winform 应用log4net做日志记录到mysql

1.nuget装log4net

2.nuget控件台装 mysql.data

　　Install-Package mysql.data -version 6.8.3 (太高的版本用不了，切记)

3.修改app.config文件，在configuration节点下添加

<system.data>
    <DbProviderFactories>
      <remove invariant="MySql.Data.MySqlClient" />
      <add name="MySQL Data Provider" invariant="MySql.Data.MySqlClient" description=".Net Framework Data Provider for MySQL" type="MySql.Data.MySqlClient.MySqlConnection, MySql.Data, Version=6.8.3.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" />
    </DbProviderFactories>
  </system.data>

using MySql.Data.MySqlClient;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Common
{
    public class LogHelper
    {
        public static readonly log4net.ILog loginfo = log4net.LogManager.GetLogger("loginfo");

        public static readonly log4net.ILog logerror = log4net.LogManager.GetLogger("logerror");

        public static void WriteLog(string info)
        {
            if (loginfo.IsInfoEnabled)
            {
                loginfo.Info(info);
            }
        }
        /// <summary>
        /// 错误记录
        /// </summary>
        /// <param name="info">附加信息</param>
        /// <param name="ex">错误</param>
        public static void ErrorLog(string info, Exception ex)
        {
            if (!string.IsNullOrEmpty(info) && ex == null)
            {
                logerror.ErrorFormat("【附加信息】 : {0}<br>", new object[] { info });
            }
            else if (!string.IsNullOrEmpty(info) && ex != null)
            {
                string errorMsg = BeautyErrorMsg(ex);
                logerror.ErrorFormat("【附加信息】 : {0}<br>{1}", new object[] { info, errorMsg });
            }
            else if (string.IsNullOrEmpty(info) && ex != null)
            {
                string errorMsg = BeautyErrorMsg(ex);
                logerror.Error(errorMsg);
            }
        }
        /// <summary>
        /// 美化错误信息
        /// </summary>
        /// <param name="ex">异常</param>
        /// <returns>错误信息</returns>
        private static string BeautyErrorMsg(Exception ex)
        {
            string errorMsg = string.Format("【异常类型】：{0} <br>【异常信息】：{1} <br>【堆栈调用】：{2}", new object[] { ex.GetType().Name, ex.Message, ex.StackTrace });
            errorMsg = errorMsg.Replace("\r\n", "<br>");
            errorMsg = errorMsg.Replace("位置", "<strong style=\"color:red\">位置</strong>");
            return errorMsg;
        }

    }
}

using Common;
using log4net.Appender;
using log4net.Config;
using log4net.Layout;
using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace testLog4N
{
    public class LogExceptionHandle
    {
        private static string _ConnectionString = "server=xxx;port=3306;database=xxx;uid=xxx;pwd=xxx;";
        /// <summary>
        /// 绑定程序中的异常处理
        /// </summary>
        public static void BindExceptionHandler()
        {
            //设置应用程序处理异常方式：ThreadException处理
            Application.SetUnhandledExceptionMode(UnhandledExceptionMode.CatchException);
            //处理UI线程异常
            Application.ThreadException += new System.Threading.ThreadExceptionEventHandler(Application_ThreadException);
            //处理未捕获的异常
            AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler(CurrentDomain_UnhandledException);
            //加载log4net组件
            LoadADONetAppender();
        }
        /// <summary>
        /// 处理UI线程异常
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        static void Application_ThreadException(object sender, System.Threading.ThreadExceptionEventArgs e)
        {
            LogHelper.ErrorLog(null, e.Exception as Exception);
        }
        /// <summary>
        /// 处理未捕获的异常
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        static void CurrentDomain_UnhandledException(object sender, UnhandledExceptionEventArgs e)
        {
            LogHelper.ErrorLog(null, e.ExceptionObject as Exception);
        }
        /// <summary>
        /// 使用SQLSERVER记录异常日志
        /// </summary>
        /// <Author>Ryanding</Author>
        /// <date>2011-05-01</date>
        public static void LoadADONetAppender()
        {

            log4net.Repository.Hierarchy.Hierarchy hier =
              log4net.LogManager.GetRepository() as log4net.Repository.Hierarchy.Hierarchy;

