1 using System;
  2 using System.Collections.Generic;
  3 using System.Text;
  4 using System.IO;
  5 using System.Diagnostics;
  6 
  7 namespace UtilityClass
  8 {
  9     public class TraceLog : TraceListener
 10     {
 11         // 初始化时给定一个日志文件位置
 12         private string filePath;
 13 
 14         public TraceLog()
 15             : this("")
 16         { }
 17 
 18         public TraceLog(string filepath)
 19         {
 20             if (filepath.IndexOfAny(Path.GetInvalidFileNameChars()) > -1)
 21             {
 22                 ShowMsg.ShowErr(null, "指定路径无效！\r\n\r\n请重新设置日志文件路径！");
 23                 Trace.Listeners.Clear();
 24                 return;
 25             }
 26             filePath = ConvertX.IsNullOrEmpty(filepath) ? AppDomain.CurrentDomain.BaseDirectory + "\\Error.Log" : Path.GetFullPath(filepath);
 27         }
 28 
 29         /// <summary>
 30         /// 保存 错误信息 到指定日志
 31         ///  此方法已重写 实际效果同 WriteLine
 32         /// </summary>
 33         public override void Write(string message)
 34         {
 35             File.AppendAllText(filePath, DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss") + Environment.NewLine + message + Environment.NewLine);
 36         }
 37 
 38         /// <summary>
 39         /// 保存 错误信息 到指定日志
 40         /// </summary>
 41         public override void WriteLine(string message)
 42         {
 43             File.AppendAllText(filePath, DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss") + Environment.NewLine + message + Environment.NewLine);
 44         }
 45 
 46         /// <summary>
 47         /// 输入一个 Exception 对象
 48         ///  它将在日志文件中保存 错误信息 和 堆栈信息
 49         /// </summary>
 50         public override void WriteLine(object o)
 51         {
 52             string msg = "";
 53             Exception ex = o as Exception;
 54             if (ex != null)
 55             {
 56                 msg = ex.Message + Environment.NewLine;
 57                 msg += ex.StackTrace;
 58             }
 59             else if (o != null)
 60             {
 61                 msg = o.ToString();
 62             }
 63             WriteLine(msg);
 64         }
 65 
 66         /// <summary>
 67         /// 输入一个 错误信息 和一个 分类名称
 68         ///  它将在日志文件中保存 错误信息
 69         /// </summary>
 70         public override void WriteLine(string message, string category)
 71         {
 72             string msg = "";
 73             if (!ConvertX.IsNullOrEmpty(category))
 74             {
 75                 msg = category + ":";
 76             }
 77             msg += message;
 78             WriteLine(msg);
 79         }
 80 
 81         /// <summary>
 82         /// 输入一个 Exception 对象和一个 分类名称
 83         ///  它将在日志文件中保存 错误信息 和 堆栈信息
 84         /// </summary>
 85         public override void WriteLine(object o, string category)
 86         {
 87             string msg = "";
 88             if (!ConvertX.IsNullOrEmpty(category))
 89             {
 90                 msg = category + ":";
 91             }
 92             if (o is Exception)
 93             {
 94                 var ex = (Exception)o;
 95                 msg += ex.Message + Environment.NewLine;
 96                 msg += ex.StackTrace;
 97             }
 98             else if (o != null)
 99             {
100                 msg = o.ToString();
101             }
102             WriteLine(msg);
103         }
104     }
105 }