基于AI大文本模型的智慧对话开发设计及C#源码实现，实现智能文本改写与智慧对话

文章目录

1.AI 大模型发展现状
2.基于AI服务的智慧对话开发
- 2.1 大模型API选择
- 2.2 基于C#的聊天界面开发
- 2.3 星火大模型API接入
- 2.4 优化开发界面与显示逻辑
3.源码工程Demo及相关软件下载
参考文献

1.AI 大模型发展现状

端午假期几天，关注到国内的AI大模型厂商近乎疯狂地打起了价格战，这边阿里云刚宣布降价97%，那边百度就宣布两款模型全面免费，好不热闹！据不完全统计，国内已有7家大模型企业“参战”，包括字节跳动、阿里云、百度、腾讯云等互联网大厂，智谱AI、深度求索等AI创企，以及垂直赛道头部玩家科大讯飞，纷纷争夺“最便宜”“最高性价比”大模型这块蛋糕。
在这里插入图片描述
▲国内大模型厂商参与价格战情况（智东西制表，统计于2024年5月27日）
总的来看，各大厂商对降价原因的解释无外乎以下几点：技术突破了，推理成本降低了；为开发者兜底，降低大模型的使用门槛；提升产品竞争力，积累客户。但大模型价格战对产业的影响具有两面性，既能够促使产业格局变化和商业模式创新，也为开发者带来机遇，有利于爆款应用的开发和大模型私有化部署。

2.基于AI服务的智慧对话开发

由于工作关系，涉及到相关文字材料的编制，对于某些材料，选用baidu的文心一言或者Aliyun的通义千问对于简单的工作来说可以提升部分效率，但是基于网页端还是存在一些限制，于是计划假期间利用C#语言+VS2015的win界面开发优势，配合大模型API实现快速的文本改写、文字降重以及智慧对话的功能

2.1 大模型API选择

选择讯飞星火大模型，其SparkLite免费为开发者开放，且不限tokens和有效期，提供各类开发的Demo源码，对于新手开发的话也比较友好。
在这里插入图片描述

2.2 基于C#的聊天界面开发

聊天界面开发计划基于Panel、RichTextBox、Button、PictureBox组成。其中Button主要负责模拟发送。
在这里插入图片描述

值得说明的是：Panel部分的聊天窗口由设计如下控件组成，且要支持右键菜单的复制和全选的功能，方便获取消息内容。

功能	控件
头像	PictureBox
昵称	Label
发送时间	Label
信息详情	RichTextBox
右键菜单	ContextMenuStrip

实现的效果如下：
在这里插入图片描述

主窗体源码如下：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        //新建聊天控件全局变量
        ChatBubble tsps_chat;

        private void button1_Click(object sender, EventArgs e)
        {

            Image touxiang = (WindowsFormsApplication1.Properties.Resources._001);
            Image touxiang2 = (WindowsFormsApplication1.Properties.Resources._002);
            //发送
            tsps_chat.AddMsg(touxiang2,
                richTextBox1.Text, ChatBubble.MsgPlace.Right, "测试");
            //模拟接收
            tsps_chat.AddMsg(touxiang,
                "你好，我有一个帽衫...",ChatBubble.MsgPlace.Left,"TSPS");

           

        }

        private void Form1_Load(object sender, EventArgs e)
        {
            panel1.VerticalScroll.Visible = true;
            panel1.AutoScroll = true;
            Font ft = new Font("黑体", 12, Font.Style & ~FontStyle.Italic);
            //创建新的聊天窗口（传入panel和font）
            tsps_chat = new ChatBubble(panel1, ft);
        }

    }


}

Panel相关代码如下：

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{

    /// <summary>
    /// 聊天窗口展示类
    /// </summary>
    class Class1
    {
    }
    class ChatBubble
    {
        /// <summary>
        /// 生成菜单项
        /// </summary>
        /// <param name="txt"></param>
        /// <param name="img"></param>
        /// <returns></returns>
        private ToolStripMenuItem GetMenuItem(string txt, Image img)
        {
            ToolStripMenuItem menuItem = new ToolStripMenuItem();
            menuItem.Text = txt;
            menuItem.Image = img;
            return menuItem;
        }
        /// <summary>
        /// 菜单项事件响应
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void toolStripMenuItem_Click(object sender, ToolStripItemClickedEventArgs e)
        {
            //ToolStripMenuItem menuSend = sender as ToolStripMenuItem;
            //string selectText = ((RichTextBox)menuSend.).SelectedText;
            //MessageBox.Show(menu.Text);
            //获取对应控件的值
            ContextMenuStrip menu_now = (ContextMenuStrip)sender;
            RichTextBox tb = ((RichTextBox)(menu_now).SourceControl);
            if (((ContextMenuStrip)sender).Items[0] == e.ClickedItem)//全选
            {
                tb.Focus();//设置先焦点定位到当前活动的RichTextBox,
                tb.SelectAll();
            }
            else if (((ContextMenuStrip)sender).Items[1] == e.ClickedItem)//复制
            {
               
