Csharp/CSharp Tutorial/File Directory Stream/FileSystemWatcher
Содержание
FileSystemWatcher Demo
<source lang="csharp">using System; using System.IO; public class MainClass {
public static void Main(string[] args)
{
FileSystemWatcher watcher = new FileSystemWatcher();
watcher.Path = @"c:\Test";
watcher.NotifyFilter = NotifyFilters.LastAccess |
NotifyFilters.LastWrite |
NotifyFilters.FileName |
NotifyFilters.DirectoryName;
watcher.Filter = "*.txt";
watcher.Changed += new FileSystemEventHandler(OnChanged);
watcher.Created += new FileSystemEventHandler(OnChanged);
watcher.Deleted += new FileSystemEventHandler(OnChanged);
watcher.Renamed += new RenamedEventHandler(OnRenamed);
watcher.EnableRaisingEvents = true;
}
public static void OnChanged(object source, FileSystemEventArgs e)
{
Console.WriteLine("Event Fired");
}
public static void OnRenamed(object source, RenamedEventArgs e)
{
Console.WriteLine("Event Fired");
}
}</source>
File Watch
<source lang="csharp">using System; using System.Collections.Generic; using System.ruponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.IO;
public class Form1 : Form
{
private FileSystemWatcher watcher;
private delegate void UpdateWatchTextDelegate(string newText);
public Form1()
{
InitializeComponent();
this.watcher = new System.IO.FileSystemWatcher();
this.watcher.Deleted += new System.IO.FileSystemEventHandler(this.OnDelete);
this.watcher.Renamed += new System.IO.RenamedEventHandler(this.OnRenamed);
this.watcher.Changed += new System.IO.FileSystemEventHandler(this.OnChanged);
this.watcher.Created += new System.IO.FileSystemEventHandler(this.OnCreate);
DirectoryInfo aDir = new DirectoryInfo("C:\\");
}
public void UpdateWatchText(string newText)
{
lblWatch.Text = newText;
}
public void OnChanged(object source, FileSystemEventArgs e)
{
try
{
StreamWriter sw = new StreamWriter("C:/Log.txt", true);
sw.WriteLine("File: {0} {1}", e.FullPath,e.ChangeType.ToString());
sw.Close();
this.BeginInvoke(new UpdateWatchTextDelegate(UpdateWatchText),"Wrote change event to log");
}
catch (IOException)
{
this.BeginInvoke(new UpdateWatchTextDelegate(UpdateWatchText),"Error Writing to log");
}
}
public void OnRenamed(object source, RenamedEventArgs e)
{
try
{
StreamWriter sw = new StreamWriter("C:/Log.txt", true);
sw.WriteLine("File renamed from {0} to {1}", e.OldName,e.FullPath);
sw.Close();
this.BeginInvoke(new UpdateWatchTextDelegate(UpdateWatchText),"Wrote renamed event to log");
}
catch (IOException)
{
this.BeginInvoke(new UpdateWatchTextDelegate(UpdateWatchText),"Error Writing to log");
}
}
public void OnDelete(object source, FileSystemEventArgs e)
{
try
{
StreamWriter sw = new StreamWriter("C:/Log.txt", true);
sw.WriteLine("File: {0} Deleted", e.FullPath);
sw.Close();
this.BeginInvoke(new UpdateWatchTextDelegate(UpdateWatchText),"Wrote delete event to log");
}
catch (IOException)
{
this.BeginInvoke(new UpdateWatchTextDelegate(UpdateWatchText),"Error Writing to log");
}
}
public void OnCreate(object source, FileSystemEventArgs e)
{
try
{
StreamWriter sw = new StreamWriter("C:/FileLogs/Log.txt", true);
sw.WriteLine("File: {0} Created", e.FullPath);
sw.Close();
this.BeginInvoke(new UpdateWatchTextDelegate(UpdateWatchText),"Wrote create event to log");
}
catch (IOException)
{
this.BeginInvoke(new UpdateWatchTextDelegate(UpdateWatchText),"Error Writing to log");
}
}
private void cmdBrowse_Click(object sender, EventArgs e)
{
if (FileDialog.ShowDialog() != DialogResult.Cancel)
{
txtLocation.Text = FileDialog.FileName;
cmdWatch.Enabled = true;
}
}
private void cmdWatch_Click(object sender, EventArgs e)
{
watcher.Path = Path.GetDirectoryName(txtLocation.Text);
watcher.Filter = Path.GetFileName(txtLocation.Text);
watcher.NotifyFilter = NotifyFilters.LastWrite | NotifyFilters.FileName | NotifyFilters.Size;
lblWatch.Text = "Watching " + txtLocation.Text;
watcher.EnableRaisingEvents = true;
}
private void InitializeComponent()
{
this.txtLocation = new System.Windows.Forms.TextBox();
this.cmdBrowse = new System.Windows.Forms.Button();
this.cmdWatch = new System.Windows.Forms.Button();
this.lblWatch = new System.Windows.Forms.Label();
this.FileDialog = new System.Windows.Forms.OpenFileDialog();
this.SuspendLayout();
//
// txtLocation
//
this.txtLocation.Location = new System.Drawing.Point(8, 26);
this.txtLocation.Name = "txtLocation";
this.txtLocation.Size = new System.Drawing.Size(184, 20);
this.txtLocation.TabIndex = 0;
//
// cmdBrowse
//
this.cmdBrowse.Location = new System.Drawing.Point(208, 24);
