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通过文件流的方式上传文件

2009-03-26 20:49 260 查看

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" %>

<!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>无标题页</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:FileUpload ID="FileUpload1" runat="server" /><br />
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="ok" Width="67px" /> </div>
</form>
</body>
</html>

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：

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