ftp上传、下载、删除、创建新文件夹等操作的整理

淡淡的烟草味﹌ 2022-12-27 04:51 279阅读 0赞

1，上传。供新手参考

//文件上传地址根目录，这里通过IIS架设本地主机为FTP服务器  
string FileSaveUri = @"ftp://服务器id/要上传的文件夹/";//服务器名以及要上传的文件夹名。  
//FTP用户名密码  
string ftpUser = "登录名";  
string ftpPassWord = “密码";  
  
Stream requestStream = null;  
Stream fileStream = null;  
FtpWebResponse uploadResponse = null;//创建FtpWebResponse实例uploadResponse  
//Btn\_Upload.  
if (fupPhoto.HasFile)  
\{  
//获取文件长度  
int FileLength = fupPhoto.PostedFile.ContentLength;  
//限制上传文件最大不能超过500M  
if (FileLength < 512 \* 1024 \* 1024)  
\{  
try  
\{  
//格式化为URI  
Uri uri = new Uri(FileSaveUri + Path.GetFileName(fupPhoto.PostedFile.FileName));  
FtpWebRequest uploadRequest = (FtpWebRequest)WebRequest.Create(uri);//创建FtpWebRequest实例uploadRequest  
  
//设置请求的方法是FTP文件下载  
  
uploadRequest.KeepAlive = false;//这些小地方很重要。没有设置好可能会上传不成功  
uploadRequest.UsePassive = false;  
uploadRequest.Method = WebRequestMethods.Ftp.UploadFile;//将FtpWebRequest属性设置为上传文件  
uploadRequest.Credentials = new NetworkCredential(ftpUser, ftpPassWord);//认证FTP用户名密码  
requestStream = uploadRequest.GetRequestStream();//获得用于上传FTP的流  
byte\[\] buffer = new byte\[FileLength\];  
fileStream = fupPhoto.PostedFile.InputStream;//截取FileUpload获取的文件流，作为上传FTP的流  
fileStream.Read(buffer, 0, FileLength);  
requestStream.Write(buffer, 0, FileLength);//将buffer写入流  
requestStream.Close();  
uploadResponse = (FtpWebResponse)uploadRequest.GetResponse();//返回FTP服务器响应，上传完成  
//上传成功  
\}  
catch (Exception ex)  
\{  
//无法上传  
\}  
finally  
\{  
if (uploadResponse != null)  
uploadResponse.Close();  
if (fileStream != null)  
fileStream.Close();  
if (requestStream != null)  
requestStream.Close();  
\}  
\}//end if \#FileLength\#  
else  
\{  
//上传文件过大  
\}  
\}//end if \#FileUpload.HasFile\#  
else  
\{  
//未选择文件  
\}  
2，下载  
string filelrc = Page.MapPath("要保存的路径。我测试时是保存在根目录下某个文件夹下的");  
string urllrc = @"ftp://服务器ip/要下载的文件所在的位置";  
DownLoad(filelrc, urllrc);

private void DownLoad(string FileName, string url)  
\{  
// string TempFolderPath =@"C:\\song\\";//本地保存目录  
string FtpUserName = "用户名";  
string FtpPassWord = "密码";  
//创建一个文件流  
FileStream fs = null;  
Stream responseStream = null;  
  
try  
\{  
//创建一个与FTP服务器联系的FtpWebRequest对象  
FtpWebRequest request = (FtpWebRequest)WebRequest.Create(new Uri(url));  
//设置请求的方法是FTP文件下载  
request.Method = WebRequestMethods.Ftp.DownloadFile;  
request.KeepAlive = false;  
request.UsePassive = false;  
//连接登录FTP服务器  
request.Credentials = new NetworkCredential(FtpUserName, FtpPassWord);  
//获取一个请求响应对象  
  
FtpWebResponse response = (FtpWebResponse)request.GetResponse();  
// WebExceptionStatus.ConnectFailure;  
//获取请求的响应流  
responseStream = response.GetResponseStream();  
//判断本地文件是否存在，如果存在，则打开和重写本地文件  
  
if (File.Exists(FileName))  
\{  
// fs = File.Open(FileName, FileMode.Open, FileAccess.ReadWrite);  
return;  
\}  
//判断本地文件是否存在，如果不存在，则创建本地文件  
else  
\{  
fs = File.Create(FileName);  
\}  
if (fs != null)  
\{  
int buffer\_count = 65536;  
byte\[\] buffer = new byte\[buffer\_count\];  
int size = 0;  
while ((size = responseStream.Read(buffer, 0, buffer\_count)) > 0)  
\{  
fs.Write(buffer, 0, size);  
\}  
fs.Flush();  
fs.Close();  
responseStream.Close();  
\}  
\}  
finally  
\{  
//Response.Write(response.StatusDescription);  
if (fs != null)  
fs.Close();  
if (responseStream != null)  
responseStream.Close();  
\}  
\}

3，创建目录

public void MakeDir(string dirName)  
\{  
string ftpServerIP = @"服务器ip";  
  
string ftpUserID = @"用户名";  
  
string ftpPassword = @"密码";  
try  
\{  
string uri = "ftp://" + ftpServerIP + "/Photo/" + dirName;  
  
// 根据uri创建FtpWebRequest对象  
reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));  
// 指定数据传输类型  
reqFTP.UseBinary = true;  
  
// ftp用户名和密码  
  
reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);  
  
reqFTP.Method = WebRequestMethods.Ftp.MakeDirectory;  
  
FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();  
  
response.Close();  
  
\}  
  
catch (Exception ex)  
\{  
  
  
\}  
  
\}

4，删除

public void DeleteFileName()  
\{  
string uri = "ftp://服务器ip地址/文件路径";  
try  
\{  
//用户名密码  
string FtpUserName = "用户名";  
string FtpPassWord = "密码";  
//创建一个与FTP服务器联系的FtpWebRequest对象  
FtpWebRequest request = (FtpWebRequest)WebRequest.Create(new Uri(url));  
//设置请求的方法是FTP文件删除  
request.Method = WebRequestMethods.Ftp.DeleteFile;  
request.KeepAlive = false;  
request.UsePassive = false;  
//连接登录FTP服务器  
request.Credentials = new NetworkCredential(FtpUserName, FtpPassWord);  
//获取一个请求响应对象  
FtpWebResponse response = (FtpWebResponse)request.GetResponse();  
response.Close();  
\}  
  
catch (Exception ex)  
\{  
Response.Write("<script>alert("+ex.Message+")</script>");  
\}  
  
\}