FTP上传很慢,有没什么好的办法!

[烟灰洒落键盘]

需要往远程的服务器上传一些文件,上传很慢,我的程序是这样设计的,首先在本地生成文件,然后把文件上传到服务器上,生成和上传10kb左右的文件需要10s左右,但是随着文件的变大,这个时间呈现指数级别上升,当文件达到100KB左右的时候,往往需要5分钟左右的时间,不知道是什么原因! 后来我用Filezilla手动上传却很快,不知道是不是我的程序写的有问题,第一次写用ftp上传的代码,请各位高手帮忙找找问题!(远程的服务器在新加坡),下面是我的代码:

public void GenerateIdoc()
        {
            if (Checked())
            {
                string s_ConsignmentId = "";
                foreach (int RowIndex in ColumnSeleted)
                {
                    s_ConsignmentId = s_ConsignmentId + staticMethodClass.ToStringAndTrim(dgvdata.Rows[RowIndex].Cells[1].Value.ToString()) + ",";
                }
                s_ConsignmentId = s_ConsignmentId.Substring(0, s_ConsignmentId.LastIndexOf(","));
                string s_SqlConsignment = "SAP_ADMIN.P_INSERT_CONSIGNMENT";
                string sOb_no = "";
                string sConsignmentId = "";
                string s_IDocSql = "SELECT OB_NO,INDEX_NO,DATA FROM SAP_ADMIN.BELKIN_EDI_IDOC_TAB WHERE OB_NO=@Ob_No  ORDER BY INDEX_NO ASC";
                string s_Sql = "SAP_ADMIN.P_Belkin_Create_Idoc_Table";
                if (sqlExecute == null)
                {
                    sqlExecute = new SQLExecute();
                }
                try
                {

                    Hashtable hs_parameters = new Hashtable();
                    Hashtable hs_Para = new Hashtable();
                    hs_Para.Add("@ConsignmentId", s_ConsignmentId);
                    sqlExecute.executeProceduce(hs_Para, s_SqlConsignment);
                    hs_parameters.Add("@Return", 'N');
                    sqlExecute.executeProceduce(hs_parameters, s_Sql);
                    ReadIni Read = new ReadIni(staticVariableClass.s_IniFilePath);
                    FtpServerName = Read.ReadInivalue("FTPSERVE", "FTPSERVERNAME");
                    FtpUserName = Read.ReadInivalue("FTPSERVE", "FTPUSERNAME");
                    FtpPassword = Read.ReadInivalue("FTPSERVE", "FTPPASSWORD");

                    foreach (int RowIndex in ColumnSeleted)
                    {
                        Hashtable hs_CongimentId = new Hashtable();
                        sConsignmentId = staticMethodClass.ToStringAndTrim(dgvdata.Rows[RowIndex].Cells[1].Value.ToString());
                        hs_CongimentId.Add("@ConsignmentId", sConsignmentId);
                        string s_SqlSelect = "SELECT OB_NO FROM SAP_ADMIN.CONSIGNMENT_ORDER_TAB WHERE Consignment_Id=@ConsignmentId";
                        if (sqlExecute == null)
                        {
                            sqlExecute = new SQLExecute();
                        }
                        DataSet Ds_Consignment = sqlExecute.getDataset(s_SqlSelect, hs_CongimentId);
                        if (Ds_Consignment.Tables[0].Rows.Count > 0)
                        {
                            DataTableReader S_ObReader = Ds_Consignment.Tables[0].CreateDataReader();
                            while (S_ObReader.Read())
                            {
                                FilePath = Read.ReadInivalue("IDOCFILEPATH", "IDOC_PATH");
                                sOb_no = staticMethodClass.ToStringAndTrim(S_ObReader["OB_NO"].ToString());
                                Hashtable Hs_parameters = new Hashtable();
                                Hs_parameters.Add("@Ob_No", sOb_no);
                                DataSet Ds = new DataSet();
                                Ds = sqlExecute.getDataset(s_IDocSql, Hs_parameters);

