ftp获取远程Pdf文件

此程序需要安装ftp服务器，安装adobe reader（我这里使用的adobe reader9.0）

1、部署ftp服务器

将ftp的权限设置为允许匿名访问，部署完成

2.安装adobe reader9.0阅读器

3、设置visual studio 加载adobe reader的插件

工具箱-选择项-com组件

选择adobe PDF Reader 确定完成

到此可以在winform中使用阅读器了

文档加载如下代码可完成文档的加载显示：还是相当简单的。

axAcroPDF1.src =”c:wyDocument.pdf”;

4、开始写代码实现功能

工程结构如下：

主窗体界面：

后端代码如下：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Configuration;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace myPDFDmeo
{
    public partial class getFileForm : Form
    {

        FtpUtility ftp = new FtpUtility();
        List<string> fileNames = new List<string>();
        public getFileForm()
        {
            InitializeComponent();
        }

        //获取远程计算机文件
        private void button1_Click(object sender, EventArgs e)
        {
            //远程服务器地址
            string remoteIpAddress = ConfigurationManager.AppSettings["RemoteIpAddress"].ToString();
            //本地目录
            string localPath = ConfigurationManager.AppSettings["LocalDirectory"].ToString();
           
            ftp.FtpExplorer("anonymous", "chenshengwei@163.com", remoteIpAddress);
           
            //获取ftp当前目录下所有文件列表
            List<FileStruct> filesList = ftp.GetFileList();
          
            //获取本地文件夹的所有文件名
            fileNames = ftp.ProcessDirectory(localPath);
           
            //删除本地文件夹的所有文件
            for (int i = 0; i < fileNames.Count; i++)
            {
                string localFile = localPath + fileNames[i].ToString();
                //删除当前文件
                if (File.Exists(localFile))
                {
                    File.Delete(localFile);
                }
            }
            //下载远程服务器服务器文件
            for (int i = 0; i < filesList.Count; i++)
            {
                ftp.DownloadFtp(localPath, filesList[i].Name, remoteIpAddress, "anonymous", "chenshengwei@163.comm");
            }
            //绑定文件列表到combox
            comboBox1.DataSource = filesList;
            comboBox1.DisplayMember = "Name";
        }

        //浏览
        private void button2_Click(object sender, EventArgs e)
        {
            string current = ((FileStruct)comboBox1.SelectedItem).Name;
            //将文件名称传入
            pdfViewForm p = new pdfViewForm(current);
            p.Show();
        }
    }
}

显示的阅读器窗体：

直接拖上adobe reader组件 即可 设置窗体初始化最大化属性  设置reader组件的dock属性-fill

后端代码如下：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Configuration;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace myPDFDmeo
{
    public partial class pdfViewForm : Form
    {
        private string parthPdfFile { get; set; }
        string localPath = ConfigurationManager.AppSettings["LocalDirectory"].ToString();
        public pdfViewForm(string currentfileName)
        {
            InitializeComponent();
            this.parthPdfFile = currentfileName;
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            axAcroPDF1.src = localPath + parthPdfFile.ToString();


        }

    }
}

下面是ftp访问远程主机获取文件的核心实现类了

using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Text.RegularExpressions;

namespace myPDFDmeo
{
    enum FileListStyle
    {
        UnixStyle,
        WindowsStyle,
        Unknown
    }
    /// <summary>
    /// 文件信息
    /// </summary>
    public class FileStruct
    {
        public string Flags { get; set; }
        public bool IsDirectory { get; set; }
        public string Owner { get; set; }
        public string Group { get; set; }
        public string Size { get; set; }
        public DateTime CreateTime { get; set; }
        public string Name { get; set; }
    }
    /// <summary>
    /// Ftp访问文件目录类
    /// </summary>
    class FtpUtility
    {
        //ftp 用户名
        private string username;
        //ftp密码
        private string password;
        //ftp文件访问地址
        private string uri;
        private FileInfo fileInfo;
        /// <summary>
        /// 初始化Ftp
        /// </summary>
        /// <param name="username"></param>
        /// <param name="password"></param>
        /// <param name="uri"></param>
        public void FtpExplorer(string username, string password, string uri)
        {
            this.username = username;
            this.password = password;
            this.uri = uri;
        }
        /// <summary>
        /// 获取本地目录文件名
        /// </summary>
        /// <param name="localFile"></param>
        /// <returns></returns>
        public List<string> ProcessDirectory(string localFile)
        {
            List<string> fileNames = new List<string>();
            string[] fileEntries = Directory.GetFiles(localFile);
            for (int i = 0; i < fileEntries.Length; i++)
            {
                fileInfo = new FileInfo(fileEntries[i].ToString());
                fileNames.Add(fileInfo.Name);
            }
            return fileNames;
        }


