Question

C# FTP上传文件代码

RT,如何判断FTP上文件是否存在，不存在的话创建，存在的话继续追加内容

Answer 1

FileInfo fileInf = new FileInfo(@"path");
FileStream fs = fileInf.Open(FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
string ftpPath = @"你要上传的FTP路径ftp://ftp.domain.com/doesntexist.txt";
var request = (FtpWebRequest)WebRequest.Create(ftpPath);
request.Credentials = new NetworkCredential("user", "pass");
request.KeepAlive = true;
request.UseBinary = true;
request.Method = WebRequestMethods.Ftp.GetFileSize;
try
{
FtpWebResponse response = (FtpWebResponse)request.GetResponse();
//文件存在，

request.Method = WebRequestMethods.Ftp.AppendFile;
Stream strm = request.GetRequestStream();
int buffLength = 2048;
byte[] buff = new byte[buffLength];
request.ContentLength = fileInf.Length;
int contentLen = fs.Read(buff, 0, buffLength);
while (contentLen != 0)
{
// Write Content from the file stream to the FTP Upload Stream
strm.Write(buff, 0, contentLen);
contentLen = fs.Read(buff, 0, buffLength);
}
strm.Close();
fs.Close();
}
catch (WebException ex)
{
FtpWebResponse response = (FtpWebResponse)ex.Response;
if (response.StatusCode == FtpStatusCode.ActionNotTakenFileUnavailable)
{ //文件不存在
request.Method = WebRequestMethods.Ftp.UploadFile;

Stream strm = request.GetRequestStream();
int buffLength = 2048;
byte[] buff = new byte[buffLength];
request.ContentLength = fileInf.Length;
int contentLen = fs.Read(buff, 0, buffLength);
while (contentLen != 0)
{
// Write Content from the file stream to the FTP Upload Stream
strm.Write(buff, 0, contentLen);
contentLen = fs.Read(buff, 0, buffLength);
}
strm.Close();
fs.Close();

}

}

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FileInfo fileInf = new FileInfo(@"path");
这个里面的path指什么？》

追答

本地路经如c:\a.txt

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