                                FilePath = FilePath + "\\" + "Idoc_" + sOb_no + ".txt";
                                FileStream fs = new FileStream(FilePath, FileMode.OpenOrCreate);
                                StreamWriter Sw = new StreamWriter(fs);

                                DataTableReader Sdr = Ds.Tables[0].CreateDataReader();
                                while (Sdr.Read())
                                {
                                    Sw.Write(staticMethodClass.ToStringAndTrim(Sdr[2].ToString()) + "\r\n");
                                }
                                Sdr.Close();
                                Sw.Close();
                                fs.Close();
                                Upload(FilePath);
                            }
                             S_ObReader.Close();
                        }
                        string s_Sql2 = "UPDATE SAP_ADMIN.CONSIGNMENT_TAB SET S_FLAG_SEND='Y' WHERE Consignment_Id=@ConsignmentId ";
                        if (sqlExecute == null)
                        {
                            sqlExecute = new SQLExecute();
                        }
                        sqlExecute.executeSQL(hs_CongimentId, s_Sql2);
                    }
                }
                catch (Exception ex)
                {
                    staticMethodClass.showInformationMessageBox(ex.Message, "Information");
                    return;
                }
                staticMethodClass.showInformationMessageBox("IDoc File haves been send to Ftp! ", "Infomation");
            }
            else
            {
                staticMethodClass.showInformationMessageBox("Pls Select the data", "Information");
            }
        }

public void Upload(string filename)
        {
            FileInfo fileInf = new FileInfo(filename);
            string Uri = "ftp://" + FtpServerName + "/" + fileInf.Name;
            Connect(Uri);
            ReqFtp.KeepAlive = false;
            ReqFtp.Method = WebRequestMethods.Ftp.UploadFile;
            ReqFtp.ContentLength = fileInf.Length;
            int BuffLength = 2048;
            byte[] buff = new byte[BuffLength];
            int ContentLen;
            FileStream Fs = fileInf.OpenRead();
            try
            {
                Stream Strm = ReqFtp.GetRequestStream();
                ContentLen = Fs.Read(buff, 0, BuffLength);
                while (ContentLen != 0)
                {
                    Strm.Write(buff, 0, ContentLen);
                    Strm.Flush();
                    ContentLen = Fs.Read(buff, 0, BuffLength);
                }
                Strm.Close();
                Fs.Close();
            }
            catch (Exception ex)
            {
                staticMethodClass.showInformationMessageBox("Upload Error:" + ex.Message, "Information");
            }
        }

[烟灰洒落键盘]

看来是没有人回答了

[wangyue4]

以前做过，就在网上随便找了一个上传函数，没觉得很慢，C#不至于慢到那种程度。

[jshzp]

你找个国内甚至同城的服务器试试，就知道是否代码问题了。
另外注意一下是否你的客户端网速和服务器网速原因。

[只在此山中]

参考：
//ftp建立连接
try
{
Request = (FtpWebRequest)WebRequest.Create(uri);
Request.Method = FtpMathod;
Request.UseBinary = true;
Request.Credentials = new NetworkCredential(this.UserName, this.Password);
if (this.Proxy != null)
{
Request.Proxy = this.Proxy;
}
return (FtpWebResponse)Request.GetResponse();
}
catch (Exception ep)
{
ErrorMsg = ep.ToString();
throw ep;
}
//ftp上传文件
try
{
Response = Open(new Uri(this.Uri.ToString() + RemoteFileName), WebRequestMethods.Ftp.UploadFile);
Stream requestStream = Request.GetRequestStream();
MemoryStream mem = new MemoryStream(FileBytes);

byte[] buffer = new byte[1024];
int bytesRead = 0;
int TotalRead = 0;
while (true)
{
bytesRead = mem.Read(buffer, 0, buffer.Length);
if (bytesRead == 0)
break;
TotalRead += bytesRead;
requestStream.Write(buffer, 0, bytesRead);
}
requestStream.Close();
Response = (FtpWebResponse)Request.GetResponse();
mem.Close();
mem.Dispose();
FileBytes = null;
return true;
}
catch (Exception ep)
{
ErrorMsg = ep.ToString();
throw ep;
}

也可以用第3方组件，速度会快点。