c# - - - 日志写入本地文件

日志写入类

using System;
using System.IO;

namespace My.Utilte.Log
{
    public class LogManager
    {


        private static string logPath = "log";
        /// <summary>
        /// 保存日志的文件夹
        /// </summary>
        public static string LogPath
        {
            get
            {
                return logPath;
            }
            set
            {
                logPath = value;
            }
        }

        /// <summary>
        /// 写日志
        /// </summary>
        public static void WriteLog(string msg)
        {
            WriteLog("", msg);
        }

        /// <summary>
        /// 写日志
        /// </summary>
        private static void WriteLog(string prev, string msg)
        {
            try
            {
                if (!Directory.Exists(LogPath))
                {
                    Directory.CreateDirectory(LogPath);
                }
                string mFileName = DateTime.Now.ToString("yyyyMMdd") + ".Log";
                FileInfo fi = new FileInfo(LogPath + "/" + mFileName);
                if (!fi.Exists)
                {
                    using (StreamWriter sw = fi.CreateText())
                    {
                        sw.WriteLine("[" + DateTime.Now + "] - " + msg);
                        sw.Close();
                    }
                }
                else
                {
                    using (StreamWriter sw = fi.AppendText())
                    {
                        sw.WriteLine("[" + DateTime.Now + "] - " + msg);
                        sw.Close();
                    }
                }
            }
            catch (Exception err)
            {

            }
        }

    }
}

使用

 catch (Exception ex)
 {
     LogManager.WriteLog("查询数据异常:" + ex.Message);
     return null;
 }