C# FTP操作类可用

淡淡的烟草味﹌ 2021-12-05 01:47 251阅读 0赞

public class FtpClient  
\{  
\#region 构造函数  
/// <summary>  
/// 创建FTP工具  
/// <para>  
/// 默认不使用SSL,使用二进制传输方式,使用被动模式  
/// </para>  
/// </summary>  
/// <param name="host">主机名称</param>  
/// <param name="userId">用户名</param>  
/// <param name="password">密码</param>  
public FtpClient(string host, string userId, string password)  
: this(host, userId, password, 21, null, false, true, true)  
\{  
\}

/// <summary>  
/// 创建FTP工具  
/// </summary>  
/// <param name="host">主机名称</param>  
/// <param name="userId">用户名</param>  
/// <param name="password">密码</param>  
/// <param name="port">端口</param>  
/// <param name="enableSsl">允许Ssl</param>  
/// <param name="proxy">代理</param>  
/// <param name="useBinary">允许二进制</param>  
/// <param name="usePassive">允许被动模式</param>  
public FtpClient(string host, string userId, string password, int port, IWebProxy proxy, bool enableSsl, bool useBinary, bool usePassive)  
\{  
this.userId = userId;  
this.password = password;  
if (host.ToLower().StartsWith("ftp://"))  
\{  
this.host = host;  
\}  
else  
\{  
this.host = "ftp://" + host;  
\}  
this.port = port;  
this.proxy = proxy;  
this.enableSsl = enableSsl;  
this.useBinary = useBinary;  
this.usePassive = usePassive;  
\}  
\#endregion

\#region 主机  
private string host = string.Empty;  
/// <summary>  
/// 主机  
/// </summary>  
public string Host  
\{  
get  
\{  
return this.host ?? string.Empty;  
\}  
\}  
\#endregion

\#region 登录用户名  
private string userId = string.Empty;  
/// <summary>  
/// 登录用户名  
/// </summary>  
public string UserId  
\{  
get  
\{  
return this.userId;  
\}  
\}  
\#endregion

\#region 密码  
private string password = string.Empty;  
/// <summary>  
/// 密码  
/// </summary>  
public string Password  
\{  
get  
\{  
return this.password;  
\}  
\}  
\#endregion

\#region 代理  
IWebProxy proxy = null;  
/// <summary>  
/// 代理  
/// </summary>  
public IWebProxy Proxy  
\{  
get  
\{  
return this.proxy;  
\}  
set  
\{  
this.proxy = value;  
\}  
\}  
\#endregion

\#region 端口  
private int port = 21;  
/// <summary>  
/// 端口  
/// </summary>  
public int Port  
\{  
get  
\{  
return port;  
\}  
set  
\{  
this.port = value;  
\}  
\}  
\#endregion

\#region 设置是否允许Ssl  
private bool enableSsl = false;  
/// <summary>  
/// EnableSsl  
/// </summary>  
public bool EnableSsl  
\{  
get  
\{  
return enableSsl;  
\}  
\}  
\#endregion

\#region 使用被动模式  
private bool usePassive = true;  
/// <summary>  
/// 被动模式  
/// </summary>  
public bool UsePassive  
\{  
get  
\{  
return usePassive;  
\}  
set  
\{  
this.usePassive = value;  
\}  
\}  
\#endregion

\#region 二进制方式  
private bool useBinary = true;  
/// <summary>  
/// 二进制方式  
/// </summary>  
public bool UseBinary  
\{  
get  
\{  
return useBinary;  
\}  
set  
\{  
this.useBinary = value;  
\}  
\}  
\#endregion

\#region 远端路径  
private string remotePath = "/";  
/// <summary>  
/// 远端路径  
/// <para>  
/// 返回FTP服务器上的当前路径(可以是 / 或 /a/../ 的形式)  
/// </para>  
/// </summary>  
public string RemotePath  
\{  
get  
\{  
return remotePath;  
\}  
set  
\{  
string result = "/";  
if (!string.IsNullOrEmpty(value) && value != "/")  
\{  
result = "/" + value.TrimStart('/').TrimEnd('/') + "/";  
\}  
this.remotePath = result;  
\}  
\}  
\#endregion

