asp.net web大文件传输 4G以上（调用CMD FTP）

using System.IO;

using System.Diagnostics;

        public bool UploadFileToFTPByCmd(string LocalPath)
        {
            string _strFtpIP = "172.16.2.15";
            string _strFtpPort = "21";
            string _strFtpUserName = "test";
            string _strFtpPassword = "test";
            string _strFtpFoloderPath = @"D:FTP";

            if (!File.Exists(LocalPath))
            {
                this.ClientScript.RegisterStartupScript(this.GetType(), "alert", "<script>alert('文件未生成成功，请检查！');</script>");
                return false;
            }
            else
            {
                FileStream fs = null;
                string _strScriptFolderPath = Path.GetDirectoryName(LocalPath) + "";
                if (!Directory.Exists(_strScriptFolderPath))
                {
                    Directory.CreateDirectory(_strScriptFolderPath);
                }

                string _strScriptFilePath = _strScriptFolderPath + @"FtpScript" + DateTime.Now.ToString("yyyyMMddHHmmssfff") + ".txt";
                if (File.Exists(_strScriptFilePath))
                {
                    fs = new FileStream(_strScriptFilePath, FileMode.Append);
                }
                else
                {
                    fs = new FileStream(_strScriptFilePath, FileMode.Create);
                }

                string _strOpenFtpUrl = "open " + _strFtpIP + " " + _strFtpPort;
                string _strCdFtpFolderPath = "cd " + _strFtpFoloderPath;
                string _strPutFile = "put " + LocalPath;
                StreamWriter sw = new StreamWriter(fs, System.Text.Encoding.GetEncoding("GB2312"));
                sw.WriteLine("ftp");
                sw.WriteLine(_strOpenFtpUrl);
                sw.WriteLine(_strFtpUserName);
                sw.WriteLine(_strFtpPassword);
                sw.WriteLine(_strCdFtpFolderPath);
                sw.WriteLine(_strPutFile);
                sw.WriteLine("quit");
                sw.WriteLine("exit");
                sw.Close();

                string _strCommand = @"FTP -v -i -s:" + _strScriptFilePath;
                string _strReturnValue = RunCmd(_strCommand);
                if (_strReturnValue.ToUpper().IndexOf("FILE RECEIVED OK") < 0)
                {
                    this.ClientScript.RegisterStartupScript(this.GetType(), "alert", "<script>alert('Ftp传输失败！');</script>");
                    return false;
                }
            }
            return true;

        }
        public string RunCmd(string command)
        {
            Process p = null;
            try
            {
                //实例一个Process类，启动一个独立进程   
                p = new Process();

                //Process类有一个StartInfo属性，这个是ProcessStartInfo类，包括了一些属性和方法，下面我们用到了他的几个属性：  

                p.StartInfo.FileName = "cmd.exe";           //设定程序名   
                p.StartInfo.Arguments = "/c " + command;    //设定程式执行参数   
                p.StartInfo.UseShellExecute = false;        //关闭Shell的使用   
                p.StartInfo.RedirectStandardInput = true;   //重定向标准输入   
                p.StartInfo.RedirectStandardOutput = true;  //重定向标准输出   
                p.StartInfo.RedirectStandardError = true;   //重定向错误输出   
                p.StartInfo.CreateNoWindow = true;          //设置不显示窗口

                p.Start();   //启动   
                p.StandardInput.WriteLine("exit");        //不过要记得加上Exit要不然下一行程式执行的时候会当机   
                return p.StandardOutput.ReadToEnd();        //从输出流取得命令执行结果   
            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                if (p != null)
                    p.Close();
            }
        }

//调用

        protected void btnCMDFTP_Click(object sender, EventArgs e)
        {
            if (txtFileUpload.HasFile)
            {
                if (UploadFileToFTPByCmd(txtFileUpload.PostedFile.FileName))
                {
                    this.ClientScript.RegisterStartupScript(this.GetType(), "alert", "<script>alert('上传成功！');</script>");
                }
            }
        }

优点：基本可以实现，速度不错，无需要安装第三方软件

缺点：无法隐藏FTP账号，无法重命名文件