asp.net實現ftp上傳代碼(解決大文件上傳問題)

    原來使用asp.net上傳控件上傳 那個雖然簡單但是頁面不是很友好 然后就用了uploadify上傳控件  這個控件雖然界面友好 但是大文件還是不能上傳 而且在不同的瀏覽器會出現session丟失問題 所以我到了個ftp上傳的方法

    以下是具體代碼

 

using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.IO;
using System.Net;
using System.Text;

public partial class _Default : System.Web.UI.Page 
{
    //以下字段配置在web.config
    private string ftpServerIP = "127.0.0.1";//服務器ip
    private string ftpUserID = "FTPTEST";//用戶名FTPTEST
    private string ftpPassword = "ftptest";//密碼
    protected void Page_Load(object sender, EventArgs e)
    {

        if (MyFile.Value != "")
        {
            //string a = MyFile.;
        }
        
    }








    //ftp的上傳功能
    private void Upload(string filename)
    {
        FileInfo fileInf = new FileInfo(filename);

        string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;
        FtpWebRequest reqFTP;

        // 根據uri創建FtpWebRequest對象 
        reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP + "/" + fileInf.Name));

        // ftp用戶名和密碼
        reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);

        // 默認為true，連接不會被關閉
// 在一個命令之后被執行
        reqFTP.KeepAlive = false;

        // 指定執行什么命令
        reqFTP.Method = WebRequestMethods.Ftp.UploadFile;

        // 指定數據傳輸類型
        reqFTP.UseBinary = true;

        // 上傳文件時通知服務器文件的大小
        reqFTP.ContentLength = fileInf.Length;

        // 緩沖大小設置為2kb
        int buffLength = 2048;

        byte[] buff = new byte[buffLength];
        int contentLen;

        // 打開一個文件流 (System.IO.FileStream) 去讀上傳的文件
        FileStream fs = fileInf.OpenRead();
        try
        {
            // 把上傳的文件寫入流
            Stream strm = reqFTP.GetRequestStream();

            // 每次讀文件流的2kb
            contentLen = fs.Read(buff, 0, buffLength);

            // 流內容沒有結束
            while (contentLen != 0)
            {
                // 把內容從file stream 寫入 upload stream
                strm.Write(buff, 0, contentLen);

                contentLen = fs.Read(buff, 0, buffLength);
            }

            // 關閉兩個流
            strm.Close();
            fs.Close();
            this.Page.RegisterStartupScript("", "<script>alert('成功')</script>");
        }
        catch (Exception ex)
        {
            // MessageBox.Show(ex.Message, "Upload Error");
            Response.Write("Upload Error：" + ex.Message);
        }
    }


    //從ftp服務器上下載文件的功能
    private void Download(string filePath, string fileName)
    {
        FtpWebRequest reqFTP;

        try
        {
            FileStream outputStream = new FileStream(filePath + "\\" + fileName, FileMode.Create);

            reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP + "/" + fileName));

            reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;

            reqFTP.UseBinary = true;

            reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);

            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);

            while (readCount > 0)
            {
                outputStream.Write(buffer, 0, readCount);

                readCount = ftpStream.Read(buffer, 0, bufferSize);
            }

            ftpStream.Close();

            outputStream.Close();

            response.Close();
        }
        catch (Exception ex)
        {
            Response.Write("Download Error：" + ex.Message);
        }
    }

    //從ftp服務器上獲得文件列表
    public string[] GetFileList()
    {
        string[] downloadFiles;
        StringBuilder result = new StringBuilder();
        FtpWebRequest reqFTP;
        // HttpWebRequest reqFTP;
        try
        {
            reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP + "/"));
            reqFTP.UseBinary = true;
            reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
            reqFTP.Method = WebRequestMethods.Ftp.ListDirectory;
            WebResponse response = reqFTP.GetResponse();
            StreamReader reader = new StreamReader(response.GetResponseStream());
            string line = reader.ReadLine();
            while (line != null)
            {
                result.Append(line);
                result.Append("\n");
                line = reader.ReadLine();
            }
            // to remove the trailing '\n'        
            result.Remove(result.ToString().LastIndexOf('\n'), 1);
            reader.Close();
            response.Close();
            return result.ToString().Split('\n');
        }
        catch (Exception ex)
        {
            downloadFiles = null;
            return downloadFiles;
        }
    }

    protected void Button1_Click(object sender, EventArgs e)
    {
        Upload("F:\\美國隊長DVD中字.rmvb");
    }
    protected void Button2_Click(object sender, EventArgs e)
    {

    }
}