简单的下载软件

本软件利用WebClient.DownloadFileAsync实现下载网络数据。很简单的一个程序。

 

源程序：

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.Net;using System.Net.Sockets;using System.IO;namespace FlyDown{ public partial class Form1 : Form { Timer timer = new Timer(); long timecount = 0; public Form1() { InitializeComponent(); timer.Enabled = false; timer.Interval = 1000; } private void Form1_Load(object sender, EventArgs e) { } private void button1_Click(object sender, EventArgs e) { timer.Enabled = true; timer .Tick +=new EventHandler(timer_Tick); TimeSpan ts1 = new TimeSpan(DateTime.Now.Ticks); using (WebClient wc = new WebClient()) { if (textBox1.Text.Trim() == "") MessageBox.Show("请输入下载路径"); else if (textBox2.Text.Trim() == "") MessageBox.Show("请输入文件存储名"); else { try { wc.Proxy = null; Uri address = new Uri(textBox1.Text.ToString()); //调用DownloadFile方法下载文件 // wc.DownloadFile(textBox1.Text.ToString(), textBox2.Text.ToString()); //调用DownloadFileAsync异步下载文件 wc.DownloadFileAsync(address, textBox2.Text.ToString()); wc.DownloadProgressChanged += new DownloadProgressChangedEventHandler(wc_DownloadProgressChanged); //下载完成的响应事件 wc.DownloadFileCompleted += new AsyncCompletedEventHandler(wc_DownloadFileCompleted); //if(File .Exists (textBox2 .Text .ToString ())) // { // TimeSpan ts2 = new TimeSpan(DateTime.Now.Ticks); // TimeSpan ts=ts2.Subtract (ts1 ).Duration(); // MessageBox.Show("文件下载完成.下载用时：" + ts.Hours.ToString() + "小时" + // ts.Minutes.ToString() + "分钟" + ts.Seconds.ToString() + "秒"); // } } catch (Exception ex) { MessageBox.Show(ex.Message); } } } } private void timer_Tick(object o, EventArgs e) { timecount++; } //提示下载完成，并显示下载用时 private void wc_DownloadFileCompleted(object sender, AsyncCompletedEventArgs e) { MessageBox.Show("下载完成，下载用时："+timecount+"秒" ); } //定义进度条响应事件 private void wc_DownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e) { progressBar1.Value = e.ProgressPercentage; } private void button2_Click(object sender, EventArgs e) { System.Diagnostics.Process.Start(textBox2.Text.ToString()); } private void button3_Click(object sender, EventArgs e) { //MessageBox.Show(Application.ExecutablePath+"+"+Directory .GetCurrentDirectory ()+"+"+Application .StartupPath); System.Diagnostics.Process.Start(Application.StartupPath); } }}