而这是在使用一个StreamReader

而这是在使用一个StreamReader

本文介绍了我可以prevent从锁定一个文本文件,而这是在使用一个StreamReader?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

该StreamReader的锁定,而它的文本文件阅读。
我可以强制的StreamReader在只读或非锁定模式下工作?

我的解决方法是将文件复制到一个临时位置,并从那里读取它,但我会preFER如果可能的话直接使用的StreamReader。任何替代suggetions?

背景:
我写了一个小的应用程序得到一些统计出来的日志文件中。该文件不断被由外部程序更新(几次),让通话AAXXYY。

回顾输出表明我的应用程序可以从写锁定的文件和preventing AAXXYY。

这是我在做什么。

 私人无效btnGetStats_Click(对象发件人,EventArgs的)
    {
        INT countStarts = 0;
        INT countEnds = 0;

        IList的<字符串>会议=新的名单,其中,串>();

        使用(StreamReader的stRead =新的StreamReader(openFileDialog1.FileName,Encoding.Uni code))
        {
            而(!stRead.EndOfStream)
            {
                串线= stRead.ReadLine();
                如果(line.Contains(会话启动))
                {
                    countStarts ++;
                    sessions.Add(line.Substring(line.IndexOf([),line.LastIndexOf(]) -  line.IndexOf([)));
                }
                如果(line.Contains(会议结束))
                {
                    countEnds ++;
                    sessions.Remove(line.Substring(line.IndexOf([),line.LastIndexOf(]) -  line.IndexOf([)));
                }
            }
        }

        txtStarts.Text = countStarts.ToString();
        txtEnds.Text = countEnds.ToString();
        txtDifference.Text =(countStarts  -  countEnds)的ToString();

        listBox1.DataSource =会议;
    }
 

解决方案

您可以通过一个FileStream的StreamReader的,并创建正确的文件共享价值的FileStream。例如:

 使用(var文件=新的FileStream(openFileDialog1.FileName,FileMode.Open,FileAccess.Read,FileShare.ReadWrite))
使用(VAR读卡器=新的StreamReader(文件,Encoding.Uni code)){
}
 

The StreamReader locks a text file whilst it is reading it.
Can I force the StreamReader to work in a "read-only" or "non locking" mode?

My workaround would be to copy the file to a temp location and read it from there but I would prefer to use the StreamReader directly if possible.Any alternative suggetions?

Background:
I've written a small app to get some stats out of a log file. This file is constantly being updating (several times a second) by an outside program lets call AAXXYY.

Reviewing the output suggests that my app may be locking the file and preventing AAXXYY from writing.

This is what I'm doing

    private void btnGetStats_Click(object sender, EventArgs e)
    {
        int countStarts = 0;
        int countEnds = 0;

        IList<string> sessions = new List<string>();

        using(StreamReader stRead = new StreamReader(openFileDialog1.FileName,Encoding.Unicode))
        {
            while(!stRead.EndOfStream)
            {
                string line = stRead.ReadLine();
                if(line.Contains("Session start"))
                {
                    countStarts++;
                    sessions.Add(line.Substring(line.IndexOf("["), line.LastIndexOf("]") - line.IndexOf("[")));
                }
                if (line.Contains("Session end"))
                {
                    countEnds++;
                    sessions.Remove(line.Substring(line.IndexOf("["), line.LastIndexOf("]") - line.IndexOf("[")));
                }
            }
        }

        txtStarts.Text = countStarts.ToString();
        txtEnds.Text = countEnds.ToString();
        txtDifference.Text = (countStarts - countEnds).ToString();

        listBox1.DataSource = sessions;
    }
解决方案

You can pass a FileStream to the StreamReader, and create the FileStream with the proper FileShare value. For instance:

using (var file = new FileStream (openFileDialog1.FileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
using (var reader = new StreamReader (file, Encoding.Unicode)) {
}

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08-03 21:35