                Clipboard.SetDataObject(tb.SelectedText);
            }

        }
        
        public ChatBubble(Panel panel, Font font)
        {
            if (panel.Controls.Count != 0) throw new Exception("指定Panel控件不为空!");
            ChatPlace = panel;
            BubbleFont = font;
            Context_caidan = new ContextMenuStrip();
            MsgMaxLength = panel.Width - (6 * 4 + 35*2 );    // 其中, 四个6为 图片与(容器以及消息文本框)的距离 ,两个35为两侧图片的大小.
            //右键菜单编辑
            Context_caidan.Items.Add("全选");//添加到右键菜单
            Context_caidan.Items.Add("复制");//添加到右键菜单
            //绑定消息
            Context_caidan.ItemClicked += new ToolStripItemClickedEventHandler(toolStripMenuItem_Click);//添加事件
            //Control.ContextMenuStrip = Context_caidan;
        }

        readonly Panel ChatPlace;
        readonly Font BubbleFont;
        readonly ContextMenuStrip Context_caidan;//右键复制菜单

        int NowY = 7;

        readonly int MsgMaxLength;

        public enum MsgPlace
        {
            Left,
            Right
        }              // 气泡创建的位置

        /// <summary>
        /// 根据文本内容设置textbox高度等属性
        /// </summary>
        /// <param name="txt1"></param>
        private void SettxtHeight(RichTextBox textBox1,string showString)
        {
            //属性
            textBox1.Text = showString;
            textBox1.Multiline = true;
            textBox1.WordWrap = true;
            textBox1.Font = BubbleFont;
            textBox1.Width = MsgMaxLength;
            textBox1.BorderStyle = BorderStyle.None;
            textBox1.ContextMenuStrip = Context_caidan;//为文本框添加右键菜单
            textBox1.ReadOnly = true;
            //尺寸参数
            int txtHeight = 22;//设置单行的行高
            int MaxLineCount = 20;//设置最大行数
            Size size = TextRenderer.MeasureText(textBox1.Text, textBox1.Font);
            int itxtLine = size.Width / textBox1.Width + textBox1.Lines.Count() + 1;
            if (itxtLine > MaxLineCount) { itxtLine = MaxLineCount; }
            itxtLine -= 1;
            textBox1.Height = txtHeight * itxtLine;
            
            
        }

        public void AddMsg(Image Photo, string Text, MsgPlace Place, string Name)
        {
            if (ChatPlace.Controls.Count > 4*51) //仅保留近51条消息
            {
                ChatPlace.Controls.Clear();
                NowY = 7;
            }
            if (ChatPlace.Controls.Count != 0)
            {
                NowY = ChatPlace.Controls[ChatPlace.Controls.Count - 2].Location.Y
                    + ChatPlace.Controls[ChatPlace.Controls.Count - 1].Height + 35;//间隔控制
            }
            
            PictureBox photo = new PictureBox();                // 头像
            Label nickname = new Label();                       // 昵称
            Label sendtime = new Label();
            // Label msg = new Label();
            RichTextBox msg = new RichTextBox();
            
            

            photo.Size = new Size(35, 35);
            photo.SizeMode = PictureBoxSizeMode.StretchImage;
            photo.Image = Photo;

            nickname.AutoSize = true;
            nickname.MaximumSize = new Size(0, 0);
            nickname.Font = BubbleFont;
            nickname.Text = Name;

            //获取当前时间
            string timenow = System.DateTime.Now.ToString("T");
            sendtime.AutoSize = true;
            sendtime.MaximumSize = new Size(0, 0);
            sendtime.Font = BubbleFont;
            sendtime.Text = timenow;

            //msg.AutoSize = true;
            //msg.Font = BubbleFont;
            //msg.MaximumSize = new Size(MsgMaxLength, 0);
            // msg.Text = Text;
            //msg.BorderStyle = BorderStyle.None;
            SettxtHeight(msg,Text);//自动调整文本框大小
           

