asp.net-core - 解决错误 - 无法解析类型 'Serilog.ILogger' 的服务

Question

我正在尝试在 ASP.NET core 应用程序(.NET 框架)中实现 SeriLog

以下是我迄今为止执行的步骤-

1) 在 Project.json 中添加了以下引用

"Serilog": "2.2.0",
"Serilog.Extensions.Logging": "1.2.0",
"Serilog.Sinks.RollingFile": "2.0.0",
"Serilog.Sinks.File": "3.0.0"

2) 在 Startup 类的构造函数中添加了以下几行 -

Log.Logger = new LoggerConfiguration()
           .MinimumLevel.Debug()
           .WriteTo.RollingFile(Path.Combine(env.ContentRootPath, "log-{Date}.txt"))
           .CreateLogger();

3) 在 Startup 类的配置方法中添加了以下行 -

loggerFactory.AddSerilog();

4)像这样将记录器注入(inject) HomeController -

ILogger logger;

    public HomeController(ILogger logger)
    {
        this.logger = logger;
    }

5)在“关于”操作中，尝试记录这样的异常-

public IActionResult About()
    {
        ViewData["Message"] = "Your application description page.";

        try
        {
            throw new Exception("Serilog Testing");
        }
        catch (System.Exception ex)
        {
            this.logger.Error(ex.Message);
        }

        return View();
    }

在运行我的应用程序时，出现以下错误 -

System.InvalidOperationException: Unable to resolve service for type 'Serilog.ILogger' while attempting to activate 'AspNetCore_SeriLog_trial1.Controllers.HomeController'. at Microsoft.Extensions.Internal.ActivatorUtilities.GetService(IServiceProvider sp, Type type, Type requiredBy, Boolean isDefaultParameterRequired)
at lambda_method(Closure , IServiceProvider , Object[] ) at Microsoft.AspNetCore.Mvc.Internal.TypeActivatorCache.CreateInstance[TInstance](IServiceProvider serviceProvider, Type implementationType) at Microsoft.AspNetCore.Mvc.Controllers.DefaultControllerActivator.Create(ControllerContext controllerContext) at Microsoft.AspNetCore.Mvc.Controllers.DefaultControllerFactory.CreateController(ControllerContext context) at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.d__26.MoveNext()

有人可以帮我解决这个问题吗？ Serilog 缺少任何配置吗？

Answer 1

尝试在 Controller 中执行以下操作。

    ILogger<HomeController> logger = null;
    public HomeController(ILogger<HomeController> _logger)
    {
        logger = _logger;
    }