        #region ftp下载浏览文件夹信息
        /// <summary>
        /// 得到当前目录下的所有目录和文件
        /// </summary>
        /// <param name="srcpath">浏览的目录</param>
        /// <returns></returns>
        public List<FileStruct> GetFileList( )
        {
            List<FileStruct> list = new List<FileStruct>();
            FtpWebRequest reqFtp;
            WebResponse response = null;
            string ftpuri = string.Format("ftp://{0}/", uri);
            try
            {
                reqFtp = (FtpWebRequest)FtpWebRequest.Create(ftpuri);
                reqFtp.UseBinary = true;
                reqFtp.Credentials = new NetworkCredential(username, password);
                reqFtp.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
                response = reqFtp.GetResponse();
                list = ListFilesAndDirectories((FtpWebResponse)response).ToList();
                response.Close();
            }
            catch
            {
                if (response != null)
                {
                    response.Close();
                }
            }
            return list;
        }
        #endregion
        #region 列出目录文件信息
        /// <summary>
        /// 列出FTP服务器上面当前目录的所有文件和目录
        /// </summary>
        public FileStruct[] ListFilesAndDirectories(FtpWebResponse Response)
        {
            StreamReader stream = new StreamReader(Response.GetResponseStream(), Encoding.Default);
            string Datastring = stream.ReadToEnd();
            FileStruct[] list = GetList(Datastring);
            return list;
        }

        /// <summary>
        /// 获得文件和目录列表
        /// </summary>
        /// <param name="datastring">FTP返回的列表字符信息</param>
        private FileStruct[] GetList(string datastring)
        {
            List<FileStruct> myListArray = new List<FileStruct>();
            string[] dataRecords = datastring.Split('
');
            FileListStyle _directoryListStyle = GuessFileListStyle(dataRecords);
            foreach (string s in dataRecords)
            {
                if (_directoryListStyle != FileListStyle.Unknown && s != "")
                {
                    FileStruct f = new FileStruct();
                    f.Name = "..";
                    switch (_directoryListStyle)
                    {
                        case FileListStyle.UnixStyle:
                            f = ParseFileStructFromUnixStyleRecord(s);
                            break;
                        case FileListStyle.WindowsStyle:
                            f = ParseFileStructFromWindowsStyleRecord(s);
                            break;
                    }
                    if (!(f.Name == "." || f.Name == ".."))
                    {
                        myListArray.Add(f);
                    }
                }
            }
            return myListArray.ToArray();
        }


        /// <summary>
        /// 从Windows格式中返回文件信息
        /// </summary>
        /// <param name="Record">文件信息</param>
        private FileStruct ParseFileStructFromWindowsStyleRecord(string Record)
        {
            FileStruct f = new FileStruct();
            string processstr = Record.Trim();
            string dateStr = processstr.Substring(0, 8);
            processstr = (processstr.Substring(8, processstr.Length - 8)).Trim();
            string timeStr = processstr.Substring(0, 7);
            processstr = (processstr.Substring(7, processstr.Length - 7)).Trim();
            DateTimeFormatInfo myDTFI = new CultureInfo("en-US", false).DateTimeFormat;
            myDTFI.ShortTimePattern = "t";
            f.CreateTime = DateTime.Parse(dateStr + " " + timeStr, myDTFI);
            if (processstr.Substring(0, 5) == "<DIR>")
            {
                f.IsDirectory = true;
                processstr = (processstr.Substring(5, processstr.Length - 5)).Trim();
            }
            else
            {
                string[] strs = processstr.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);   // true);
                processstr = strs[1];
                f.IsDirectory = false;
            }
            f.Name = processstr;
            return f;
        }