            ChatPlace.Controls.Add(nickname);
            ChatPlace.Controls.Add(sendtime);
            ChatPlace.Controls.Add(photo);
            ChatPlace.Controls.Add(msg);

            if (Place == MsgPlace.Left)
            {
                msg.BackColor = Color.LightGreen;
                photo.Location = new Point(7, NowY);
                sendtime.Location = new Point(ChatPlace.Width/2-45, NowY);
                nickname.Location = new Point(photo.Location.X + photo.Width + 6, NowY);
                msg.Location = new Point(nickname.Location.X, NowY + nickname.Size.Height);
            }
            else
            {
                msg.BackColor = Color.LightSkyBlue;
                photo.Location = new Point(ChatPlace.Width - 7 - 35 - 10, NowY);
                sendtime.Location = new Point(ChatPlace.Width/2 -45 , NowY);
                nickname.Location = new Point(photo.Location.X - 7 - nickname.Width - 17, NowY);
                msg.Location = new Point(photo.Location.X - msg.Width - 10, NowY + nickname.Size.Height);
                // 这里的减去10是除去滚动条的宽度
            }
            //panel滚动条到最下方
            Point newPoint = new Point(0, ChatPlace.Height - ChatPlace.AutoScrollPosition.Y);
            ChatPlace.AutoScrollPosition = newPoint;
        }
    }        // 简易聊天气泡

}

2.3 星火大模型API接入

使用如下C#代码接入讯飞星火大模型API

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;
using System.Collections;
using Newtonsoft.Json;
using System.Net.WebSockets;
using System.Threading;
using Newtonsoft.Json.Linq;
using System.Text.Json;

/**
 * 星火认知大模型 WebAPI 接口调用示例 接口文档（必看）：https://www.xfyun.cn/doc/spark/Web.html
 * 错误码链接：https://www.xfyun.cn/doc/spark/%E6%8E%A5%E5%8F%A3%E8%AF%B4%E6%98%8E.html （code返回错误码时必看）
 * @author iflytek
 */
namespace Webiat
{
    class Program
    {
        static ClientWebSocket webSocket0;
        static CancellationToken cancellation;
        // 应用APPID（必须为webapi类型应用，并开通星火认知大模型授权）
        const string x_appid = "XXXXXXXX";
        // 接口key（webapi类型应用开通星火认知大模型后，控制台--我的应用---星火认知大模型---相应服务的apikey）
        const string api_secret = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";
        // 接口密钥（webapi类型应用开通星火认知大模型后，控制台--我的应用---星火认知大模型---相应服务的apisecret）
        const string api_key = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";

        static string hostUrl = "https://spark-api.xf-yun.com/v1.1/chat";
        async public static void Tasker()
        {
            
            string authUrl = GetAuthUrl();
            string url = authUrl.Replace("http://", "ws://").Replace("https://", "wss://");
            using (webSocket0 = new ClientWebSocket())
            {
                try
                {
                    await webSocket0.ConnectAsync(new Uri(url), cancellation);

                    JsonRequest request = new JsonRequest();
                    request.header = new Header()
                                    {
                                        app_id = x_appid,
                                        uid = "12345"
                                    };
                    request.parameter = new Parameter()
                                        {
                                            chat = new Chat()
                                            {
                                                domain = "general",//模型领域，默认为星火通用大模型
                                                temperature = 0.5,//温度采样阈值，用于控制生成内容的随机性和多样性，值越大多样性越高；范围（0，1）
                                                max_tokens = 1024,//生成内容的最大长度，范围（0，4096）
                                            }
                                        };
                    request.payload = new Payload()
                                        {
                                            message = new Message()
                                            {
                                                text = new List<Content>
                                                {
                                                    new Content() { role = "user", content = "你是谁" },
                                                    // new Content() { role = "assistant", content = "....." }, // AI的历史回答结果，这里省略了具体内容，可以根据需要添加更多历史对话信息和最新问题的内容。
                                                }
                                            }
                                        };

                    string jsonString = JsonConvert.SerializeObject(request);
                    //连接成功，开始发送数据
                    

                    var frameData2 = System.Text.Encoding.UTF8.GetBytes(jsonString.ToString());

                    
                    webSocket0.SendAsync(new ArraySegment<byte>(frameData2), WebSocketMessageType.Text, true, cancellation);
                   
