正则表达式的生成网站：

 Aria2c下载地址：

保存的位置：%appdata%

 

Program.cs

static void Main(string[] args)        {            var url ="https://download.microsoft.com/download/E/4/1/E4173890-A24A-4936-9FC9-AF930FE3FA40/NDP461-KB3102436-x86-x64-AllOS-ENU.exe";            var r=HttpDownLoad.DownloadFileByAria2(url, "c:\\NDP461-KB3102436-x86-x64-AllOS-ENU.exe");            Console.WriteLine(r);            Console.ReadLine();        }

 

using System;using System.Diagnostics;using System.IO;using System.Text.RegularExpressions;namespace ConsoleApplication2{    public class HttpDownLoad    {        /// 
        /// 功能：使用Aria2c进行文件下载        /// 作者：黄海        /// 时间：2018-06-13        /// 
        ///         ///         /// 
             public static bool DownloadFileByAria2(string url, string strFileName)        {            var tool = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData) + "\\aria2-1.34.0-win-64bit-build1\\aria2c.exe";            var fi = new FileInfo(strFileName);            var command = " -c -s 10 -x 10  --file-allocation=none --check-certificate=false -d " + fi.DirectoryName + " -o " + fi.Name + " " + url;            using (var p = new Process())            {                RedirectExcuteProcess(p, tool, command, (s, e) => ShowInfo(url,e.Data));            }            return File.Exists(strFileName) && new FileInfo(strFileName).Length>0;        }        private static void ShowInfo(string url,string a)        {            if (a == null) return;            const string re1 = ".*?"; // Non-greedy match on filler            const string re2 = "(\\(.*\\))"; // Round Braces 1            var r = new Regex(re1 + re2, RegexOptions.IgnoreCase | RegexOptions.Singleline);            var m = r.Match(a);            if (m.Success)            {                var rbraces1 = m.Groups[1].ToString().Replace("(", "").Replace(")", "").Replace("%", "").Replace("s","0");                if (rbraces1 == "OK")                {                    rbraces1 = "100";                }                Console.WriteLine(DateTime.Now.ToString().Replace("/","-")+"    "+url+"    下载进度:"+rbraces1+"%");            }        }        /// 
        /// 功能：重定向执行        /// 
        ///         ///         ///         ///         private static void RedirectExcuteProcess(Process p, string exe, string arg, DataReceivedEventHandler output)        {            p.StartInfo.FileName = exe;            p.StartInfo.Arguments = arg;            p.StartInfo.UseShellExecute = false;    //输出信息重定向            p.StartInfo.CreateNoWindow = true;            p.StartInfo.RedirectStandardError = true;            p.StartInfo.RedirectStandardOutput = true;            p.OutputDataReceived += output;            p.ErrorDataReceived += output;            p.Start();                    //启动线程            p.BeginOutputReadLine();            p.BeginErrorReadLine();            p.WaitForExit();            //等待进程结束        }    }}