为什么80%的码农都做不了架构师？>>> 
上传文件有四种方式
1：fileupload
2：ftp
3：网络共享
4：文件流写入
我们经常碰到这种困惑，大家都知道fileupload可以通过saveas方法存储文件，但是如果我们想把上传的文件写入到网络中其他服务器该怎么办呢？这样做有两个好处
1：文件集中存储
2：便于扩展
3：便于备份
因为我们接受上传的aspx.cs文件运行于某台服务器，但是我们要写入另外一台服务器，该怎么办呢？通常有三种方法：FTP、文件流写入、网络共享（我还没试验成功）
文件流写入DEMO：
index.aspx
<%@ Page Language="C#" AutoEventWireup="true" Debug="true" CodeFile="index.aspx.cs" Inherits="_Index" %>
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
http://www.w3.org/1999/xhtml" >
index.aspx.cs
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 _Index : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
if (FileUpload1.HasFile)
{
byte[] postdata = FileUpload1.FileBytes;
FileUpload1.SaveAs(@"D:\project\TestUpload\upload\" + FileUpload1.FileName);
HttpWebRequest httprequest = (HttpWebRequest)System.Net.WebRequest.Create("http://dxf.3g.cn:81/uploadfilestream.aspx?filename=" + FileUpload1.FileName);
httprequest.Method = "POST";
httprequest.KeepAlive = false;
httprequest.ContentType = "multipart/form-data";
httprequest.Timeout = 10*1000;
httprequest.ContentLength = postdata.Length;
Stream sr=httprequest.GetRequestStream();
sr.Write(postdata, 0, postdata.Length);
HttpWebResponse respon = (HttpWebResponse)httprequest.GetResponse();
if (httprequest.HaveResponse)
{
Response.Write("向另外一个服务器post成功");
HttpWebResponse rs = (HttpWebResponse)httprequest.GetResponse();
Stream rstream = respon.GetResponseStream();
StreamReader rstreamread = new StreamReader(rstream);
Response.Write(rstreamread.ReadToEnd());
}
else
{
Response.Write("向另外一个服务器post失败");
}
sr.Close();
}
}
}
另一台机器的代码
using System;
using System.Data;
using System.Configuration;
using System.Collections;
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 uploadfilestream : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string filename = Request["filename"];
Stream stream = Request.InputStream;
byte[] buffer = new byte[stream.Length];
stream.Read(buffer, 0, (int)stream.Length);
File.WriteAllBytes(@"D:\project\TestUploadStream\upload\" + filename, buffer);
Response.Write("上传成功" + filename);
/*
HttpWebRequest res = (HttpWebRequest)WebRequest.Create("http://dxf.3g.cn:81/test.aspx");
HttpWebResponse respon = (HttpWebResponse)res.GetResponse();
Stream restream= respon.GetResponseStream();
StreamReader srm = new StreamReader(restream);
Response.Write(srm.ReadToEnd());
* */
}
}
FTP写入：