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我有一个不断添加的日志（例如每秒 1-5 行或更多），文件可能会变得相当大 20MB+

示例日志文件：

[Wed Aug 26 00:01:48 2015] You try to kick a snake, but miss!
[Wed Aug 26 00:01:50 2015] A snake hits YOU for 3 points of damage.
[Wed Aug 26 00:01:51 2015] You punch a snake for 6 points of damage.
[Wed Aug 26 00:01:51 2015] A decaying skeleton tries to hit Clumsy, but misses!
[Wed Aug 26 00:01:53 2015] A snake hits YOU for 1 point of damage.
[Wed Aug 26 00:01:53 2015] A decaying skeleton tries to hit Clumsy, but misses!
[Wed Aug 26 00:01:54 2015] You gain experience!!
[Wed Aug 26 00:01:54 2015] You punch a snake for 6 points of damage.
[Wed Aug 26 00:01:54 2015] You have slain a snake!
[Wed Aug 26 00:01:56 2015] --You have looted a Snake Egg.--
[Wed Aug 26 00:01:56 2015] A decaying skeleton tries to hit Clumsy, but misses!
[Wed Aug 26 00:01:57 2015] --You have decided to not loot 2 item(s): Snake Fang. The item(s) will be available to anyone after the corpse(s) unlock.--
[Wed Aug 26 00:01:57 2015] --You have decided to not loot 2 item(s): Snake Scales. The item(s) will be available to anyone after the corpse(s) unlock.--
[Wed Aug 26 00:01:59 2015] a decaying skeleton's corpse splinters into hundreds of tiny bone fragments.
[Wed Aug 26 00:01:59 2015] Clumsy crushes a decaying skeleton for 7 points of damage.
[Wed Aug 26 00:01:59 2015] a decaying skeleton has been slain by Clumsy!
[Wed Aug 26 00:01:59 2015] Auto attack is on.
[Wed Aug 26 00:02:00 2015] Grug tells General:2, 'LFM AM/LORD'
[Wed Aug 26 00:02:00 2015] You punch a large rat for 5 points of damage.
[Wed Aug 26 00:02:00 2015] A large rat bites YOU for 1 point of damage.
[Wed Aug 26 00:02:00 2015] You kick a large rat for 1 point of damage.
[Wed Aug 26 00:02:02 2015] You punch a large rat for 2 points of damage.
[Wed Aug 26 00:02:03 2015] A large rat tries to bite YOU, but misses!
[Wed Aug 26 00:02:06 2015] You punch a large rat for 6 points of damage.
[Wed Aug 26 00:02:06 2015] A large rat bites YOU for 1 point of damage.
[Wed Aug 26 00:02:08 2015] a decaying skeleton clatters as it turns towards you.
[Wed Aug 26 00:02:08 2015] <SYSTEMWIDE_MESSAGE>: Gorenaire has been defeated by a group of hardy adventurers! Please join us in congratulating Kyrax along with everyone else who participated in this achievement!
[Wed Aug 26 00:02:08 2015] Clumsy tries to crush a decaying skeleton, but misses!
[Wed Aug 26 00:02:08 2015] A decaying skeleton tries to hit Clumsy, but misses!
[Wed Aug 26 00:02:09 2015] A large rat tries to bite YOU, but YOU dodge!
[Wed Aug 26 00:02:09 2015] You try to punch a large rat, but miss!
[Wed Aug 26 00:02:11 2015] Clumsy crushes a decaying skeleton for 8 points of damage.
[Wed Aug 26 00:02:11 2015] A decaying skeleton hits Clumsy for 2 points of damage.
[Wed Aug 26 00:02:11 2015] You kick a large rat for 1 point of damage.
[Wed Aug 26 00:02:12 2015] A large rat bites YOU for 1 point of damage.
[Wed Aug 26 00:02:13 2015] You gain experience!!
[Wed Aug 26 00:02:13 2015] You punch a large rat for 6 points of damage.
[Wed Aug 26 00:02:13 2015] You have slain a large rat!
[Wed Aug 26 00:02:13 2015] Clumsy crushes a decaying skeleton for 8 points of damage.
[Wed Aug 26 00:02:14 2015] A decaying skeleton hits Clumsy for 3 points of damage.
[Wed Aug 26 00:02:15 2015] --You have decided to not loot 1 item(s): Piece of Rat Fur. The item(s) will be available to anyone after the corpse(s) unlock.--
[Wed Aug 26 00:02:15 2015] --You have decided to not loot 2 item(s): Rat Whiskers. The item(s) will be available to anyone after the corpse(s) unlock.--
[Wed Aug 26 00:02:16 2015] a decaying skeleton's corpse splinters into hundreds of tiny bone fragments.
[Wed Aug 26 00:02:18 2015] Auto attack is on.
[Wed Aug 26 00:02:18 2015] a snake hisses and strikes!
[Wed Aug 26 00:02:18 2015] You punch a snake for 6 points of damage.
[Wed Aug 26 00:02:18 2015] A snake tries to hit YOU, but misses!
[Wed Aug 26 00:02:20 2015] You kick a snake for 1 point of damage.
[Wed Aug 26 00:02:21 2015] You try to punch a snake, but miss!
[Wed Aug 26 00:02:21 2015] A snake hits YOU for 4 points of damage.
[Wed Aug 26 00:02:24 2015] A snake tries to hit YOU, but misses!
[Wed Aug 26 00:02:25 2015] You try to punch a snake, but a snake parries!
[Wed Aug 26 00:02:27 2015] A snake tries to hit YOU, but misses!
[Wed Aug 26 00:02:28 2015] You kick a snake for 1 point of damage.
[Wed Aug 26 00:02:28 2015] You try to punch a snake, but miss!
[Wed Aug 26 00:02:30 2015] A snake hits YOU for 2 points of damage.
[Wed Aug 26 00:02:32 2015] You try to punch a snake, but miss!
[Wed Aug 26 00:02:33 2015] A snake tries to hit YOU, but misses!
[Wed Aug 26 00:02:36 2015] You punch a snake for 5 points of damage.
[Wed Aug 26 00:02:36 2015] A snake hits YOU for 1 point of damage.
[Wed Aug 26 00:02:37 2015] You kick a snake for 1 point of damage.
[Wed Aug 26 00:02:39 2015] A snake hits YOU for 1 point of damage.
[Wed Aug 26 00:02:40 2015] You gain experience!!
[Wed Aug 26 00:02:40 2015] You punch a snake for 6 points of damage.
[Wed Aug 26 00:02:40 2015] You have slain a snake!
[Wed Aug 26 00:02:42 2015] --You have looted a Snake Egg.--
[Wed Aug 26 00:02:42 2015] <SYSTEMWIDE_MESSAGE>: Innoruuk has been defeated by a group of hardy adventurers! Please join us in congratulating Harken along with everyone else who participated in this achievement!
[Wed Aug 26 00:02:43 2015] --You have decided to not loot 1 item(s): Snake Scales. The item(s) will be available to anyone after the corpse(s) unlock.--
[Wed Aug 26 00:02:46 2015] Auto attack is on.
[Wed Aug 26 00:02:46 2015] You punch a large rat for 6 points of damage.
[Wed Aug 26 00:02:46 2015] A large rat tries to bite YOU, but misses!
[Wed Aug 26 00:02:47 2015] You try to kick a large rat, but miss!
[Wed Aug 26 00:02:47 2015] You punch a large rat for 6 points of damage.
[Wed Aug 26 00:02:49 2015] A large rat bites YOU for 1 point of damage.
[Wed Aug 26 00:02:51 2015] You gain experience!!
[Wed Aug 26 00:02:51 2015] You punch a large rat for 5 points of damage.
[Wed Aug 26 00:02:51 2015] You have slain a large rat!
[Wed Aug 26 00:02:53 2015] --You have decided to not loot 1 item(s): Piece of Rat Fur. The item(s) will be available to anyone after the corpse(s) unlock.--
[Wed Aug 26 00:02:53 2015] --You have decided to not loot 2 item(s): Scalded Rat Skin. The item(s) will be available to anyone after the corpse(s) unlock.--
[Wed Aug 26 00:02:56 2015] Auto attack is on.
[Wed Aug 26 00:02:56 2015] You try to punch a large rat, but miss!
[Wed Aug 26 00:02:56 2015] A large rat bites YOU for 1 point of damage.
[Wed Aug 26 00:02:57 2015] You kick a large rat for 1 point of damage.