\#region 创建一个FTP连接  
/// <summary>  
/// 创建一个FTP请求  
/// </summary>  
/// <param name="url">请求地址</param>  
/// <param name="method">请求方法</param>  
/// <returns>FTP请求</returns>  
private FtpWebRequest CreateRequest(string url, string method)  
\{  
//建立连接  
FtpWebRequest request = (FtpWebRequest)WebRequest.Create(url);  
request.Credentials = new NetworkCredential(this.userId, this.password);  
request.Proxy = this.proxy;  
request.KeepAlive = false;//命令执行完毕之后关闭连接  
request.UseBinary = useBinary;  
request.UsePassive = usePassive;  
request.EnableSsl = enableSsl;  
request.Method = method;  
return request;  
\}  
\#endregion

\#region 上传一个文件到远端路径下  
/// <summary>  
/// 把文件上传到FTP服务器的RemotePath下  
/// </summary>  
/// <param name="localFile">本地文件信息</param>  
/// <param name="remoteFileName">要保存到FTP文件服务器上的名称</param>  
public bool Upload(FileInfo localFile, string remoteFileName)  
\{  
bool result = false;  
if (localFile.Exists)  
\{  
string url = Host.TrimEnd('/') + RemotePath + remoteFileName;  
FtpWebRequest request = CreateRequest(url, WebRequestMethods.Ftp.UploadFile);

//上传数据  
using (Stream rs = request.GetRequestStream())  
using (FileStream fs = localFile.OpenRead())  
\{  
byte\[\] buffer = new byte\[4096\];//4K  
int count = fs.Read(buffer, 0, buffer.Length);  
while (count > 0)  
\{  
rs.Write(buffer, 0, count);  
count = fs.Read(buffer, 0, buffer.Length);  
\}  
fs.Close();  
result = true;  
\}  
return result;  
\}  
throw new Exception(string.Format("本地文件不存在,文件路径:\{0\}", localFile.FullName));  
\}  
\#endregion

\#region 从FTP服务器上下载文件  
/// <summary>  
/// 从当前目录下下载文件  
/// <para>  
/// 如果本地文件存在,则从本地文件结束的位置开始下载.  
/// </para>  
/// </summary>  
/// <param name="serverName">服务器上的文件名称</param>  
/// <param name="localName">本地文件名称</param>  
/// <returns>返回一个值,指示是否下载成功</returns>  
public bool Download(string serverName, string localName)  
\{  
bool result = false;  
using (FileStream fs = new FileStream(localName, FileMode.OpenOrCreate)) //创建或打开本地文件  
\{  
//建立连接  
string url = Host.TrimEnd('/') + RemotePath + serverName;  
FtpWebRequest request = CreateRequest(url, WebRequestMethods.Ftp.DownloadFile);  
request.ContentOffset = fs.Length;  
using (FtpWebResponse response = (FtpWebResponse)request.GetResponse())  
\{  
fs.Position = fs.Length;  
byte\[\] buffer = new byte\[4096\];//4K  
int count = response.GetResponseStream().Read(buffer, 0, buffer.Length);  
while (count > 0)  
\{  
fs.Write(buffer, 0, count);  
count = response.GetResponseStream().Read(buffer, 0, buffer.Length);  
\}  
response.GetResponseStream().Close();  
\}  
result = true;  
\}  
return result;  
\}  
\#endregion

\#region 重命名FTP服务器上的文件  
/// <summary>  
/// 文件更名  
/// </summary>  
/// <param name="oldFileName">原文件名</param>  
/// <param name="newFileName">新文件名</param>  
/// <returns>返回一个值,指示更名是否成功</returns>  
public bool Rename(string oldFileName, string newFileName)  
\{  
bool result = false;  
//建立连接  
string url = Host.TrimEnd('/') + RemotePath + oldFileName;  
FtpWebRequest request = CreateRequest(url, WebRequestMethods.Ftp.Rename);  
request.RenameTo = newFileName;  
using (FtpWebResponse response = (FtpWebResponse)request.GetResponse())  
\{  
result = true;  
\}  
return result;  
\}  
\#endregion

