前期準備：
ftp：伺服器的配置。(為ftp上傳使用)。
注意：
1.要是你測試用，ftp就在你自己開發的機器上配置，一定別忘了要先建立使用者。且該使用者一定要有可讀寫的許可權！要不然會出現ftp 530錯誤！
2.配置iis的ftp的時候一定把ftp的響應資訊寫成英文的，要不然會出現“基礎串連已經關閉: 伺服器提交了協議衝突。”錯誤。
3.配置iis的ftp的時候最好不要使用匿名登陸！要不也會出現530錯誤！
開始：
（一） web.config檔案的配置
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<connectionStrings/>
<system.web>
<compilation debug="false" />
<authentication mode="Windows" />
<httpRuntime maxRequestLength = "1048576"/><!--這個一定要寫上，要不然上傳的檔案大於1M的時候就可能出錯！預設支援是4M的，不過不穩定-->
</system.web>
<appSettings>
<add key="download" value="/downLoad/aa.txt"/>
<add key="upload" value="/upLoad/"/>
</appSettings>
</configuration>
(二)aspx檔案
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>無標題頁</title>
</head>
<body style="text-align:center;">
<form id="form1" runat="server" method="post">
<div style="border:1px dotted red;width:400px;height:200px;text-align:left;">
請選擇要上傳的檔案：
<asp:FileUpload ID="filePathName" runat="server" />
<br/><br/>
<asp:Button ID="Button1" runat="server" Text="檔案上傳到ftp伺服器" OnClick="Button1_Click" />
<asp:Button ID="Button3" runat="server" Text="檔案上傳到web伺服器" OnClick="Button3_Click" /></div>
<br/>
<div style="border:1px dotted red;width:400px;height:200px;text-align:left;">
下載伺服器的資源檔： <br/>
<asp:Button ID="Button2" runat="server" Text="檔案下載" OnClick="Button2_Click" /></div>
</form>
</body>
</html>
(三).cs檔案
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.IO;
using System.Net;
public partial class _Default : System.Web.UI.Page
{
private string downFile = null;
private string upLoadPath = null;
protected void Page_Load(object sender, EventArgs e)
{
// 擷取配置的路徑
downFile = Server.MapPath(".") + ConfigurationManager.AppSettings.Get("download");
upLoadPath = Server.MapPath(".") + ConfigurationManager.AppSettings.Get("upload");
}
#region【檔案上傳】
// ftp檔案上傳
// fs：要上傳的檔案流，size：上傳檔案的大小，type：上傳檔案類型，fileNewname：要在伺服器上儲存的名稱
private void FileFtpUpload(string fileNewname, string type, long size, Stream fs)
{
string strFileName = "";
// 合成後的檔案名稱
strFileName = fileNewname + DateTime.Now.Millisecond + "." + type;
// 根據uri建立FtpWebRequest對象
FtpWebRequest reqFTP;
reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://192.168.100.81/" + strFileName));
// ftp使用者名稱和密碼
reqFTP.Credentials = new NetworkCredential("yans", "123456");
// 銷毀到伺服器的串連
reqFTP.KeepAlive = true;
// 擷取或設定要發送到 FTP 伺服器的命令。
reqFTP.Method = WebRequestMethods.Ftp.UploadFile;
// 傳輸檔案的資料格式Binary
reqFTP.UseBinary = true;
// 檔案是多大
reqFTP.ContentLength = size;
// 緩衝大小設定為2kb
int buffLength = 2048;
byte[] buff = new byte[buffLength];
int contentLen;
try
{
Stream strm = reqFTP.GetRequestStream();
// 把檔案讀入到流中
// FileStream fs = fileInf.OpenRead();
// 用於儲存要由當前請求發送到伺服器的資料。
// 把檔案流分裝成小的位元組數組，防止佔用太多的伺服器記憶體
contentLen = fs.Read(buff, 0, buffLength);
// 迴圈把檔案流寫入待發給ftp伺服器的請求流中
while (contentLen != 0)
{
strm.Write(buff, 0, contentLen);
contentLen = fs.Read(buff, 0, buffLength);
}
fs.Close();
strm.Close();
}
catch (Exception e)
{
Response.Write(e.Message.ToString());
}
}
protected void Button1_Click(object sender, EventArgs e)
{
if (filePathName.FileName != "")
{
// 擷取檔案名稱
string name = filePathName.FileName;
// 取得裡最後一個"."的索引
int i = name.LastIndexOf(".");
// 取得副檔名
string type = name.Substring(i);
FileFtpUpload(filePathName.FileName, type, filePathName.PostedFile.ContentLength, filePathName.FileContent);
}
else
{
Response.Write("<font color='red'>請選擇上傳的檔案!</font>");
}
}
// http檔案上傳
public void FileHttpUpLoad()
{
// 檢查上傳檔案不為空白
if (filePathName.FileName.LastIndexOf(".") > 0)
{
// 擷取檔案名稱
string name = filePathName.FileName;
// 取得裡最後一個"."的索引
int i = name.LastIndexOf(".");
// 取得副檔名
string type = name.Substring(i);
// 儲存檔案
filePathName.SaveAs(upLoadPath + name + "." + type);
}
}
protected void Button3_Click(object sender, EventArgs e)
{
if (filePathName.FileName != "")
{
FileHttpUpLoad();
}
else
{
Response.Write("<font color='red'>請選擇上傳的檔案!</font>");
}
}
#endregion
#region 【檔案下載】
/// <summary>
/// http檔案下載
/// </summary>
/// <param name="strTempFile">要下載檔案的路徑</param>
/// <param name="strNewFileName">下載後，預設儲存的檔案名稱</param>
/// <param name="strNewFileName">儲存檔案的類型</param>
public void FileDownLoad(string strTempFile, string strNewFileName, string Type)
{
// 檔案下載響應設定
string strTime = DateTime.Now.ToString("yyyyMMddHHmmss");
FileInfo fi = new FileInfo(strTempFile);
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.ClearHeaders();
HttpContext.Current.Response.ContentType = "application/octet-stream";
string strFileName = HttpUtility.UrlEncode(strNewFileName) + "_" + strTime + "." + Type;
HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=" + strFileName);
HttpContext.Current.Response.AppendHeader("Content-Length", fi.Length.ToString());
// 輸出伺服器檔案，下載到用戶端
HttpContext.Current.Response.TransmitFile(strTempFile);
HttpContext.Current.Response.Flush();
HttpContext.Current.Response.Close();
// 必須終止
HttpContext.Current.Response.End();
}
// 下載
protected void Button2_Click(object sender, EventArgs e)
{
this.FileDownLoad(downFile, "yans", "txt");
}
#endregion
}
<=========================注意==============================>
如有朋友轉載，請著名原帖地址（http://www.cnblogs.com/yansheng9988）！該貼是新創貼！謝謝！
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