case LaunchRequest lr:
    msg = "こんにちは";
    break;
  case IntentRequest ir: 
    // インテントなら、MakeResponseメソッドでインテントごとに処理を切り分け
    msg = MakeResponse(ir);
    break;
  default:
    msg = "何か？";
    break;
}

private string MakeResponse(IntentRequest ir)
{
  string msg;
  switch (ir.Intent.Name)  // インテントの名前で処理を切り分ける
  {
    case "HelloFromCSharpIntent":
      msg = messages[(new Random()).Next(3)];
      break;
    default:
      msg = "何か？";
      break;
  }
  return msg;
}

var response = new SkillResponse
{
  Version = "1.0",
  Response = new ResponseBody()
};
response.Response.OutputSpeech =
  new PlainTextOutputSpeech() { Text = msg };
return response;