this.cmdBrowse.Name = "cmdBrowse";
this.cmdBrowse.Size = new System.Drawing.Size(64, 24);
this.cmdBrowse.TabIndex = 1;
this.cmdBrowse.Text = "Browse...";
this.cmdBrowse.UseVisualStyleBackColor = true;
this.cmdBrowse.Click += new System.EventHandler(this.cmdBrowse_Click);
//
// cmdWatch
//
this.cmdWatch.Enabled = false;
this.cmdWatch.Location = new System.Drawing.Point(88, 56);
this.cmdWatch.Name = "cmdWatch";
this.cmdWatch.Size = new System.Drawing.Size(80, 32);
this.cmdWatch.TabIndex = 2;
this.cmdWatch.Text = "Watch!";
this.cmdWatch.UseVisualStyleBackColor = true;
this.cmdWatch.Click += new System.EventHandler(this.cmdWatch_Click);
//
// lblWatch
//
this.lblWatch.AutoSize = true;
this.lblWatch.Location = new System.Drawing.Point(8, 104);
this.lblWatch.Name = "lblWatch";
this.lblWatch.Size = new System.Drawing.Size(0, 13);
this.lblWatch.TabIndex = 3;
//
// FileDialog
//
this.FileDialog.FileName = "openFileDialog1";
this.FileDialog.Filter = "All Files|*.*";
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(296, 135);
this.Controls.Add(this.lblWatch);
this.Controls.Add(this.cmdWatch);
this.Controls.Add(this.cmdBrowse);
this.Controls.Add(this.txtLocation);
this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog;
this.MaximizeBox = false;
this.MinimizeBox = false;
this.Name = "Form1";
this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
this.Text = "File Monitor";
this.ResumeLayout(false);
this.PerformLayout();
}
private System.Windows.Forms.TextBox txtLocation;
private System.Windows.Forms.Button cmdBrowse;
private System.Windows.Forms.Button cmdWatch;
private System.Windows.Forms.Label lblWatch;
private System.Windows.Forms.OpenFileDialog FileDialog;
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Form1());
}
}</source>
My Directory Watcher
<source lang="csharp">using System; using System.Collections.Generic; using System.Text; using System.IO;
class Program
{
static void Main(string[] args)
{
FileSystemWatcher watcher = new FileSystemWatcher();
watcher.Path = "C:\\";
watcher.NotifyFilter = NotifyFilters.LastAccess
| NotifyFilters.LastWrite
| NotifyFilters.FileName
| NotifyFilters.DirectoryName;
watcher.Filter = "*.txt";
watcher.Changed += new FileSystemEventHandler(OnChanged);
watcher.Created += new FileSystemEventHandler(OnChanged);
watcher.Deleted += new FileSystemEventHandler(OnChanged);
watcher.Renamed += new RenamedEventHandler(OnRenamed);
watcher.EnableRaisingEvents = true;
Console.Read();
}
static void OnChanged(object source, FileSystemEventArgs e)
{
Console.WriteLine("File: {0} {1}!", e.FullPath, e.ChangeType);
}
static void OnRenamed(object source, RenamedEventArgs e)
{
Console.WriteLine("File: {0} renamed to\n{1}", e.OldFullPath, e.FullPath);
}
}</source>
Use FileSystemWatcher to detect file changes
<source lang="csharp">using System; using System.IO; using System.Windows.Forms; static class MainClass {
static void Main()
{
using (FileSystemWatcher watch = new FileSystemWatcher())
{
watch.Path = Application.StartupPath;
watch.Filter = "*.*";
watch.IncludeSubdirectories = true;
watch.Created += new FileSystemEventHandler(OnCreatedOrDeleted);
watch.Deleted += new FileSystemEventHandler(OnCreatedOrDeleted);
watch.EnableRaisingEvents = true;
if (File.Exists("test.bin"))
{
File.Delete("test.bin");
}
using (FileStream fs = new FileStream("test.bin", FileMode.Create))
{
}
}
}
private static void OnCreatedOrDeleted(object sender, FileSystemEventArgs e)
{
Console.WriteLine("\tNOTIFICATION: " + e.FullPath + "" was " + e.ChangeType.ToString());
}
}</source>
NOTIFICATION: C:\Java_Dev\WEB\dev\CSharp\test.bin" was Deleted
Watching for filesystem updates synchronous
<source lang="csharp">using System; using System.Collections.Generic; using System.Collections.Specialized; using System.IO; using System.IO.rupression; using System.Net; using System.Net.Mail; using System.Net.Sockets; using System.Runtime.InteropServices; using System.Text; public class MainClass {
public static void Main()
{
FileSystemWatcher watcher = new FileSystemWatcher(@"c:\", "*.*");
// only rename event
WaitForChangedResult result =watcher.WaitForChanged(WatcherChangeTypes.Changed | WatcherChangeTypes.Renamed);
switch (result.ChangeType)
{
case WatcherChangeTypes.Changed:
Console.WriteLine("{0}: File "{1}" was changed",DateTime.Now, result.Name);
break;
case WatcherChangeTypes.Renamed:
Console.WriteLine("{0}: File "{1}" was renamed to "{2}"",DateTime.Now, result.OldName, result.Name);
break;
}
}
}</source>