                    // 接收流式返回结果进行解析
                    byte[] receiveBuffer = new byte[1024];
                    WebSocketReceiveResult result = await webSocket0.ReceiveAsync(new ArraySegment<byte>(receiveBuffer), cancellation);
                    String resp = "";
                    while (!result.CloseStatus.HasValue)
                    {
                        if (result.MessageType == WebSocketMessageType.Text)
                        {
                            string receivedMessage = Encoding.UTF8.GetString(receiveBuffer, 0, result.Count);
                            //将结果构造为json
                            
                            JObject jsonObj = JObject.Parse(receivedMessage);
                            int code = (int)jsonObj["header"]["code"];
                            
                            
                            if(0==code){
                                int status = (int)jsonObj["payload"]["choices"]["status"];
                                

                                JArray textArray = (JArray)jsonObj["payload"]["choices"]["text"];
                                string content = (string)textArray[0]["content"];
                                resp += content;

                                if(status != 2){
                                    Console.WriteLine($"已接收到数据： {receivedMessage}");
                                }
                                else{
                                    Console.WriteLine($"最后一帧： {receivedMessage}");
                                    int totalTokens = (int)jsonObj["payload"]["usage"]["text"]["total_tokens"];
                                    Console.WriteLine($"整体返回结果： {resp}");
                                    Console.WriteLine($"本次消耗token数： {totalTokens}");
                                    break;
                                }

                            }else{
                                Console.WriteLine($"请求报错： {receivedMessage}");
                            }
                                

                        }
                        else if (result.MessageType == WebSocketMessageType.Close)
                        {
                            Console.WriteLine("已关闭WebSocket连接");
                            break;
                        }

                        result = await webSocket0.ReceiveAsync(new ArraySegment<byte>(receiveBuffer), cancellation);
                    }
                }
                catch (Exception e)
                {
                    Console.WriteLine(e.Message);
                }
            }
        }
        // 返回code为错误码时，请查询https://www.xfyun.cn/document/error-code解决方案
        static string GetAuthUrl()
        {
            string date = DateTime.UtcNow.ToString("r");

            Uri uri = new Uri(hostUrl);
            StringBuilder builder = new StringBuilder("host: ").Append(uri.Host).Append("\n").//
                                    Append("date: ").Append(date).Append("\n").//
                                    Append("GET ").Append(uri.LocalPath).Append(" HTTP/1.1");

            string sha = HMACsha256(api_secret, builder.ToString());
            string authorization = string.Format("api_key=\"{0}\", algorithm=\"{1}\", headers=\"{2}\", signature=\"{3}\"", api_key, "hmac-sha256", "host date request-line", sha);
            //System.Web.HttpUtility.UrlEncode

            string NewUrl = "https://" + uri.Host + uri.LocalPath;

            string path1 = "authorization" + "=" + Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes(authorization));
            date = date.Replace(" ", "%20").Replace(":", "%3A").Replace(",", "%2C");
            string path2 = "date" + "=" + date;
            string path3 = "host" + "=" + uri.Host;

            NewUrl = NewUrl + "?" + path1 + "&" + path2 + "&" + path3;
            return NewUrl;
        }




        public static string HMACsha256(string apiSecretIsKey, string buider)
        {
            byte[] bytes = System.Text.Encoding.UTF8.GetBytes(apiSecretIsKey);
            System.Security.Cryptography.HMACSHA256 hMACSHA256 = new System.Security.Cryptography.HMACSHA256(bytes);
            byte[] date = System.Text.Encoding.UTF8.GetBytes(buider);
            date = hMACSHA256.ComputeHash(date);
            hMACSHA256.Clear();

            return Convert.ToBase64String(date);

        }
        
        
        static void Main(string[] args)
        {
            Tasker();
            Console.ReadLine();
        }

    }
}



//构造请求体
public class JsonRequest
{
    public Header header { get; set; }
    public Parameter parameter { get; set; }
    public Payload payload { get; set; }
}

public class Header
{
    public string app_id { get; set; }
    public string uid { get; set; }
}

public class Parameter
{
    public Chat chat { get; set; }
}

public class Chat
{
    public string domain { get; set; }
    public double temperature { get; set; }
    public int max_tokens { get; set; }
}

public class Payload
{
    public Message message { get; set; }
}

public class Message
{
    public List<Content> text { get; set; }
}

public class Content
{
    public string role { get; set; }
    public string content { get; set; }
}