/// <summary>
/// 下载文件
/// </summary>
/// <param name="ftpfilepath">相对根目录的文件完整路径</param>
/// <param name="filePath">本地保存文件的完整路径</param>
/// <param name="fileName">文件名</param>
/// <returns></returns>
public bool Download(string ftpfilepath, string filePath, string fileName, out string errorinfo)////上面的代码实现了从ftp服务器下载文件的功能
{
Exception ex = null;
errorinfo = "";
FrmProcessBar ProcBar = new FrmProcessBar();
ProcBar.Show();
try
{
filePath = filePath.Replace("我的电脑\\", "");
String onlyFileName = Path.GetFileName(fileName);
string newFileName = filePath;
if (File.Exists(newFileName))
{
errorinfo = string.Format("本地文件{0}已存在,无法下载", newFileName);
return(false);
}
ftpfilepath = ftpfilepath.Replace("\\", "/");
string url = "ftp://" + ftpServerIP + "/" + ftpfilepath;
Connect(url);//连接
reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
reqFTP.KeepAlive = false;
reqFTP.Timeout = 10000;
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);
FileStream outputStream = new FileStream(newFileName, FileMode.Create);
long ProcBarValue = 0;
//////
long all = GetFileSize(ftpfilepath, out ex);
{
if (null != ex)
{
return(false);
}
}
ProcBar.SetFrmProcessBarMax(all / 2048);
//////
while (readCount > 0)
{
ProcBarValue++;
ProcBar.SetFrmProcessBarText("正在下载文件：" + fileName);
ProcBar.SetFrmProcessBarValue(ProcBarValue);
Application.DoEvents();
outputStream.Write(buffer, 0, readCount);
readCount = ftpStream.Read(buffer, 0, bufferSize);
}
ftpStream.Close();
outputStream.Close();
response.Close();
errorinfo = "Succeed";
return(true);
}
catch (Exception exx)
{
errorinfo = string.Format("因{0},无法下载", exx.Message);
return(false);
}
finally
{
ProcBar.Dispose();
ProcBar.Close();
}
}
/// <summary>
/// 续传文件
/// </summary>
/// <param name="filename"></param>
public bool Upload(string filename, long size, string path, out string errorinfo) //上面的代码实现了从ftp服务器上载文件的功能
{
FrmProcessBar frmbar = new FrmProcessBar();
frmbar.Show();
path = path.Replace("\\", "/");
FileInfo fileInf = new FileInfo(filename);
//string uri = "ftp://" + path + "/" + fileInf.Name;
string uri = "ftp://" + ftpServerIP + "/" + path + filename;
Connect(uri);//连接
// 默认为true，连接不会被关闭
// 在一个命令之后被执行
reqFTP.KeepAlive = false;
reqFTP.Timeout = 10000;
// 指定执行什么命令
reqFTP.Method = WebRequestMethods.Ftp.AppendFile;
// 上传文件时通知服务器文件的大小
reqFTP.ContentLength = fileInf.Length;
// 缓冲大小设置为kb
long procMax = (fileInf.Length - size) / 2048;
frmbar.SetFrmProcessBarMax(procMax);
frmbar.SetFrmProcessBarText("正在续传文件：" + filename);
int buffLength = 2048;
byte[] buff = new byte[buffLength];
int contentLen;
// 打开一个文件流(System.IO.FileStream) 去读上传的文件
FileStream fs = fileInf.OpenRead();
int value = 0;
try
{
StreamReader dsad = new StreamReader(fs);
fs.Seek(size, SeekOrigin.Begin);
// 把上传的文件写入流
Stream strm = reqFTP.GetRequestStream();
// 每次读文件流的kb
contentLen = fs.Read(buff, 0, buffLength);
// 流内容没有结束
while (contentLen != 0)
{
// 把内容从file stream 写入upload stream
value++;
frmbar.SetFrmProcessBarValue(value);
Application.DoEvents();
strm.Write(buff, 0, contentLen);
contentLen = fs.Read(buff, 0, buffLength);
}
// 关闭两个流
strm.Close();
fs.Close();
errorinfo = "Succeed";
return(true);
}
catch (Exception ex)
{
errorinfo = string.Format("因{0},无法完成上传", ex.Message);
return(false);
}
finally
{
if (null != fileInf)
{
fileInf = null;
}
frmbar.Close();
frmbar.Dispose();
}
}
