Posted on 2009-07-09 09:47
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C#积累
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using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Data;
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using System.Drawing;
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using System.Text;
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using System.Windows.Forms;
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using System.IO;
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namespace FileWatch
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![](http://www.cppblog.com/Images/OutliningIndicators/ContractedBlock.gif)
{
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public partial class Form1 : Form
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{
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//FileSystemWatcher object
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private FileSystemWatcher filewatcher;
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//声明委托
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private delegate void UpdateWatchTextDelegate( string newText );
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public Form1()
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{
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InitializeComponent();
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this.filewatcher = new FileSystemWatcher();
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//添加事件订阅
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this.filewatcher.Deleted += new FileSystemEventHandler(filewatcher_Deleted);
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this.filewatcher.Renamed += new RenamedEventHandler(filewatcher_Renamed);
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this.filewatcher.Changed += new FileSystemEventHandler(filewatcher_Changed);
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this.filewatcher.Created += new FileSystemEventHandler(filewatcher_Created);
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//检测文件目录是否存在
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DirectoryInfo dirInfo = new DirectoryInfo( @"C:\FileLogs" ) ;
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if( !dirInfo.Exists )
{ dirInfo.Create() ; }
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}
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//异步更新labelWatch中的文本
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public void UpdateWatchText( string newText )
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{
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labelWatch.Text = newText;
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}
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//定义事件处理器
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public void filewatcher_Changed( object source, FileSystemEventArgs e )
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{
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try
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{
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StreamWriter streamwriter = new StreamWriter( @"C:\FileLogs\Log.txt", true ) ;
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streamwriter.WriteLine( "File: {0} {1}", e.FullPath, e.ChangeType.ToString() ) ;
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streamwriter.Close() ;
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this.BeginInvoke( new UpdateWatchTextDelegate(UpdateWatchText), "Wrote change event to log" ) ;
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}
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catch (IOException ex)
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{
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this.BeginInvoke( new UpdateWatchTextDelegate(UpdateWatchText), "Error writing to log" ) ;
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}
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}
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public void filewatcher_Renamed( object source, RenamedEventArgs e )
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{
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try
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{
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StreamWriter streamwrite = new StreamWriter( @"C:\FileLogs\Log.txt", true ) ;
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streamwrite.WriteLine( "File renamed from {0} to {1}", e.OldName, e.FullPath ) ;
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streamwrite.Close() ;
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this.BeginInvoke( new UpdateWatchTextDelegate( UpdateWatchText ), "wrote renamed event to log" ) ;
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}
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catch (IOException ex)
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{
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this.BeginInvoke( new UpdateWatchTextDelegate(UpdateWatchText), "Error writing to log" ) ;
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}
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}
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public void filewatcher_Deleted( object source, FileSystemEventArgs e )
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{
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try
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{
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//打开写文件
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StreamWriter streamwriter = new StreamWriter( @"C:\FileLogs\Log.txt", true ) ;
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streamwriter.WriteLine( "File : {0} deleted", e.FullPath ) ;
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streamwriter.Close() ;
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this.BeginInvoke( new UpdateWatchTextDelegate(UpdateWatchText), "wrote delete event to log" ) ;
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}
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catch (IOException ex)
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{
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this.BeginInvoke( new UpdateWatchTextDelegate(UpdateWatchText), "Error writing to log" ) ;
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}
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}
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public void filewatcher_Created( object source, FileSystemEventArgs e )
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{
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try
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{
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StreamWriter streamwriter = new StreamWriter( @"C:\FileLogs\Log.txt", true ) ;
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streamwriter.WriteLine( "File : {0} was created", e.FullPath ) ;
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streamwriter.Close() ;
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this.BeginInvoke( new UpdateWatchTextDelegate( UpdateWatchText), "wrote create to log" ) ;
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}
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catch (IOException ex)
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{
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this.BeginInvoke( new UpdateWatchTextDelegate(UpdateWatchText), "Erroe writing to log" ) ;
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}
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}
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private void Form1_Load( object sender, EventArgs e )
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{
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}
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private void buttonBrowse_Click(object sender, EventArgs e)
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{
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if( openFileDialog1.ShowDialog() != DialogResult.Cancel )
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{
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//显示打开的文件名字
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this.textBoxLocation.Text = openFileDialog1.FileName ;
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//可以启动watch按钮
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buttonWatch.Enabled = true ;
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}
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}
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private void buttonWatch_Click(object sender, EventArgs e)
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{
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//获取监视的路径
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filewatcher.Path = Path.GetDirectoryName( textBoxLocation.Text ) ;
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//filewatcher.Filter = Path.GetFileName( textBoxLocation.Text ) ;
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filewatcher.Filter = "*.txt";
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filewatcher.NotifyFilter = NotifyFilters.LastWrite | NotifyFilters.FileName | NotifyFilters.Size | NotifyFilters.CreationTime | NotifyFilters.LastAccess ;
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labelWatch.Text = "watching " + textBoxLocation.Text ;
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//begin watching
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filewatcher.EnableRaisingEvents = true ;
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}
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}
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}