1、自动更新程序主要负责从服务器中获取相应的更新文件，并且把这些文件下载到本地，替换现有的文件。达到修复Bug，更新功能的目的。用户手工点击更新按钮启动更新程序。已测试。
2、环境VS2008，采用C#.NET和ASP.NET实现。
3、服务器：提供下载文件，发布出去。 文件包括：dll, xml,aspx等格式文件。其中update.xml 是记录更新文件的。
4、客户端：项目里面添加一个autoupdate.xml 文件，该文件里有连接服务器的发布更新文件的服务器地址。当客户端里userupdate.xml文件里的版本号和服务器中update.xml里的版本号对比，如果服务器的版本号高，提醒客户端更新。
5、源代码如下所示。
1）、服务端发布至IIS如下图所示。
图1
![ASP.NET网站版本自动更新程序及代码[转]](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmFXMWhaMlV6TVM0ek5qQmtiMk11WTI5dEwwUnZkMjVzYjJGa1NXMW5Mekl3TVRFdk1EWXZNalV4TkM4eE16TTBNelEwTmw4eExtcHdadz09LmpwZw%3D%3D.jpg?w=700&webp=1 "ASP.NET网站版本自动更新程序及代码[转]")
其中bin目录下的dll文件属性写入打勾。
图2
![ASP.NET网站版本自动更新程序及代码[转]](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmFXMWhaMlV6TVM0ek5qQmtiMk11WTI5dEwwUnZkMjVzYjJGa1NXMW5Mekl3TVRFdk1EWXZNalV4TkM4eE16TTBNelEwTmw4eUxtcHdadz09LmpwZw%3D%3D.jpg?w=700&webp=1 "ASP.NET网站版本自动更新程序及代码[转]")
Update.xml源码如下所示。
代码 <update>
<version>1.0.1.9</version>
<datetime>2009-12-14 </datetime>
<filelist filescount="5" itemcount="11" sourcepath="http://Localhost/UpdateServ/"> <file filesname="" >
<item name="xiaxia.txt" size="">
</item>
</file>
<file filesname="UpFile">
<item name="2222.dll" size="">
</item>
<item name="1162193918505.doc" size="">
</item>
<item name="xd.doc" size="">
</item>
<item name="s2.txt" size="">
</item>
<item name="a.dll" size="">
</item>
<item name="WebUPFILE.dll" size="">
</item>
</file> <file filesname="test"> <item name="aa.txt" size="">
</item>
<item name="2.txt" size="">
</item>
</file> <file filesname="Copy"> <item name="bb.doc" size="">
</item>
<item name="b.dll" size="">
</item>
</file> <file filesname="hehe"> <item name="hehe.txt" size="">
</item>
<item name="WebUPFILE.dll" size="">
</item>
</file> </filelist>
</update>
2）、客户端代码，结构如下图所示。
图3
![ASP.NET网站版本自动更新程序及代码[转]](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmFXMWhaMlV6TVM0ek5qQmtiMk11WTI5dEwwUnZkMjVzYjJGa1NXMW5Mekl3TVRFdk1EWXZNalV4TkM4eE16TTBNelEwTmw4MUxtcHdadz09LmpwZw%3D%3D.jpg?w=700&webp=1 "ASP.NET网站版本自动更新程序及代码[转]")
代码内有注释，在此不再多说。
Config.cs
代码 using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Xml; namespace WebUpdate
{
public class Config
{
public string url = null;
public string cmd = null; //读文件autoUpdate.xml
public Config()
{
string path = AppDomain.CurrentDomain.BaseDirectory + "autoUpdate.xml"; try
{
if (path != null)
{
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(path);
url = xmlDoc.SelectSingleNode("/update/url").InnerText; }
}
catch (Exception ex)
{
throw new Exception("找不到autoUpdate.xml文件" + ex.Message); }
} //获取服务器的版本
public Version GetServerVersion()
{
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(url);
return new Version(xmlDoc.SelectSingleNode("/update/version").InnerText);
} //获取客户端版本
public string GetClientVersion()
{
url = AppDomain.CurrentDomain.BaseDirectory + "userVersion.xml";
XmlDocument xmlUser = new XmlDataDocument();
xmlUser.Load(url);
XmlElement root = xmlUser.DocumentElement;
XmlNode updateNode = root.SelectSingleNode("version");
string version = updateNode.Attributes["value"].Value;
return version; } //为了进行版本比较，进行转换为整数比较
public int ConvertVersion(string value)
{
int w, z, x, y, temp;
w = int.Parse(value.Substring(, ));
z = int.Parse(value.Substring(, ));
x = int.Parse(value.Substring(, ));
y = int.Parse(value.Substring(, ));
temp = w * + z * + x * + y;
return temp;
} //更新客户版本号为服务器的版本号
public string UpdateVersion(string serVersion)
{
url = AppDomain.CurrentDomain.BaseDirectory + "userVersion.xml";
