C#实现多线程写入同一个文件的方法

本文实例讲述了C#实现多线程写入同一个文件的方法。分享给大家供大家参考。具体实现方法如下：

namespace WfpApp

{

public partial class Form2 : Form

{

object obj = new object();

public Form2()

{

InitializeComponent();

System.Threading.Thread thread;

string[] users = new string[] { "zkk", "admin", "administrator", "soft", "iany", "nec", "necsl" };

for (int i = 0; i < users.Length; i++)

{

thread = new System.Threading.Thread(new System.Threading.ParameterizedThreadStart(WriteLock));

thread.Start(users[i]);

}

}

public void WriteThread(object user)

{

string path = System.Windows.Forms.Application.StartupPath + "\\app\\";

if (!System.IO.Directory.Exists(path))

System.IO.Directory.CreateDirectory(path);

path = path + "\\" + DateTime.Now.ToString("yyyyMMdd") + ".txt";

StringBuilder sb = new StringBuilder();

sb.AppendLine("----------------------------" + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff") + "--------------------------");

sb.AppendLine(user.ToString());

sb.AppendLine("---------------------------------------------------------------------------------");

sb.AppendLine();

//if (!System.IO.File.Exists(path))

// System.IO.File.Create(path).Close();

System.IO.FileStream fileStream = new System.IO.FileStream(path, System.IO.FileMode.Append, System.IO.FileAccess.Write, System.IO.FileShare.ReadWrite);

System.IO.StreamWriter sw = new System.IO.StreamWriter(fileStream, Encoding.Default);

sw.Write(sb.ToString());

sw.Close();

sw.Dispose();

fileStream.Close();

fileStream.Dispose();

}

public void WriteLock(object user)

{

lock (obj)

{

string path = System.Windows.Forms.Application.StartupPath + "\\app\\";

if (!System.IO.Directory.Exists(path))

System.IO.Directory.CreateDirectory(path);

path = path + "\\" + DateTime.Now.ToString("yyyyMMdd") + ".txt";

StringBuilder sb = new StringBuilder();

sb.AppendLine("----------------------------" + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff") + "--------------------------");

sb.AppendLine(user.ToString());

sb.AppendLine("---------------------------------------------------------------------------------");

sb.AppendLine();

if (!System.IO.File.Exists(path))

System.IO.File.Create(path).Close();

System.IO.FileStream fileStream = new System.IO.FileStream(path, System.IO.FileMode.Append, System.IO.FileAccess.Write);

System.IO.StreamWriter sw = new System.IO.StreamWriter(fileStream, Encoding.Default);

sw.Write(sb.ToString());

sw.Close();

sw.Dispose();

fileStream.Close();

fileStream.Dispose();

}

}

}

}

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