C#实现FTP文件上传下载移动
前些天应需求，写了一个自动读取ftp文件的功能，并在读取完成后将文件移动到指定文件夹，下面将代码贴出来。
以下我都是写在一个Ftp帮助类中
private static string FTPCONSTR = "";//FTP的服务器地址
private static string FTPUSERNAME = "";//FTP服务器的用户名
private static string FTPPASSWORD = "";//FTP服务器的密码
private static FtpWebRequest objReqFtp = null; //FTP連接
将需要用到的变量写在这，当然也可以动态获取，看需求。
#region FTP連接
/// <summary>
/// 连接ftp方法
/// </summary>
/// <param name="path"></param>
private static void Connect(String path)
{
// 根据uri创建FtpWebRequest对象
objReqFtp = (FtpWebRequest)FtpWebRequest.Create(new Uri(path));
// 指定数据传输类型
//To transmit text data, change the UseBinary property from its default value ( true) to false.
objReqFtp.UseBinary = true;
// specifies that an SSL connection
objReqFtp.EnableSsl = false;
// ftp用户名和密码
objReqFtp.Credentials = new NetworkCredential(FTPUSERNAME, FTPPASSWORD);
}
#endregion
#region 獲取編碼方式
/// <summary>
/// 获取编码方式
/// </summary>
/// <param name="response"></param>
/// <returns></returns>
private static Encoding GetEncodingEncode(WebResponse response)
{
Encoding encodingTemp = Encoding.Default;
StreamReader reader = new StreamReader(response.GetResponseStream());
encodingTemp = reader.CurrentEncoding;
if (encodingTemp == Encoding.UTF8)
{
encodingTemp = Encoding.UTF8;
}
else if (encodingTemp == Encoding.Default)
{
encodingTemp = Encoding.GetEncoding("GB2312");
}
else
{
encodingTemp = Encoding.UTF8;
}
return encodingTemp;
}
#endregion
#region 获取FTP目录下所有文件名
/// <summary>
/// 读取文件目录下所有的文件名称，包括文件夹名称
/// </summary>
/// <param name="ftpAdd">传过来的文件夹路径</param>
/// <returns>返回的文件或文件夹名称</returns>
public static string[] GetFtpFileList(string FTPURL)
{
string url = FTPCONSTR + FTPURL;
Connect(url);
if (objReqFtp != null)
{
StringBuilder fileListBuilder = new StringBuilder();
//ftpRequest.Method = WebRequestMethods.Ftp.ListDirectoryDetails;//该方法可以得到文件名称的详细资源，包括修改时间、类型等这些属性
objReqFtp.Method = WebRequestMethods.Ftp.ListDirectory;//只得到文件或文件夹的名称
try
{
WebResponse ftpResponse = objReqFtp.GetResponse();
Encoding encod = GetEncodingEncode(ftpResponse);//獲取編碼
StreamReader ftpFileListReader = new StreamReader(ftpResponse.GetResponseStream(), encod);
string line = ftpFileListReader.ReadLine();
while (line != null)
{
fileListBuilder.Append(line);
fileListBuilder.Append("@");//每个文件名称之间用@符号隔开，便于前端调用的时候解析
line = ftpFileListReader.ReadLine();
}
ftpFileListReader.Close();
ftpResponse.Close();
fileListBuilder.Remove(fileListBuilder.ToString().LastIndexOf("@"), 1);
return fileListBuilder.ToString().Split('@');//返回得到的数组
}
catch (Exception ex)
{
Mail.SendmailToMIS($"获取FTP文件列表異常{ex.Message}", "SO3");
return null;
}
}
else
{
return null;
}
}
#endregion
#region 文件自动上传
public static bool UploadFile(string ftpPath, string path, string id)
{
FileInfo f = new FileInfo(path);
path = path.Replace("\\", "/");
bool b = MakeDir(ftpPath);
if (b == false)
{
return false;
}
path = FTPCONSTR + ftpPath + id;
Connect(path);
objReqFtp.KeepAlive = false;
objReqFtp.Method = WebRequestMethods.Ftp.UploadFile;
objReqFtp.ContentLength = f.Length;
