前言
之前.net framework用的ErrorLog帮助类,对于监控错误形成日志,内容非常清晰,想在.net core2.2中继续用,但是有很多不一样的地方,所以想总结一下.
首先需要HttpContext,而.net core 与之前的.net framework有所不同,封装一下便于使用
建两个静态类 HttpContext
using Microsoft.AspNetCore.Http;namespace logs{ ???public static class HttpContext ???{ ???????private static IHttpContextAccessor _accessor; ???????public static Microsoft.AspNetCore.Http.HttpContext Current => _accessor.HttpContext; ???????internal static void Configure(IHttpContextAccessor accessor) ???????{ ???????????_accessor = accessor; ???????} ???}}using Microsoft.AspNetCore.Builder;using Microsoft.AspNetCore.Http;using Microsoft.Extensions.DependencyInjection;namespace logs{ ???public static class StaticHttpContextExtensions ???{ ???????public static void AddHttpContextAccessor(this IServiceCollection services) ???????{ ???????????services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>(); ???????} ???????public static IApplicationBuilder UseStaticHttpContext(this IApplicationBuilder app) ???????{ ???????????var httpContextAccessor = app.ApplicationServices.GetRequiredService<IHttpContextAccessor>(); ???????????HttpContext.Configure(httpContextAccessor); ???????????return app; ???????} ???}}在Startup.cs中注入
public void ConfigureServices(IServiceCollection services) ???????{ ???????????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); ???????????//DI 注入 ???????????services.AddHttpContextAccessor(); ???????????????????}新建一个ErrorLog类
using System;using System.IO;namespace logs{ ???public class ErrorLog ???{ ???????public static void WriteLog(Exception ex) ???????{ ???????????//读取二级 ???????????var logsPath=AppConfigurtaionServices.Configuration["Path:LogsPath"]; ???????????string errorTime = "异常时间：" + DateTime.Now.ToString(); ???????????string errorAddress = "异常地址：" + HttpContext.Current.Request.Scheme.ToString()+"://"+ HttpContext.Current.Request.Host.ToString()+ HttpContext.Current.Request.Path.ToString(); ???????????string errorInfo = "异常信息：" + ex.Message; ???????????string errorSource = "错误源：" + ex.Source; ???????????string errorType = "运行类型：" + ex.GetType(); ???????????string errorFunction = "异常函数：" + ex.TargetSite; ???????????string errorTrace = "堆栈信息：" + ex.StackTrace; ????????????????????//HttpContext.Current.Server.ClearError(); ???????????System.IO.StreamWriter writer = null; ???????????try ???????????{ ???????????????//写入日志 ????????????????string path = string.Empty; ??????????????path= System.AppDomain.CurrentDomain.BaseDirectory.ToString()+ logsPath; ???????????????//path = HttpContext.Current.Server.MapPath("~/ErrorLogs/"); ???????????????//不存在则创建错误日志文件夹 ???????????????if (!Directory.Exists(path)) ???????????????{ ???????????????????Directory.CreateDirectory(path); ???????????????} ???????????????path += string.Format(@"\{0}.txt", DateTime.Now.ToString("yyyy-MM-dd")); ???????????????writer = !System.IO.File.Exists(path) ? System.IO.File.CreateText(path) : System.IO.File.AppendText(path); //判断文件是否存在，如果不存在则创建，存在则添加 ???????????????writer.WriteLine("用户IP:" + HttpContext.Current.Connection.RemoteIpAddress.ToString()); ???????????????writer.WriteLine(errorTime); ???????????????writer.WriteLine(errorAddress); ???????????????writer.WriteLine(errorInfo); ???????????????writer.WriteLine(errorSource); ???????????????writer.WriteLine(errorType); ???????????????writer.WriteLine(errorFunction); ???????????????writer.WriteLine(errorTrace); ???????????????writer.WriteLine("********************************************************************************************"); ???????????} ???????????finally ???????????{ ???????????????if (writer != null) ???????????????{ ???????????????????writer.Close(); ???????????????} ???????????} ???????} ???}}新建控制器测试
???????public IActionResult Index() ???????{ ???????????try ???????????{ ???????????????var b = 0; ???????????????int a = 10 / b; ???????????} ???????????catch (Exception ex) ???????????{ ?????????????ErrorLog.WriteLog(ex); ???????????} ???????????return View(); ???????}新建视图运行,在\bin\Debug\netcoreapp2.2\下创建logs文件夹与日期命名的txt文件 结果如下
最后 安利一个特别棒的appsetting读取类
using System;using System.Collections.Generic;using System.Linq;using System.Threading.Tasks;namespace logs{ ???using Microsoft.Extensions.Configuration; ???using Microsoft.Extensions.Configuration.Json; ???/// <summary> ???/// 读取appsetting.json ???/// </summary> ???public class AppConfigurtaionServices ???{ ???????public static IConfiguration Configuration { get; set; } ???????static AppConfigurtaionServices() ???????{ ???????????//ReloadOnChange = true 当appsettings.json被修改时重新加载 ???????????????????????Configuration = new ConfigurationBuilder() ???????????.Add(new JsonConfigurationSource { Path = "appsettings.json", ReloadOnChange = true }) ???????????.Build(); ???????} ???}} ????????//调用 ???????// AppConfigurtaionServices.Configuration.GetConnectionString("conn"); ???????//读取一级 ???????// AppConfigurtaionServices.Configuration["str"]; ???????//读取二级 ???????// AppConfigurtaionServices.Configuration["Path:LogsPath"]; ???????//注意，如果AppConfigurtaionServices类中抛出FileNotFoundException异常，说明目录下未找到appsettings.json文件，这时请在项目appsettings.json文件上右键——属性——将“复制到输出目录”项的值改为“如果较新则复制”即可。
.net core 自制错误日志
原文地址：https://www.cnblogs.com/LiChen19951127/p/10475148.html