C#简单的LogHelper

适用于不想使用log4net等第三方的Log工具的LogHelper。正规的还是要使用《C# 工具类LogHelper》的这种做法。

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace FrameworkConsoleTest
{
    public class BaseLogHelper
    {
        private static object _loglocker = new object();//锁对象
        /// <summary>
        /// 写入日志文件
        /// </summary>
        /// <param name="input">输入内容</param>
        public static void WriteLogFile(string input)
        {
            lock (_loglocker)
            {
                FileStream fs = null;
                StreamWriter sw = null;
                try
                {
                    FileInfo fileInfo = null;
                    fileInfo = CreateFileInfo("debug_");
                    fs = fileInfo.OpenWrite();
                    sw = new StreamWriter(fs);
                    sw.BaseStream.Seek(0, SeekOrigin.End);
                    sw.Write("Log Entry : ");
                    sw.Write("{0}", DateTime.Now.ToString("yyyy年MM月dd日 HH:mm:ss"));
                    sw.Write(Environment.NewLine);
                    sw.Write(input);
                    sw.Write(Environment.NewLine);
                    sw.Write("------------------------------------");
                    sw.Write(Environment.NewLine);
                }
                catch (Exception ex)
                {
                    //throw ex;
                }
                finally
                {
                    if (sw != null)
                    {
                        sw.Flush();
                        sw.Close();
                    }
                    if (fs != null)
                    {
                        fs.Close();
                    }
                }
            }
        }
        protected static FileInfo CreateFileInfo(string ex)
        {
            FileInfo fileInfo = null;
            for (int i = 0; ; i++)
            {
                string fileName = GetMapPath("/Log/") + ex + DateTime.Now.ToString("yyyyMMdd") + "_" + i + ".log";

                fileInfo = new FileInfo(fileName);
                if (!fileInfo.Directory.Exists)
                {
                    fileInfo.Directory.Create();
                }
                if (!fileInfo.Exists)
                {
                    fileInfo.Create().Close();
                }
                else if (fileInfo.Length > 2048 * 1000)
                {
                    fileInfo = null;
                }
                if (fileInfo != null)
                    return fileInfo;
            }

        }
        /// <summary>
        /// 获得当前绝对路径
        /// </summary>
        /// <param name="strPath">指定的路径</param>
        /// <returns>绝对路径</returns>
        public static string GetMapPath(string strPath)
        {
            if (strPath.ToLower().StartsWith("http://"))
            {
                return strPath;
            }
            else //非web程序引用
            {
                strPath = strPath.Replace("/", "\\");
                if (strPath.StartsWith("\\"))
                {
                    strPath = strPath.Substring(strPath.IndexOf('\\', 1)).TrimStart('\\');
                }
                return System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, strPath);
            }
        }
    }
}