示例：AspNetCore 2.2 MVC 注入日志

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一、目的：了解Asp.net Core MVC中添加日志模块的过程

 

二、过程：

 

1、添加Logging.json到应用程序集中

{"Logging": {"LogLevel": {"Default": "Debug","System": "Information","Microsoft": "Information"},"Console":{"IncludeScopes": "true","TimestampFormat": "[HH:mm:ss] ","LogToStandardErrorThreshold": "Warning"}}

2、在Startup中代码如下

  public class Startup{ILogger _logger;public Startup(IConfiguration configuration, ILogger<Startup> logger){Configuration = configuration;_logger = logger;}public IConfiguration Configuration { get; }// This method gets called by the runtime. Use this method to add services to the container.public void ConfigureServices(IServiceCollection services){_logger.LogInformation("Step ConfigureServices");//  Do：获取数据库连接字符串string cs = this.Configuration.GetConnectionString("MySqlConnection");//  Do：注册数据上下文services.AddDbContextWithConnectString<DataContext>(cs); //  Do：依赖注入services.AddScoped<IUserAccountRespositroy, UserAccountRespositroy>();//  Message：注册内服务领域模型//services.AddScoped<TestService>();//services.AddTransient(l => new HomeControler(new TestServer("fdfdd"))); services.Configure<CookiePolicyOptions>(options =>{// This lambda determines whether user consent for non-essential cookies is needed for a given request.options.CheckConsentNeeded = context => true;options.MinimumSameSitePolicy = SameSiteMode.None;});services.Configure<CookiePolicyOptions>(options =>{// This lambda determines whether user consent for non-essential cookies is needed for a given request.options.CheckConsentNeeded = context => true;options.MinimumSameSitePolicy = SameSiteMode.None;});services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2);//  Message：注册过滤器//services.AddMvc(l=>l.Filters.Add(new SamepleGlobalActionFilter())) ;//  Do：注册日志var loggingConfiguration = new ConfigurationBuilder().SetBasePath(Directory.GetCurrentDirectory()).AddJsonFile("logging.json", optional: false, reloadOnChange: true).Build();services.AddLogging(builder =>{builder.AddConfiguration(loggingConfiguration.GetSection("Logging")).AddFilter("Microsoft", LogLevel.Warning).AddFilter("HeBianGu.Product.WebApp.Demo", LogLevel.Debug).AddConsole();}); }// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.public void Configure(IApplicationBuilder app, IHostingEnvironment env){//  Do：注册日志if (env.IsDevelopment()){app.UseDeveloperExceptionPage();}else{app.UseExceptionHandler("/Home/Error");// The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.app.UseHsts();}app.UseHttpsRedirection();app.UseStaticFiles();//app.UseCookiePolicy();app.UseMvc(routes =>{routes.MapRoute(name: "default",template: "{controller=Home}/{action=Login}/{id?}"); });//app.UseMvc(routes =>//{//    routes.MapRoute(//        name: "default",//        template: "{controller=User}/{action=Index}/{id?}");//});}}

其中，

//  Do：注册日志
            var loggingConfiguration = new ConfigurationBuilder()
                .SetBasePath(Directory.GetCurrentDirectory())
                .AddJsonFile("logging.json", optional: false, reloadOnChange: true)
                .Build();

            services.AddLogging(builder =>
            {
                builder
                    .AddConfiguration(loggingConfiguration.GetSection("Logging"))
                    .AddFilter("Microsoft", LogLevel.Warning)
                    .AddFilter("HeBianGu.Product.WebApp.Demo", LogLevel.Debug)
                    .AddConsole();
            }); 

部分为注册日志的代码

 

3、在Controler中应用注入日志

  public class HomeController : Controller{IUserAccountRespositroy _respository;ILogger _logger;public HomeController(IUserAccountRespositroy respository, ILogger<HomeController> logger){_respository = respository;_logger = logger;}public IActionResult Index(){return View();}public IActionResult Privacy(){return View();}public IActionResult Login(){return View();}[HttpPost]public IActionResult Login(LoginViewModel model){_logger.LogInformation("点击登录");if (ModelState.IsValid){//检查用户信息var user = _respository.CheckUserLogin(model.UserName, model.Password);if (user != null){//记录Session//HttpContext.Session.SetString("CurrentUserId", user.Id.ToString());//HttpContext.Session.Set("CurrentUser", ByteConvertHelper.Object2Bytes(user));//跳转到系统首页return RedirectToAction("Monitor", "Monitor");}ViewBag.ErrorInfo = "用户名或密码错误。";return View();}foreach (var item in ModelState.Values){if (item.Errors.Count > 0){ViewBag.ErrorInfo = item.Errors[0].ErrorMessage;break;}}return View();}[ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]public IActionResult Error(){return View(new ErrorViewModel { RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier });}//  Message：每个控制器的基类Controler 都包含两个过滤器，这个在过滤器之后调用，下面在过滤器之前调用public override void OnActionExecuted(ActionExecutedContext context){Debug.WriteLine("OnActionExecuted");base.OnActionExecuted(context);}public override void OnActionExecuting(ActionExecutingContext context){Debug.WriteLine("OnActionExecuting");base.OnActionExecuting(context);}}

其中，

ILogger _logger;

        public HomeController(IUserAccountRespositroy respository, ILogger<HomeController> logger)
        {
            _respository = respository;

            _logger = logger;
        }

部分为获取日志方法；

_logger.LogInformation("点击登录");

为写日志方法；

 

 

 

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