乾貨｜FTP基本操作類大全

知識 10-12

今天中公優就業的老師給大家分享一些乾貨，總結平時用到的一些FTP操作類，方便需要的用到。

1、連接FTP伺服器

/// <summary>
/// 連接FTP伺服器 /// </summary>
/// <param name="FtpServerIP">FTP連接地址</param>
/// <param name="FtpRemotePath">指定FTP連接成功後的當前目錄, 如果不指定即默認為根目錄</param>
/// <param name="FtpUserID">用戶名</param>
/// <param name="FtpPassword">密碼</param>
public FTPHelper(string FtpServerIP, string FtpRemotePath, string FtpUserID, string FtpPassword)
{
ftpServerIP = FtpServerIP;
ftpRemotePath = FtpRemotePath;
ftpUserID = FtpUserID;
ftpPassword = FtpPassword;
ftpURI = "ftp://" + ftpServerIP + "/" + ftpRemotePath + "/";
}

2、上傳

/// <summary>
/// 上傳
/// </summary>
public void Upload(string filename)
{
FileInfo fileInf = new FileInfo(filename);
FtpWebRequest reqFTP;
reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI + fileInf.Name));
reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
reqFTP.Method = WebRequestMethods.Ftp.UploadFile;
reqFTP.KeepAlive = false;
reqFTP.UseBinary = true;
reqFTP.ContentLength = fileInf.Length; int buffLength = 2048; byte[] buff = new byte[buffLength]; int contentLen;
FileStream fs = fileInf.OpenRead(); try
{
Stream strm = reqFTP.GetRequestStream();
contentLen = fs.Read(buff, 0, buffLength); while (contentLen != 0)
{
strm.Write(buff, 0, contentLen);
contentLen = fs.Read(buff, 0, buffLength);
}
strm.Close();
fs.Close();
} catch (Exception ex)
{ throw new Exception(ex.Message);
}
}

3、下載

/// <summary>
/// 下載
/// </summary>
public void Download(string filePath, string fileName)
{ try
{
FileStream outputStream = new FileStream(filePath + "" + fileName, FileMode.Create);
FtpWebRequest reqFTP;
reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI + fileName));
reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;
reqFTP.UseBinary = true;
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();
} catch (Exception ex)
{ throw new Exception(ex.Message);
}
}

4、刪除文件

/// <summary>
/// 刪除文件
/// </summary>
public void Delete(string fileName)
{ try
{
FtpWebRequest reqFTP;
reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI + fileName));
reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
reqFTP.Method = WebRequestMethods.Ftp.DeleteFile;
reqFTP.KeepAlive = false; string result = String.Empty;
FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse(); long size = response.ContentLength;
Stream datastream = response.GetResponseStream();
StreamReader sr = new StreamReader(datastream);
result = sr.ReadToEnd();
sr.Close();
datastream.Close();
response.Close();
} catch (Exception ex)
{ throw new Exception(ex.Message);
}
}

5、獲取當前目錄下明細(包含文件和文件夾)

/// <summary>
/// 獲取當前目錄下明細(包含文件和文件夾)
/// </summary>
public string[] GetFilesDetailList()
{ try
{
StringBuilder result = new StringBuilder();
FtpWebRequest ftp;
ftp = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI));
ftp.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
ftp.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
WebResponse response = ftp.GetResponse();
StreamReader reader = new StreamReader(response.GetResponseStream()); string line = reader.ReadLine();
line = reader.ReadLine();
line = reader.ReadLine(); while (line != null)
{
result.Append(line);
result.Append("
");
line = reader.ReadLine();
}
result.Remove(result.ToString().LastIndexOf("
"), 1);
reader.Close();
response.Close(); return result.ToString().Split("
");
} catch (Exception ex)
{ throw new Exception(ex.Message);
}
}

6、獲取FTP文件列表(包括文件夾)

/// <summary>
/// 獲取FTP文件列表(包括文件夾) /// </summary>
private string[] GetAllList(string url)
{
List<string> list = new List<string>();
FtpWebRequest req = (FtpWebRequest)WebRequest.Create(new Uri(url));
req.Credentials = new NetworkCredential(ftpPassword, ftpPassword);
req.Method = WebRequestMethods.Ftp.ListDirectory;
req.UseBinary = true;
req.UsePassive = true; try
{ using (FtpWebResponse res = (FtpWebResponse)req.GetResponse())
{ using (StreamReader sr = new StreamReader(res.GetResponseStream()))
{ string s; while ((s = sr.ReadLine()) != null)
{
list.Add(s);
}
}
}
} catch (Exception ex)
{ throw (ex);
} return list.ToArray();
}

7、獲取當前目錄下文件列表(不包括文件夾)

/// <summary>
/// 獲取當前目錄下文件列表(不包括文件夾)
/// </summary>
public string[] GetFileList(string url)
{
StringBuilder result = new StringBuilder();
FtpWebRequest reqFTP; try
{
reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(url));
reqFTP.UseBinary = true;
reqFTP.Credentials = new NetworkCredential(ftpPassword, ftpPassword);
reqFTP.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
WebResponse response = reqFTP.GetResponse();
StreamReader reader = new StreamReader(response.GetResponseStream()); string line = reader.ReadLine(); while (line != null)
{ if (line.IndexOf("<DIR>") == -1)
{
result.Append(Regex.Match(line, @"[S]+ [S]+", RegexOptions.IgnoreCase).Value.Split(" ")[1]);
result.Append("
");
}
line = reader.ReadLine();
}
result.Remove(result.ToString().LastIndexOf("
"), 1);
reader.Close();
response.Close();
} catch (Exception ex)
{ throw (ex);
} return result.ToString().Split("
");
}