        /// <summary>
        /// 判断文件列表的方式Window方式还是Unix方式
        /// </summary>
        /// <param name="recordList">文件信息列表</param>
        private FileListStyle GuessFileListStyle(string[] recordList)
        {
            foreach (string s in recordList)
            {
                if (s.Length > 10
                 && Regex.IsMatch(s.Substring(0, 10), "(-|d)(-|r)(-|w)(-|x)(-|r)(-|w)(-|x)(-|r)(-|w)(-|x)"))
                {
                    return FileListStyle.UnixStyle;
                }
                else if (s.Length > 8
                 && Regex.IsMatch(s.Substring(0, 8), "[0-9][0-9]-[0-9][0-9]-[0-9][0-9]"))
                {
                    return FileListStyle.WindowsStyle;
                }
            }
            return FileListStyle.Unknown;
        }
        
        /// <summary>
        /// 从Unix格式中返回文件信息
        /// </summary>
        /// <param name="Record">文件信息</param>
        private FileStruct ParseFileStructFromUnixStyleRecord(string Record)
        {
            FileStruct f = new FileStruct();
            string processstr = Record.Trim();
            f.Flags = processstr.Substring(0, 10);
            f.IsDirectory = (f.Flags[0] == 'd');
            processstr = (processstr.Substring(11)).Trim();
            _cutSubstringFromStringWithTrim(ref processstr, ' ', 0);   //跳过一部分
            f.Owner = _cutSubstringFromStringWithTrim(ref processstr, ' ', 0);
            f.Group = _cutSubstringFromStringWithTrim(ref processstr, ' ', 0);
            f.Size = _cutSubstringFromStringWithTrim(ref processstr, ' ', 0);
            string yearOrTime = processstr.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries)[2];
            int m_index = processstr.IndexOf(yearOrTime);
            if (yearOrTime.IndexOf(":") >= 0)  //time
            {
                processstr = processstr.Replace(yearOrTime, DateTime.Now.Year.ToString());
            }
            f.CreateTime = DateTime.Parse(_cutSubstringFromStringWithTrim(ref processstr, ' ', 8) + " " + yearOrTime);
            f.Name = processstr;   //最后就是名称
            return f;
        }

        /// <summary>
        /// 按照一定的规则进行字符串截取
        /// </summary>
        /// <param name="s">截取的字符串</param>
        /// <param name="c">查找的字符</param>
        /// <param name="startIndex">查找的位置</param>
        private string _cutSubstringFromStringWithTrim(ref string s, char c, int startIndex)
        {
            int pos1 = s.IndexOf(c, startIndex);
            string retString = s.Substring(0, pos1);
            s = (s.Substring(pos1)).Trim();
            return retString;
        }
        #endregion

        /// <summary>
        /// Ftp下载文档
        /// </summary>
        public  int DownloadFtp(string filePath, string fileName, string ftpServerIP, string ftpUserID, string ftpPassword)
        {
            FtpWebRequest reqFTP;
            try
            {
                FileStream outputStream = new FileStream(filePath + "\" + fileName, FileMode.Create);
                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP + "/" + fileName));
                reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;
                reqFTP.UseBinary = true;
                reqFTP.KeepAlive = false;
                reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                Stream ftpStream = response.GetResponseStream();
                long cl = response.ContentLength;
                int bufferSize = 2048;
                int readCount;
                byte[] buffer = new byte[bufferSize];
                readCount = ftpStream.Read(buffer, 0, bufferSize);
                while (readCount > 0)
                {
                    outputStream.Write(buffer, 0, readCount);
                    readCount = ftpStream.Read(buffer, 0, bufferSize);
                }
                ftpStream.Close();
                outputStream.Close();
                response.Close();
                return 0;
            }
            catch (Exception ex)
            {
                return -2;

            }

        }

        public string Username
        {
            get { return username; }
            set { username = value; }
        }
        public string Password
        {
            get { return password; }
            set { password = value; }
        }
        public string Uri
        {
            get { return uri; }
            set { uri = value; }
        }

    }
}

说明：下载文件时文件名包含空格的话，会有问题，今天没时间改正了。

下面是配置文件中使用的两个简单的配置了：

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <startup> 
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
    </startup>
  <appSettings>
    <add key="RemoteIpAddress" value="127.0.0.1"/>
    <add key="LocalDirectory"  value="E:down"/>
  </appSettings>
</configuration>

至此，程序基本完成了，细节问题以后再改吧