\#region 从当前目录下获取文件列表  
/// <summary>  
/// 获取当前目录下文件列表  
/// </summary>  
/// <returns></returns>  
public List<string> GetFileList()  
\{  
List<string> result = new List<string>();  
//建立连接  
string url = Host.TrimEnd('/') + RemotePath;  
FtpWebRequest request = CreateRequest(url, WebRequestMethods.Ftp.ListDirectory);  
using (FtpWebResponse response = (FtpWebResponse)request.GetResponse())  
\{  
StreamReader reader = new StreamReader(response.GetResponseStream(), System.Text.Encoding.Default);//中文文件名  
string line = reader.ReadLine();  
while (line != null)  
\{  
result.Add(line);  
line = reader.ReadLine();  
\}  
\}  
return result;  
\}  
\#endregion

\#region 从FTP服务器上获取文件和文件夹列表  
/// <summary>  
/// 获取详细列表 从FTP服务器上获取文件和文件夹列表  
/// </summary>  
/// <returns></returns>  
public List<string> GetFileDetails()  
\{  
List<string> result = new List<string>();  
//建立连接  
string url = Host.TrimEnd('/') + RemotePath;  
FtpWebRequest request = CreateRequest(url, WebRequestMethods.Ftp.ListDirectoryDetails);  
using (FtpWebResponse response = (FtpWebResponse)request.GetResponse())  
\{  
StreamReader reader = new StreamReader(response.GetResponseStream(), System.Text.Encoding.Default);//中文文件名  
string line = reader.ReadLine();  
while (line != null)  
\{  
result.Add(line);  
line = reader.ReadLine();  
\}  
\}  
return result;  
\}  
\#endregion

\#region 从FTP服务器上删除文件  
/// <summary>  
/// 删除FTP服务器上的文件  
/// </summary>  
/// <param name="fileName">文件名称</param>  
/// <returns>返回一个值,指示是否删除成功</returns>  
public bool DeleteFile(string fileName)  
\{  
bool result = false;  
//建立连接  
string url = Host.TrimEnd('/') + RemotePath + fileName;  
FtpWebRequest request = CreateRequest(url, WebRequestMethods.Ftp.DeleteFile);  
using (FtpWebResponse response = (FtpWebResponse)request.GetResponse())  
\{  
result = true;  
\}

return result;  
\}  
\#endregion

\#region 在FTP服务器上创建目录  
/// <summary>  
/// 在当前目录下创建文件夹  
/// </summary>  
/// <param name="dirName">文件夹名称</param>  
/// <returns>返回一个值,指示是否创建成功</returns>  
public bool MakeDirectory(string dirName)  
\{  
bool result = false;  
//建立连接  
string url = Host.TrimEnd('/') + RemotePath + dirName;  
FtpWebRequest request = CreateRequest(url, WebRequestMethods.Ftp.MakeDirectory);  
using (FtpWebResponse response = (FtpWebResponse)request.GetResponse())  
\{  
result = true;  
\}  
return result;  
\}  
\#endregion

\#region 从FTP服务器上删除目录  
/// <summary>  
/// 删除文件夹  
/// </summary>  
/// <param name="dirName">文件夹名称</param>  
/// <returns>返回一个值,指示是否删除成功</returns>  
public bool DeleteDirectory(string dirName)  
\{  
bool result = false;  
//建立连接  
string url = Host.TrimEnd('/') + RemotePath + dirName;  
FtpWebRequest request = CreateRequest(url, WebRequestMethods.Ftp.RemoveDirectory);  
using (FtpWebResponse response = (FtpWebResponse)request.GetResponse())  
\{  
result = true;  
\}  
return result;  
\}  
\#endregion

