在上一篇的Function中，我们用混合方式来分别调用语义Function和本地Function，但调用顺序是开发者组织的。
其实SK是可以自组织的，下面定义了一个本地Function——GetChineseDay，用ImportPluginFromFunctions的方式添加到SK的插件库里。当在Call1中询问“现在离吃月饼还有多少天？”时，GetChineseDay就会被自动调用，但如果换一个问题：“1=1=？”，这个问题与日期没有关关系，则本地函数不会触发。注意这个配置var settings = new OpenAIPromptExecutionSettings() { ToolCallBehavior = ToolCallBehavior.AutoInvokeKernelFunctions };。
using Microsoft.Extensions.DependencyInjection;using Microsoft.Extensions.Logging;using Microsoft.SemanticKernel;using Microsoft.SemanticKernel.ChatCompletion;using Microsoft.SemanticKernel.Connectors.OpenAI;using System;using System.Globalization;using System.Text;var chatModelId = "gpt-4o";var key = File.ReadAllText(@"C:\GPT\key.txt");var builder = Kernel.CreateBuilder();builder.AddOpenAIChatCompletion(chatModelId, key);Kernel kernel = builder.Build();kernel.ImportPluginFromFunctions("HelperFunctions",[kernel.CreateFunctionFromMethod(GetChineseDay, , )]);await Call1();async Task Call1(){Console.WriteLine("-----------------Call1 开始---------------------");var settings = new OpenAIPromptExecutionSettings() { ToolCallBehavior = ToolCallBehavior.AutoInvokeKernelFunctions };await foreach (var content in kernel.InvokePromptStreamingAsync("现在离吃月饼还有多少天？", new(settings))){Console.Write(content);}Console.WriteLine();Console.WriteLine("-----------------Call1 结束---------------------");}string GetChineseDay(){var chineseCalendar = new ChineseLunisolarCalendar();var today = DateTime.Now;int lunarYear = chineseCalendar.GetYear(today);int lunarMonth = chineseCalendar.GetMonth(today);int lunarDay = chineseCalendar.GetDayOfMonth(today);bool isLeapMonth = chineseCalendar.IsLeapMonth(lunarYear, lunarMonth);Console.WriteLine("-------GetChineseDay--------");return $"农历日期: {lunarYear}年 {(isLeapMonth ? "闰" : "")}{lunarMonth}月 {lunarDay}日";}Console.WriteLine();
await Call2();async Task Call2(){Console.WriteLine("-----------------Call2 开始---------------------");var settings = new OpenAIPromptExecutionSettings() { ToolCallBehavior = ToolCallBehavior.AutoInvokeKernelFunctions };var chat = kernel.GetRequiredService<IChatCompletionService>();var chatHistory = new ChatHistory("中国农历的表示方式是：九月初三，十二月二十三，请用这种表示方式表示农历日期。");chatHistory.AddUserMessage("现在离吃月饼还有多少天？");var contentBuilder = new StringBuilder();await foreach (var streamingContent in chat.GetStreamingChatMessageContentsAsync(chatHistory, settings, kernel)){if (streamingContent.Content is not null){Console.Write(streamingContent.Content);contentBuilder.Append(streamingContent.Content);}}chatHistory.AddAssistantMessage(contentBuilder.ToString());Console.WriteLine();Console.WriteLine("-----------------Call2 结束---------------------");}
下面是通过FunctionCallContentBuilder，来查看被调用的本地Function有哪些：
await Call3();async Task Call3(){Console.WriteLine("-----------------Call4 开始---------------------");IChatCompletionService chat = kernel.GetRequiredService<IChatCompletionService>();OpenAIPromptExecutionSettings settings = new() { ToolCallBehavior = ToolCallBehavior.EnableKernelFunctions };ChatHistory chatHistory = new();chatHistory.AddUserMessage("中秋节吃月饼，现在离吃月饼还有多少天？");while (true){AuthorRole? authorRole = null;var fccBuilder = new FunctionCallContentBuilder();await foreach (var streamingContent in chat.GetStreamingChatMessageContentsAsync(chatHistory, settings, kernel)){if (streamingContent.Content is not null){Console.Write(streamingContent.Content);}authorRole ??= streamingContent.Role;fccBuilder.Append(streamingContent);}Console.WriteLine();var functionCalls = fccBuilder.Build();if (!functionCalls.Any()){break;}var fcContent = new ChatMessageContent(role: authorRole ?? default, content: null);chatHistory.Add(fcContent);foreach (var functionCall in functionCalls){fcContent.Items.Add(functionCall);var functionResult = await functionCall.InvokeAsync(kernel);Console.WriteLine($"FunctionName：{functionResult.FunctionName}，Return：{functionResult.InnerContent}");chatHistory.Add(functionResult.ToChatMessage());}Console.WriteLine();}Console.WriteLine();Console.WriteLine("-----------------Call4 结束---------------------");}
