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()) > -)
             {
                 ShowMsg.ShowErr(null, "指定路径无效！\r\n\r\n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);
         }
     }
 }