\#region 从FTP服务器上获取文件大小  
/// <summary>  
/// 获取文件大小  
/// </summary>  
/// <param name="fileName"></param>  
/// <returns></returns>  
public long GetFileSize(string fileName)  
\{  
long result = 0;  
//建立连接  
string url = Host.TrimEnd('/') + RemotePath + fileName;  
FtpWebRequest request = CreateRequest(url, WebRequestMethods.Ftp.GetFileSize);  
using (FtpWebResponse response = (FtpWebResponse)request.GetResponse())  
\{  
result = response.ContentLength;  
\}

return result;  
\}  
\#endregion

\#region 给FTP服务器上的文件追加内容  
/// <summary>  
/// 给FTP服务器上的文件追加内容  
/// </summary>  
/// <param name="localFile">本地文件</param>  
/// <param name="remoteFileName">FTP服务器上的文件</param>  
/// <returns>返回一个值,指示是否追加成功</returns>  
public bool Append(FileInfo localFile, string remoteFileName)  
\{  
if (localFile.Exists)  
\{  
using (FileStream fs = new FileStream(localFile.FullName, FileMode.Open))  
\{  
return Append(fs, remoteFileName);  
\}  
\}  
throw new Exception(string.Format("本地文件不存在,文件路径:\{0\}", localFile.FullName));  
\}

/// <summary>  
/// 给FTP服务器上的文件追加内容  
/// </summary>  
/// <param name="stream">数据流(可通过设置偏移来实现从特定位置开始上传)</param>  
/// <param name="remoteFileName">FTP服务器上的文件</param>  
/// <returns>返回一个值,指示是否追加成功</returns>  
public bool Append(Stream stream, string remoteFileName)  
\{  
bool result = false;  
if (stream != null && stream.CanRead)  
\{  
//建立连接  
string url = Host.TrimEnd('/') + RemotePath + remoteFileName;  
FtpWebRequest request = CreateRequest(url, WebRequestMethods.Ftp.AppendFile);  
using (Stream rs = request.GetRequestStream())  
\{  
//上传数据  
byte\[\] buffer = new byte\[4096\];//4K  
int count = stream.Read(buffer, 0, buffer.Length);  
while (count > 0)  
\{  
rs.Write(buffer, 0, count);  
count = stream.Read(buffer, 0, buffer.Length);  
\}  
result = true;  
\}  
\}  
return result;  
\}  
\#endregion

\#region 获取FTP服务器上的当前路径  
/// <summary>  
/// 获取FTP服务器上的当前路径  
/// </summary>  
public string CurrentDirectory  
\{  
get  
\{  
string result = string.Empty;  
string url = Host.TrimEnd('/') + RemotePath;  
FtpWebRequest request = CreateRequest(url, WebRequestMethods.Ftp.PrintWorkingDirectory);  
using (FtpWebResponse response = (FtpWebResponse)request.GetResponse())  
\{  
string temp = response.StatusDescription;  
int start = temp.IndexOf('"') + 1;  
int end = temp.LastIndexOf('"');  
if (end >= start)  
\{  
result = temp.Substring(start, end - start);  
\}  
\}  
return result;

\}  
\}  
\#endregion

\#region 检查当前路径上是否存在某个文件  
/// <summary>  
/// 检查文件是否存在  
/// </summary>  
/// <param name="fileName">要检查的文件名</param>  
/// <returns>返回一个值,指示要检查的文件是否存在</returns>  
public bool CheckFileExist(string fileName)  
\{  
bool result = false;  
if (fileName != null && fileName.Trim().Length > 0)  
\{  
fileName = fileName.Trim();  
List<string> files = GetFileList();  
if (files != null && files.Count > 0)  
\{  
foreach (string file in files)  
\{  
if (file.ToLower() == fileName.ToLower())  
\{  
result = true;  
break;  
\}  
\}  
\}  
\}  
return result;  
\}  
\#endregion

转载于:https://www.cnblogs.com/wangchuang/p/4749112.html