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MES开发中, 客户往往会要求 工单开始时记录工艺数据, 工单结束时将这些工艺数据回传到更上一级的WES系统中. 因为MES系统和PLC 是多线程读取, 所以加锁, 事件触发是常用手段.

using MyWebApiTest.PLC;
using MyWebApiTest.Service;
using MyWebApiTest.Service.Entry;
using MyWebApiTest.Service.Entry.Imp;
using MyWebApiTest.Service.Factory;
using MyWebApiTest.Service.Factory.Impl;
using MyWebApiTest.Utils;
using Serilog;var builder = WebApplication.CreateBuilder(args);// Add services to the container.//日志
builder.Host.UseSerilog((context, logger) =>
{logger.ReadFrom.Configuration(context.Configuration);logger.Enrich.FromLogContext();
});// Add services to the container.
builder.Configuration.AddJsonFile("appsettings.json", false, true);
var cfg = builder.Configuration;
builder.Services.AddSingleton<IConfiguration>(cfg);//ORM
builder.Services.AddSingleton<ISqlSugarService ,SqlSugarServiceImpl>();
builder.Services.AddSingleton<SqlSugarHelper>();builder.Services.AddSingleton<IAbsFactoryService, AbsFactoryServiceImpl>();builder.Services.AddSingleton<IConnFactoryService, ConnFactoryServiceImpl2>();
builder.Services.AddSingleton<IConnFactoryService, ConnFactoryServiceImpl1>();//PLC数据
builder.Services.AddSingleton<MyS7Entry>();
builder.Services.AddSingleton<IS7ConnService, S7ConnServiceImpl>();//运行初始化任务  测试client
//builder.Services.AddSingleton<IHostedService, StartupInitializationService>();//client
builder.Services.AddHttpClient();//AutoMapper
builder.Services.AddAutoMapper(AppDomain.CurrentDomain.GetAssemblies());builder.Services.AddControllers();
builder.Services.AddCors(c => c.AddPolicy("any", p => p.AllowAnyHeader().AllowAnyMethod().AllowAnyOrigin()));
// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();//日志
builder.Host.UseSerilog((context, logger) =>
{logger.ReadFrom.Configuration(context.Configuration);logger.Enrich.FromLogContext();
});var app = builder.Build();// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{app.UseSwagger();app.UseSwaggerUI();
}
app.UseCors("any");app.UseAuthorization();app.MapControllers();app.Run();

using S7.Net;namespace MyWebApiTest.Service.Entry
{public interface IS7ConnService{void ConnPlc();bool MyIsConnected{get;}Plc MyS7Master { get; }}
}

using MyWebApiTest.PLC;
using MyWebApiTest.Service.Entry;
using S7.Net;namespace MyWebApiTest.Service.Entry.Imp
{public class S7ConnServiceImpl : IS7ConnService{public S7ConnServiceImpl(IConfiguration configuration,HttpClient httpClient,ILogger<S7ConnServiceImpl> logger,MyS7Entry myS7Entry){this.configuration = configuration;this.httpClient = httpClient;this.logger = logger;this.myS7Entry = myS7Entry;myIp = configuration.GetSection("PlcIp").Value;}private readonly IConfiguration configuration;private readonly HttpClient httpClient;private readonly ILogger<S7ConnServiceImpl> logger;private MyS7Entry myS7Entry;private string myIp;private Plc myS7Master = null;private MyS7EntityRecive? myS7test = new MyS7EntityRecive();private MyS7Entry myS7Data = new MyS7Entry();private bool myIsConnected = false;private CancellationTokenSource cts = new();private int errorTimes = 0;private static readonly object lockObj = new object(); // 创建一个对象作为锁public Plc MyS7Master{get => myS7Master;}public MyS7Entry MyS7Data{get => myS7Data;set => myS7Data = value;}public bool MyIsConnected{get => myIsConnected;set{if (myIsConnected == false && value == true){logger.LogInformation("PLC连接成功!");}myIsConnected = value;}}public void ConnPlc(){Task.Run(async () =>{while (!cts.IsCancellationRequested){if (myS7Master == null || !MyIsConnected){try{myS7Master = new Plc(CpuType.S71500, myIp, 0, 0);myS7Master.Open();MyIsConnected = myS7Master.IsConnected;}catch (Exception ex){myS7Master?.Close();myS7Master = null;MyIsConnected = false;logger.LogError(ex.Message);await Task.Delay(2000);}}else if (MyIsConnected){//注入Client//var url = "http://localhost:5190/api/private/v1/My/MyGet"; // 目标 Web API 的地址//var response = await httpClient.GetAsync(url);//if (response.IsSuccessStatusCode)//{//    var content = await response.Content.ReadAsStringAsync();//    logger.LogError(content);//}try{MyIsConnected = myS7Master.IsConnected;await Task.Delay(1000);myS7test = await myS7Master.ReadClassAsync<MyS7EntityRecive>(31, 416);lock (lockObj){myS7Entry.MyShort1 = myS7test.MyShort1;myS7Entry.MyShort2 = myS7test.MyShort2;}logger.LogInformation(myS7Entry.MyShort1.ToString() + "====");}catch (Exception ex){errorTimes++;await Task.Delay(1000);logger.LogError($"读取时发生错误:{ex.Message}");logger.LogError($"读取时发生错误次数:{errorTimes}");myS7Master.Close();MyIsConnected = false;myS7Master = null;}}}}, cts.Token);}}
}/*使用了 lock 来保护 myS7Entry.MyShort1 和 myS7Entry.MyShort2 的同时修改，
以确保在同一时间只有一个线程可以修改这两个属性。这是一种常见的使用锁的方式，
目的是避免竞态条件和数据不一致性。死锁通常发生在两个或多个线程之间存在循环依赖锁的情况下，
导致它们互相等待对方释放锁。在你的代码中，只有一个 lock，并且在修改属性时使用，
不会导致循环依赖锁，因此不会发生死锁。但要注意，死锁可能在其他情况下发生，比如在涉及多个锁的复杂情况下，
或者在锁嵌套的情况下。确保你的代码中不会出现多个锁之间的循环依赖，
以及在锁内部避免阻塞线程，以保证代码的正常执行。*/

