分享一個記錄日志的類，可多線程使用。，日志多線程
好久沒寫博客了，今天分享一個自己用的日志類，非原創，借鑒了前輩的一個想法，然後修改來的。
日志我們是必須的，現在程序都是多線程並發了，記日志就有可能出現問題了，lock？影響性能。log4net太重量級了，本日志是一個輕量級的小工具。
廢話不多說，看源碼：
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1 using System;
2 using System.Collections.Generic;
3 using System.IO;
4 using System.Text;
5
6 namespace GEDU.CourseOnline.Common
7 {
8 /// <summary>
9 /// 日志類（多線程版）
10 /// </summary>
11 public class LogHelper
12 {
13 private string _fileName;
14 private static Dictionary<long, long> lockDic = new Dictionary<long, long>();
15
16 /// <summary>
17 /// 獲取或設置文件名稱
18 /// </summary>
19 public string FileName
20 {
21 get { return _fileName; }
22 set { _fileName = value; }
23 }
24
25 /// <summary>
26 /// 構造函數
27 /// </summary>
28 /// <param name="fileName">文件全路徑名</param>
29 public LogHelper(string fileName)
30 {
31 if (string.IsNullOrEmpty(fileName))
32 {
33 throw new Exception("FileName不能為空！");
34 }
35 Create(fileName);
36 _fileName = fileName;
37 }
38
39 /// <summary>
40 /// 創建文件路徑
41 /// </summary>
42 /// <param name="fileName">文件路徑</param>
43 public void Create(string fileName)
44 {
45 var directoryPath = Path.GetDirectoryName(fileName);
46 if (string.IsNullOrEmpty(directoryPath))
47 {
48 throw new Exception("FileName路徑錯誤！");
49 }
50 if (!Directory.Exists(directoryPath))
51 {
52 Directory.CreateDirectory(directoryPath);
53 }
54 }
55
56 /// <summary>
57 /// 寫入文本
58 /// </summary>
59 /// <param name="content">文本內容</param>
60 /// <param name="newLine">換行標記</param>
61 private void Write(string content, string newLine)
62 {
63 using (FileStream fs = new FileStream(_fileName, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite, 8, FileOptions.Asynchronous))
64 {
65 Byte[] dataArray = Encoding.UTF8.GetBytes(content + newLine);
66 bool flag = true;
67 long slen = dataArray.Length;
68 long len = 0;
69 while (flag)
70 {
71 try
72 {
73 if (len >= fs.Length)
74 {
75 fs.Lock(len, slen);
76 lockDic[len] = slen;
77 flag = false;
78 }
79 else
80 {
81 len = fs.Length;
82 }
83 }
84 catch (Exception ex)
85 {
86 while (!lockDic.ContainsKey(len))
87 {
88 len += lockDic[len];
89 }
90 }
91 }
92 fs.Seek(len, SeekOrigin.Begin);
93 fs.Write(dataArray, 0, dataArray.Length);
94 fs.Close();
95 }
96 }
97
98 /// <summary>
99 /// 寫入文件內容
100 /// </summary>
101 /// <param name="content">內容</param>
102 public void WriteLine(string content)
103 {
104 this.Write(content, Environment.NewLine);
105 }
106
107 /// <summary>
108 /// 寫入文件內容 不換行
109 /// </summary>
110 /// <param name="content">內容</param>
111 public void Write(string content)
112 {
113 this.Write(content, "");
114 }
115 }
116 }
View Code
用法：
1 string strPath = HttpContext.Current.Server.MapPath(string.Format("/Log/{0:yyyyMMdd}.txt", DateTime.Today));
2 //string strPath = string.Format(@"D:\Log\{0:yyyyMMdd}.txt", DateTime.Today);
3 LogHelper logHelper = new LogHelper(strPath);
4 logHelper.WriteLine(sWord + " 時間：" + DateTime.Now);
如有不足還請指教。
