بفرما
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.Threading;
using System.IO;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
string[] s = Directory.GetFiles("k:\\mp3","*.*",SearchOption.Al lDirectories);
this.BeginInvoke((MethodInvoker)delegate { progressBar1.Maximum = s.Length; });
int a=0;
foreach (string item in s)
{
backgroundWorker1.ReportProgress(a++, item);
this.BeginInvoke((MethodInvoker)delegate { label1.Text = a.ToString(); });
Thread.Sleep(50);
}
}
private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
progressBar1.Value = e.ProgressPercentage;
this.Text = e.UserState.ToString();
listBox1.Items.Add(e.UserState);
}
private void Form1_Load(object sender, EventArgs e)
{
backgroundWorker1.RunWorkerAsync();
}
private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
progressBar1.Value = progressBar1.Maximum;
}
}
}