利用FileSystemWatcher实现磁盘文件监控

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;

namespace filewatcher
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        string pt;//file path
        FileSystemWatcher watcher = new FileSystemWatcher();
        private void Form1_Load(object sender, EventArgs e)
        {
            Control.CheckForIllegalCrossThreadCalls = false;
            radioButton1.Checked = true;
            ListView lst = new ListView();
        }
        private void textBox1_MouseDoubleClick(object sender, MouseEventArgs e)
        {
            FolderBrowserDialog path = new FolderBrowserDialog();
            path.ShowDialog();
            this.textBox1.Text = path.SelectedPath.ToString();
            this.textBox1.Font = new Font(textBox1.Font, textBox1.Font.Style | FontStyle.Regular);
            this.textBox1.TextAlign =HorizontalAlignment.Left;
            this.textBox1.ForeColor = Color.Black;
            pt = textBox1.Text;           
        }

        private void toolStripButton1_Click(object sender, EventArgs e)
        {
                if (radioButton1.Checked)
                    pt = "C:\\";
                if (radioButton2.Checked)
                    pt = "D:\\";
                if (radioButton3.Checked)
                    pt = "E:\\";
                if (radioButton4.Checked)
                    pt = "F:\\";            
               filewatcher();
               groupBox1.Enabled = false;  
        }

        private void toolStripButton2_Click(object sender, EventArgs e)
        {
            watcher.EnableRaisingEvents = false;
            groupBox1.Enabled = true;
        }
       
        private void filewatcher()
        {
            try
            {
                
                if (flag == 1)
                {
                    watcher.Path = @pt;
                    watcher.IncludeSubdirectories = true;//全局文件监控，包括子目录
                    watcher.EnableRaisingEvents = true;//启用文件监控
                    watcher.Created += new FileSystemEventHandler(OnCreat);
                    watcher.Deleted += new FileSystemEventHandler(OnDelet);
                    watcher.Changed += new FileSystemEventHandler(OnChange);

                }
                else
                {
                    watcher.EnableRaisingEvents = false;
                    return;
                }
            }
            catch(Exception ex)
            {
                return;
            }
            
        }
         private void OnCreat(object sender, FileSystemEventArgs e)
        {
            ListViewItem li = new ListViewItem(DateTime.Now.ToString("HH:mm:ss"));
            li.SubItems.Add(getname(e.Name.ToString()));
            li.SubItems.Add(e.ChangeType.ToString());
            li.SubItems.Add(e.FullPath.ToString());
            lst.Items.Add(li);
        }
        private void OnDelet(object sender, FileSystemEventArgs e)
        {
            ListViewItem li = new ListViewItem(DateTime.Now.ToString("HH:mm:ss"));
            li.SubItems.Add(getname(e.Name.ToString()));
            li.SubItems.Add(e.ChangeType.ToString());
            li.SubItems.Add(e.FullPath.ToString());
            lst.Items.Add(li);
        }
        private void OnChange(object sender, FileSystemEventArgs e)
        {
            ListViewItem li = new ListViewItem(DateTime.Now.ToString("HH:mm:ss"));
            li.SubItems.Add(getname(e.Name.ToString()));
            li.SubItems.Add(e.ChangeType.ToString());
            li.SubItems.Add(e.FullPath.ToString());
            lst.Items.Add(li);
        }
        //处理，获得文件名
        private string getname(string str)
        {
            try
            {
                string[] sttarr = str.Split(new char[] { Convert.ToChar("\\") });
                int length = sttarr.Length;
                string filename = sttarr[length-1];
                return filename;
            }
            catch (Exception cc)
            {
                MessageBox.Show("文件路径不合法","提示");
                return str;
            }
        }
    }
}