            if (hier != null)
            {
                log4net.Appender.AdoNetAppender adoAppender = new log4net.Appender.AdoNetAppender();
                adoAppender.Name = "AdoNetAppender";
                adoAppender.CommandType = CommandType.Text;
                adoAppender.BufferSize = ;
                adoAppender.ConnectionType = "MySql.Data.MySqlClient.MySqlConnection, MySql.Data, Version=6.8.3.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d";
                adoAppender.ConnectionString = _ConnectionString;
                adoAppender.CommandText = @"INSERT INTO `ddylog` (`Date`, `Thread`, `Level`, `Logger`, `Method`, `Location`,`Message`,`Exception`) VALUES (@Date, @Thread, @Level, @Logger, @Method,@Location,@Message,@Exception)";
                adoAppender.AddParameter(new AdoNetAppenderParameter
                {
                    ParameterName = "@Date",
                    DbType = System.Data.DbType.DateTime,
                    Layout = new log4net.Layout.RawTimeStampLayout()
                });
                adoAppender.AddParameter(new AdoNetAppenderParameter
                {
                    ParameterName = "@Thread",
                    DbType = System.Data.DbType.String,
                    Size = ,
                    Layout = new Layout2RawLayoutAdapter(
                        new PatternLayout("%thread")
                        )
                });
                adoAppender.AddParameter(new AdoNetAppenderParameter
                {
                    ParameterName = "@Level",
                    DbType = System.Data.DbType.String,
                    Size = ,
                    Layout = new Layout2RawLayoutAdapter(
                        new PatternLayout("%level")
                        )
                });
                adoAppender.AddParameter(
                    new AdoNetAppenderParameter
                    {
                        ParameterName = "@Logger",
                        DbType = System.Data.DbType.String,
                        Size = ,
                        Layout = new Layout2RawLayoutAdapter(
                            new PatternLayout("%logger")
                            )
                    });
                adoAppender.AddParameter(new AdoNetAppenderParameter
                {
                    ParameterName = "@Method",
                    DbType = System.Data.DbType.String,
                    Size = ,
                    Layout = new Layout2RawLayoutAdapter(new PatternLayout("%method")
                    )
                });
                adoAppender.AddParameter(new AdoNetAppenderParameter
                {
                    ParameterName = "@Location",
                    DbType = System.Data.DbType.String,
                    Size = ,
                    Layout = new Layout2RawLayoutAdapter(
                        new PatternLayout("%location")
                        )
                });
                adoAppender.AddParameter(
                    new AdoNetAppenderParameter
                    {
                        ParameterName = "@Message",
                        DbType = System.Data.DbType.String,
                        Size = ,
                        Layout = new Layout2RawLayoutAdapter(
                            new PatternLayout("%message")
                            )
                    });
                adoAppender.AddParameter(
                    new AdoNetAppenderParameter
                    {
                        ParameterName = "@Exception",
                        DbType = System.Data.DbType.String,
                        Size = ,
                        Layout = new Layout2RawLayoutAdapter(new ExceptionLayout()
                        )
                    });
                adoAppender.ActivateOptions();
                BasicConfigurator.Configure(adoAppender);
            }
        }
        /// <summary>
        /// 使用文本记录异常日志
        /// </summary>
        /// <Author>Ryanding</Author>
        /// <date>2011-05-01</date>
        public static void LoadFileAppender()
        {
            string currentPath = AppDomain.CurrentDomain.BaseDirectory;
            string txtLogPath = string.Empty;
            string iisBinPath = AppDomain.CurrentDomain.RelativeSearchPath;

            if (!string.IsNullOrEmpty(iisBinPath))
                txtLogPath = Path.Combine(iisBinPath, "ErrorLog.html");
            else
                txtLogPath = Path.Combine(currentPath, "ErrorLog.html");

            log4net.Repository.Hierarchy.Hierarchy hier =
             log4net.LogManager.GetRepository() as log4net.Repository.Hierarchy.Hierarchy;

            FileAppender fileAppender = new FileAppender();
            fileAppender.Name = "LogFileAppender";
            fileAppender.File = txtLogPath;
            fileAppender.AppendToFile = true;

            PatternLayout patternLayout = new PatternLayout();
            patternLayout.ConversionPattern = "&lt;HR COLOR=red&gt;%n【异常时间】：%d [%t] &lt;BR&gt;%n【异常级别】：%-5p &lt;BR&gt;%n【异 常 类】：%c [%x] &lt;BR&gt;%n%m &lt;BR&gt;%n &lt;HR Size=1&gt;";
            patternLayout.ActivateOptions();
            fileAppender.Layout = patternLayout;

            //选择UTF8编码，确保中文不乱码。
            fileAppender.Encoding = Encoding.UTF8;

            fileAppender.ActivateOptions();
            BasicConfigurator.Configure(fileAppender);

        }
    }
}

使用：

LogExceptionHandle.BindExceptionHandler();//绑定程序中的异常处理