我将日志文件路径和名称存储在程序的设置中，如下所示：

Properties.Settings.Default.setting_logfolder // Folder Path
Properties.Settings.Default.setting_logfile // File Name

当我单击一个按钮并读取文件时，我需要打开文件，直到再次单击该按钮以停止该过程，而在读取文件时，我需要将找到的行输出到文本框以显示给用户. 发生这种情况时，父程序仍将写入日志文件。

这是我目前拥有的按钮的代码。

    private void btnStart_Click(object sender, EventArgs e)
    {
        if (btnStart.Text == "Start Parsing")
        {
            // change text on button and switch status image
            btnStart.Text = "Stop Parsing";
            pbStatus.Image = Properties.Resources.online;

            string logfile = Properties.Settings.Default.setting_logfolder += Properties.Settings.Default.setting_logfile;

            if (File.Exists(logfile))
            {
                Stream stream = File.Open(logfile, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
                StreamReader streamReader = new StreamReader(stream);
                string str = streamReader.ReadToEnd();
                tbOutput.AppendText(str);
                streamReader.Close();
                stream.Close();
            }
            else
            {
                tbOutput.AppendText(logfile);
            }
        }
        else
        {
            btnStart.Text = "Start Parsing";
            pbStatus.Image = Properties.Resources.offline;
        }
    }

我需要它继续读取文件，直到再次按下按钮，我只需要文件中这样的行

[Wed Aug 26 00:02:08 2015] <SYSTEMWIDE_MESSAGE>: XXXXXXXXX has been defeated by a group of hardy adventurers! Please join us in congratulating XXXXXX along with everyone else who participated in this achievement!
4

