public bool Download(string filePath, string fileName, bool overWriteLocalFile, TransmissionProcess transProcess, out string errorinfo)
{
if (transProcess == null)
{
transProcess = new TransmissionProcess();
}
errorinfo = string.Empty;
try
{
string str = Path.GetFileName(fileName);
string path = filePath + @"\" + str;
if (System.IO.File.Exists(path) && !overWriteLocalFile)
{
transProcess.TransStatus = TransferStatus.Failed;
errorinfo = string.Format("本地文件{0}已存在,无法下载", path);
return false;
}
if (System.IO.File.Exists(path))
{
try
{
System.IO.File.Move(path, path);
}
catch
{
transProcess.TransStatus = TransferStatus.Failed;
errorinfo = "本地文件被占用！无法覆盖！";
return false;
}
}
string str3 = "ftp://" + this.FtpServer + "/" + fileName;
this.Connect(str3);
this.FtpRequest.Credentials = new NetworkCredential(this.FtpUserName, this.FtpPassword);
FtpWebResponse response = (FtpWebResponse) this.FtpRequest.GetResponse();
Stream responseStream = response.GetResponseStream();
long contentLength = response.ContentLength;
int count = 0x800;
byte[] buffer = new byte[count];
transProcess.FileName = str3;
transProcess.TotalBytes = contentLength;
if (transProcess.TransStatus != TransferStatus.InTransit)
{
transProcess.TransStatus = TransferStatus.InTransit;
}
int bytes = responseStream.Read(buffer, 0, count);
transProcess.AppendBytes(bytes);
FileStream stream2 = new FileStream(path, FileMode.Create, FileAccess.Write);
while (bytes > 0)
{
stream2.Write(buffer, 0, bytes);
bytes = responseStream.Read(buffer, 0, count);
transProcess.AppendBytes(bytes);
}
responseStream.Close();
stream2.Close();
response.Close();
transProcess.FinishBytes();
return true;
}
catch (Exception exception)
{
transProcess.TransStatus = TransferStatus.Failed;
errorinfo = string.Format("因{0},无法下载", exception.Message);
return false;
}
}
public void Upload(string filename, string serverPath, TransmissionProcess transProcess)
{
if (transProcess == null)
{
transProcess = new TransmissionProcess();
}
FileInfo info = new FileInfo(filename);
string str = string.Format("ftp://{0}/{1}/{2}", this.FtpServer, serverPath, info.Name);
transProcess.FileName = str;
transProcess.TotalBytes = info.Length;
this.Connect(str);
this.FtpRequest.KeepAlive = false;
this.FtpRequest.Method = "STOR";
this.FtpRequest.ContentLength = info.Length;
int count = 2048;
byte[] buffer = new byte[count];
FileStream stream = info.OpenRead();
try
{
Stream requestStream = this.FtpRequest.GetRequestStream();
for (int i = stream.Read(buffer, 0, count); i != 0; i = stream.Read(buffer, 0, count))
{
if (transProcess.TransStatus != TransferStatus.InTransit)
{
transProcess.TransStatus = TransferStatus.InTransit;
}
requestStream.Write(buffer, 0, i);
transProcess.AppendBytes(i);
}
requestStream.Close();
stream.Close();
transProcess.TransStatus = TransferStatus.TranFinished;
}
catch (Exception exception)
{
transProcess.TransStatus = TransferStatus.Failed;
throw new Exception(string.Format("向服务器上传文件时出错！\n\n{0}", exception.Message));
}
}