TraceLog.cs 累积 C#

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Diagnostics;

namespace UtilityClass
{
    public class TraceLog : TraceListener
    {
        // 初始化时给定一个日志文件位置
        private string filePath;

        public TraceLog()
            : this("")
        { }

        public TraceLog(string filepath)
        {
            if (filepath.IndexOfAny(Path.GetInvalidFileNameChars()) > -1)
            {
                ShowMsg.ShowErr(null, "指定路径无效！

请重新设置日志文件路径！");
                Trace.Listeners.Clear();
                return;
            }
            filePath = ConvertX.IsNullOrEmpty(filepath) ? AppDomain.CurrentDomain.BaseDirectory + "\Error.Log" : Path.GetFullPath(filepath);
        }

        /// <summary>
        /// 保存 错误信息 到指定日志
        ///  此方法已重写 实际效果同 WriteLine
        /// </summary>
        public override void Write(string message)
        {
            File.AppendAllText(filePath, DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss") + Environment.NewLine + message + Environment.NewLine);
        }

        /// <summary>
        /// 保存 错误信息 到指定日志
        /// </summary>
        public override void WriteLine(string message)
        {
            File.AppendAllText(filePath, DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss") + Environment.NewLine + message + Environment.NewLine);
        }

        /// <summary>
        /// 输入一个 Exception 对象
        ///  它将在日志文件中保存 错误信息 和 堆栈信息
        /// </summary>
        public override void WriteLine(object o)
        {
            string msg = "";
            Exception ex = o as Exception;
            if (ex != null)
            {
                msg = ex.Message + Environment.NewLine;
                msg += ex.StackTrace;
            }
            else if (o != null)
            {
                msg = o.ToString();
            }
            WriteLine(msg);
        }

        /// <summary>
        /// 输入一个 错误信息 和一个 分类名称
        ///  它将在日志文件中保存 错误信息
        /// </summary>
        public override void WriteLine(string message, string category)
        {
            string msg = "";
            if (!ConvertX.IsNullOrEmpty(category))
            {
                msg = category + ":";
            }
            msg += message;
            WriteLine(msg);
        }

        /// <summary>
        /// 输入一个 Exception 对象和一个 分类名称
        ///  它将在日志文件中保存 错误信息 和 堆栈信息
        /// </summary>
        public override void WriteLine(object o, string category)
        {
            string msg = "";
            if (!ConvertX.IsNullOrEmpty(category))
            {
                msg = category + ":";
            }
            if (o is Exception)
            {
                var ex = (Exception)o;
                msg += ex.Message + Environment.NewLine;
                msg += ex.StackTrace;
            }
            else if (o != null)
            {
                msg = o.ToString();
            }
            WriteLine(msg);
        }
    }
}