ASP.NET Core使用NLog记录日志_实用技巧_

using Microsoft.AspNetCore.Hosting; using Microsoft.Extensions.Hosting; using NLog.Web; namespace NLogDemo { public class Program { public static void Main(string[] args) { CreateHostBuilder(args).Build().Run(); } public static IHostBuilder CreateHostBuilder(string[] args) => Host.CreateDefaultBuilder(args) .ConfigureWebHostDefaults(webBuilder => { webBuilder.UseStartup(); }) // 配置使用NLog .UseNLog(); } }

using Microsoft.AspNetCore.Mvc; using Microsoft.Extensions.Logging; namespace NLogDemo.Controllers { [Route("api/[controller]")] [ApiController] public class NLogTestController : ControllerBase { private readonly ILogger _logger; public NLogTestController(ILogger logger) { _logger = logger; } [HttpGet] public IActionResult Get() { _logger.LogError("这是错误信息"); _logger.LogDebug("这是调试信息"); _logger.LogInformation("这是提示信息"); return Ok(); } } }

using Microsoft.AspNetCore.Hosting; using Microsoft.Extensions.Hosting; using NLog.Web; namespace NLogDemo { public class Program { public static void Main(string[] args) { // 设置读取指定位置的nlog.config文件 NLogBuilder.ConfigureNLog("XmlConfig/nlog.config"); CreateHostBuilder(args).Build().Run(); } public static IHostBuilder CreateHostBuilder(string[] args) => Host.CreateDefaultBuilder(args) .ConfigureWebHostDefaults(webBuilder => { webBuilder.UseStartup(); }) // 配置使用NLog .UseNLog(); } }

using System; namespace Nlog.Framework.Log { /// 
 /// 日志消息 /// 
 public class LogMessage { /// 
 /// IP /// 
 public string IpAddress { get; set; } /// 
 /// 操作人 /// 
 public string OperationName { get; set; } /// 
 /// 操作时间 /// 
 public DateTime OperationTime { get; set; } /// 
 /// 日志信息 /// 
 public string LogInfo { get; set; } /// 
 /// 跟踪信息 /// 
 public string StackTrace { get; set; } } }

using System.Text; namespace Nlog.Framework.Log { /// 
 /// 格式化输出样式 /// 
 public class LogFormat { public static string ErrorFormat(LogMessage logMessage) { StringBuilder strInfo = new StringBuilder(); strInfo.Append("1. 操作时间: " + logMessage.OperationTime +" \r\n"); strInfo.Append("2. 操作人: " + logMessage.OperationName + " \r\n"); strInfo.Append("3. Ip : " + logMessage.IpAddress +"\r\n"); strInfo.Append("4. 错误内容: " + logMessage.LogInfo + "\r\n"); strInfo.Append("5. 跟踪: " + logMessage.StackTrace + "\r\n"); strInfo.Append("-----------------------------------------------------------------------------------------------------------------------------\r\n"); return strInfo.ToString(); } } }

using System; namespace Nlog.Framework.Log { public interface INLogHelper { void LogError(Exception ex); } }

using Microsoft.AspNetCore.Http; using Microsoft.Extensions.Logging; using System; namespace Nlog.Framework.Log { public class NLogHelper : INLogHelper { //public static Logger logger { get; private set; } private readonly IHttpContextAccessor _httpContextAccessor; private readonly ILogger _logger; public NLogHelper(IHttpContextAccessor httpContextAccessor, ILogger logger) { _httpContextAccessor = httpContextAccessor; _logger = logger; } public void LogError(Exception ex) { LogMessage logMessage = new LogMessage(); logMessage.IpAddress = _httpContextAccessor.HttpContext.Request.Host.Host; if (ex.InnerException != null) logMessage.LogInfo = ex.InnerException.Message; else logMessage.LogInfo = ex.Message; logMessage.StackTrace = ex.StackTrace; logMessage.OperationTime = DateTime.Now; logMessage.OperationName = "admin"; _logger.LogError(LogFormat.ErrorFormat(logMessage)); } } }

using Microsoft.AspNetCore.Mvc.Filters; using Nlog.Framework.Log; using System.Threading.Tasks; namespace NLogDemo.Filter { /// 
 /// 异步版本自定义全局异常过滤器 /// 
 public class CustomerGlobalExceptionFilterAsync : IAsyncExceptionFilter { private readonly INLogHelper _logHelper; public CustomerGlobalExceptionFilterAsync(INLogHelper logHelper) { _logHelper = logHelper; } /// 
 /// 重新OnExceptionAsync方法 /// 
 /// 异常信息 ///  public Task OnExceptionAsync(ExceptionContext context) { // 如果异常没有被处理，则进行处理 if (context.ExceptionHandled == false) { // 记录错误信息 _logHelper.LogError(context.Exception); // 设置为true，表示异常已经被处理了，其它捕获异常的地方就不会再处理了 context.ExceptionHandled = true; } return Task.CompletedTask; } } }

using Microsoft.AspNetCore.Mvc; using Microsoft.Extensions.Logging; namespace NLogDemo.Controllers { [Route("api/[controller]")] [ApiController] public class ValuesController : ControllerBase { /// 
 /// 日志 /// 
 private readonly ILogger _logger; public ValuesController(ILogger logger) { _logger = logger; } [HttpGet] public IActionResult Test() { _logger.LogError("测试封装日志"); int
                
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