int buffLength = 2048;
byte[] buff = new byte[buffLength];
int contentLen;
FileStream fs = f.OpenRead();
try
{
Stream strm = objReqFtp.GetRequestStream();
contentLen = fs.Read(buff, 0, buffLength);
while (contentLen != 0)
{
strm.Write(buff, 0, contentLen);
contentLen = fs.Read(buff, 0, buffLength);
}
strm.Close();
fs.Close();
return true;
}
catch (Exception ex)
{
Mail.SendmailToMIS($"因{ex.Message},无法完成上传", "SO3");
return false;
}
}
#endregion
#region 从ftp服务器下载文件
/// <summary>
/// 从ftp服务器下载文件的功能
/// </summary>
/// <param name="ftpfilepath">ftp下载的地址</param>
/// <param name="filePath">存放到本地的路径</param>
/// <param name="fileName">保存的文件名称</param>
/// <returns></returns>
public static bool Download(string ftpfilepath, string filePath, string fileName)
{
try
{
String onlyFileName = Path.GetFileName(fileName);
string newFileName = filePath + onlyFileName;
if (File.Exists(newFileName))
{
File.Delete(newFileName);//若存在，先刪除
}
ftpfilepath = ftpfilepath.Replace("\\", "/");
string url = FTPCONSTR + ftpfilepath;
Connect(url);
FtpWebResponse response = (FtpWebResponse)objReqFtp.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);
FileStream outputStream = new FileStream(newFileName, FileMode.Create);
while (readCount > 0)
{
outputStream.Write(buffer, 0, readCount);
readCount = ftpStream.Read(buffer, 0, bufferSize);
}
ftpStream.Close();
outputStream.Close();
response.Close();
return true;
}
catch (Exception ex)
{
Mail.SendmailToMIS($"FTP下载异常{ex.Message}", "SO3");
return false;
}
}
#endregion
#region 文件移动
/// <summary>
/// 包括ftp服务器内移动or重命名,目标目录若已有同名文件，原文件会被删除
/// </summary>
/// <param name="currentFilename">当前目录</param>
/// <param name="newFilename">新目录</param>********
public static bool RenameAndMove(string currentFilename, string newFilename)
{
try
{
//currentFilename = currentFilename.Replace("\\", "/"); //*******完整的文件路徑，包括Ftp服务器地址和文件名和后缀******
string uri = FTPCONSTR + currentFilename;
Connect(uri);
objReqFtp.Method = WebRequestMethods.Ftp.Rename;
objReqFtp.RenameTo = newFilename;//********************新的路径，不需要ftp服务器地址
objReqFtp.UseBinary = true;
FtpWebResponse response = (FtpWebResponse)objReqFtp.GetResponse();
Stream ftpStream = response.GetResponseStream();
if (ftpStream != null)
{
ftpStream.Close();
}
bool success = response.StatusCode == FtpStatusCode.CommandOK || response.StatusCode == FtpStatusCode.FileActionOK;
response.Close();
objReqFtp = null;
return success;
}
catch (Exception ex)
{
Mail.SendmailToMIS($"文件移動時產生異常{ex.Message}", "SO3");
return false;
}
}
#endregion
#region 从ftp服务器删除文件的功能
/// <summary>
/// 从ftp服务器删除文件的功能
/// </summary>
/// <param name="fileName"></param>
/// <returns></returns>
public static bool DeleteFile(string fileName)
{
try
{
string url = FTPCONSTR + fileName;
Connect(url);
objReqFtp.Method = WebRequestMethods.Ftp.DeleteFile;
FtpWebResponse response = (FtpWebResponse)objReqFtp.GetResponse();
response.Close();
return true;
}
catch (Exception ex)
{
Mail.SendmailToMIS($"文件刪除時產生異常{ex.Message}", "SO3");
return false;
}
}
#endregion
调用时直接给对应的参数就ok。
