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();
   }
  }
 }
}

希望本文所述对大家的c#程序设计有所帮助。