4 回答 4

1

这是使用FileWatcher 类的简单方法

 public static Watchfile() 
 {
         FileSystemWatcher watch = new FileSystemWatcher();
         watch.Path = @"C:\";
         watch.Filter = "log.txt";
         watch.NotifyFilter = NotifyFilters.LastAccess |    
         NotifyFilters.LastWrite; 

        watch.Changed += new FileSystemEventHandler(OnChanged);
       watch.EnableRaisingEvents = true;
  }


 private static void OnChanged(object source, FileSystemEventArgs e)
 {


    string line;
         if (e.FullPath == @"C:\log.txt")
         {
             Regex _regex = new Regex(@"\[[\w :]+\] <SYSTEMWIDE_MESSAGE>: \w+ has been defeated by a group of hardy adventurers! Please join us in congratulating \w+ along with everyone else who participated in this achievement!");
             System.IO.StreamReader file =
                       new System.IO.StreamReader(@"C:\log.txt");

             while ((line = file.ReadLine()) != null)
             {
                 Match match = _regex.Match(line);
                 if (match.Success)
                 {

                     //Match Found

                 }


             }

             file.Close();
         }


 }
于 2015-09-21T17:44:06.510 回答
1

我的回答“对于 C#”

要查找包含系统范围消息的任何行，请使用：

\[[\w :]+\] <SYSTEMWIDE_MESSAGE>

对于该消息，但允许使用不同的名称，请使用：

\[[\w :]+\] <SYSTEMWIDE_MESSAGE>: \w+ has been defeated by a group of hardy adventurers! Please join us in congratulating \w+ along with everyone else who participated in this achievement!

这些都假设用户/字符名称可以包含字母、数字或下划线

您当前的算法执行 a ReadToEnd()，它不会读取单个行并一次咳出一个，这似乎是您想要做的（？！也许！？？！）。相反，它将读取到流（文件）的末尾，然后咳出整个文件。

使用 FileSystemWatcher 的方法在此对相关问题的回答中进行了简要描述- FileSystemWatcher 有一些注意事项，但它应该是一种更“纯粹的 .Net 方法”

替代解决方案（Powershell）

如果您不需要 GUI，而您只是对将这些信息显示在屏幕上以便您可以做一些事情感兴趣，那么快速而肮脏的解决方案实际上是 PowerShell 领域中的一行。打开一个 PowerShell 提示符（或创建一个脚本）并（假设我们使用的是一个幽默命名的日志文件chase.dat和一个选择的正则表达式而不是<#regex#>，请使用以下代码：

cat chase.dat -tail 1 -wait | ?{$_ -match '<#regex#>'}

放置一个适当的正则表达式代替你的文件名，它会吐出任何与你的正则表达式匹配的新行，因为它们被写入文件<#regex#>。如果你有兴趣我可以解释一下...chase.dat

图形用户界面！

如果您确实想结合 GUI 和 PowerShell，上述 PS 脚本行将被传递给本文概述的类中的“ PipelineExecutor ”构造函数，然后每当脚本返回更多（在这种情况下过滤）文本。TextBox.Text

就这样做了，它就像一个魅力！

于 2015-09-21T16:46:51.300 回答
0

好的，首先，如果您要解析的日志文件可能太大而无法保存在内存中（大多数情况下不是 20mb），然后使用 File.OpenText 并以块的形式读取它或线。这意味着您不需要将整个文本文件加载到内存中。其次，我会将阅读逻辑删除到它自己的类或函数中。如果您正在运行 Windows 窗体或 WPF，并且想要在找到一行时更新 UI，那么您需要在单独的线程/任务上执行此读取操作，以使您的 UI 更新而不锁定它。使用Dispatcher该类从后台任务更新您的 UI。

然后，您的正则表达式将需要基于您要捕获的精确行。在我看来，您可以忽略一行开头的方括号中的所有内容，然后断言：

\w+ has been defeated by a group of hardy adventurers! Please join us in congratulating \w+ along with everyone else who participated in this achievement!$

编辑：

从您的文件共享选项看来，日志文件可能正在增长？如果这是正确的，请避免逐行阅读，因为您可以阅读部分行。如果您在流中缓存您的位置，这可能意味着您失去了潜在的匹配。相反，读取一个块，检查Environment.NewLine并将其解析为正则表达式引擎中的一行。

于 2015-09-21T16:53:46.807 回答
-1

尝试这个：

-using (var fileStream = new FileStream("YOUR FILE", FileMode.Open, FileAccess.Read, FileShare.None))
{                  
    using (var streamReader = new StreamReader(fileStream))
    {
        string line;
        while((line = reader.ReadLine()) != null)
        {
          if(line == "YOUR TEXT")
          {
           // Do the rest
          }
        }
    }
}

您必须指定您的特定模式才能完成此示例。

于 2015-09-21T17:25:43.967 回答