using System.ComponentModel;namespace MyWebApiTest.PLC
{public class MyS7Entry : INotifyPropertyChanged{public event PropertyChangedEventHandler? PropertyChanged;private short myShort1;public short MyShort1{get => myShort1;set{if (myShort1 != value){if (myShort1 == 1 && value == 0){OnPropertyChanged(nameof(MyShort1));}myShort1 = value;}}}private short myShort2;public short MyShort2{get => myShort2;set{if (myShort2 != value){if (myShort2 == 1 && value == 0){OnPropertyChanged(nameof(MyShort2));}myShort2 = value;}}}private void OnPropertyChanged(string propertyName){PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));}}
}

namespace MyWebApiTest.PLC
{public class MyS7EntityRecive{public short MyShort1 { get; set; }public short MyShort2 { get; set; }}
}

using MyWebApiTest.entities;
using MyWebApiTest.PLC;
using MyWebApiTest.Service.Entry;
using System.Text.Json;namespace MyWebApiTest.Utils
{public class StartupInitializationService : IHostedService{private readonly MyS7Entry myS7Entry;private readonly IS7ConnService s7ConnService;private readonly ILogger<StartupInitializationService> logger;private readonly HttpClient httpClient;public StartupInitializationService(MyS7Entry myS7Entry, IS7ConnService s7ConnService, ILogger<StartupInitializationService> logger, HttpClient httpClient){this.myS7Entry = myS7Entry;this.s7ConnService = s7ConnService;this.logger = logger;this.httpClient = httpClient;}public Task StartAsync(CancellationToken cancellationToken){try{s7ConnService.ConnPlc();}catch (Exception ex){logger.LogError($"网络错误:{ex.Message}");return Task.CompletedTask;}logger.LogWarning("初始化函数成功");myS7Entry.PropertyChanged += async (s, e) =>{if (e.PropertyName == "MyShort1"){string? url = "http://127.0.0.1:8081/endpoint/mes/kx/reportA";Student stu = new(){Id = 1,Name = "MyBool1",Age = 999};var json = JsonSerializer.Serialize(stu);var content = new StringContent(json, System.Text.Encoding.UTF8, "application/json");var response = await httpClient.PostAsync(url, content);if (response.IsSuccessStatusCode){logger.LogInformation("Data sent successfullyS1.");}else{logger.LogInformation("Failed to send dataS1.");}}else if (e.PropertyName == "MyShort2"){string? url = "http://127.0.0.1:8081/endpoint/mes/kx/reportB";Student stu = new(){Id = 2,Name = "MyBool2",Age = 888};var json = JsonSerializer.Serialize(stu);var content = new StringContent(json, System.Text.Encoding.UTF8, "application/json");var response = await httpClient.PostAsync(url, content);if (response.IsSuccessStatusCode){logger.LogInformation("Data sent successfullyS1.");}else{logger.LogInformation("Failed to send dataS1.");}}};return Task.CompletedTask;}public Task StopAsync(CancellationToken cancellationToken){// 在应用程序停止时执行清理逻辑（如果有必要）return Task.CompletedTask;}}
}