XmlDocument xmlUser = new XmlDataDocument();
xmlUser.Load(url);
XmlElement root = xmlUser.DocumentElement;
XmlNode updateNode = root.SelectSingleNode("version");
string strVer = updateNode.Attributes["value"].Value;
updateNode.Attributes["value"].Value = serVersion;
xmlUser.Save(url);
return serVersion;
} }
}
DownFile.cs
代码 using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.IO; namespace WebUpdate
{
public class DownFile
{
//从服务器下载文件,若目录存在，直接复制新文件，不存在则新建目录并复制文件，成功后返回1
public bool DownFileFromServ(string url, string fileName)
{
bool downsucess = false;
try
{
string fileExtraName = url.Split(char.Parse("."))[]; //文件名
string fileAfterName = System.IO.Path.GetExtension(url); //文件的扩展名
if (fileAfterName == ".aspx")
url = fileAfterName + ".txt";
HttpWebRequest myReq = (HttpWebRequest)WebRequest.Create(url);
myReq.KeepAlive = true;
HttpWebResponse myRes = (HttpWebResponse)myReq.GetResponse(); downsucess = this.CopyFileAndDirectory(myRes, fileName); }
catch (Exception e)
{
Console.WriteLine(e.ToString());
} return downsucess;
} //返回复制文件或创建目录是否成功
public bool CopyFileAndDirectory(WebResponse myResp, string fileName)
{
bool flag = true;
byte[] buffer = new byte[0x400];
try
{
int num;
//若本身已有该目录则删除
if (System.IO.File.Exists(fileName))
{
System.IO.File.Delete(fileName);
}
//创建目录更新到Updat目录下
string directoryName = Path.GetDirectoryName(fileName);
if (!Directory.Exists(directoryName))
{
Directory.CreateDirectory(directoryName);
} //指定文件fileName不存在时创建它
Stream streamRead = System.IO.File.Open(fileName, FileMode.Create); Stream responseStream = myResp.GetResponseStream(); do
{
//从当前读取的字节流数,复制
num = responseStream.Read(buffer, , buffer.Length);
if (num > )
{
streamRead.Write(buffer, , num);
}
}
while (num > );
streamRead.Close();
responseStream.Close();
}
catch
{
flag = false;
} return flag; } }
}
Update.cs
代码 using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml; namespace WebUpdate
{
public class Update
{
//从服务器文件update.xml中获取要下载的文件列表
public bool flag = false; public string[] GetFileList(string url)
{
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(url);
XmlElement root = xmlDoc.DocumentElement;
XmlNode updateNode = root.SelectSingleNode("filelist");
string soucePath = updateNode.Attributes["sourcepath"].Value; string fileName = null;
string fileList = null;
//取出服务器里update.xml里更新的file文件
XmlNodeList fileNode = updateNode.SelectNodes("file");
if (fileNode != null)
{
foreach (XmlNode i in fileNode)
{
foreach (XmlNode j in i)
{
if (i.Attributes["filesname"].Value != "")
fileName = soucePath + i.Attributes["filesname"].Value + "/" + j.Attributes["name"].Value +
"$" + i.Attributes["filesname"].Value + "/" + j.Attributes["name"].Value;
else
fileName = soucePath + j.Attributes["name"].Value +
"$" + j.Attributes["name"].Value; fileName += ",";
fileList += fileName;
}
} string[] splitFile = fileList.Split(',');
flag = true;
return splitFile;
}
return null;
} }
}
autoUpdate.xml
<update>
<url>http://Localhost/UpdateServ/update.xml</url>
</update>
userVersion.xml
<?xml version="1.0" encoding="utf-8"?>
<update>
<version value="1.0.1.9">客户端版本号</version>
</update>
Update.aspx
代码 <%@ Page Language="C#" AutoEventWireup="true" CodeFile="Update.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>自动更新</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<br />
<br />
<asp:Label ID="lblDisplay" runat="server" style="text-align: center" mce_style="text-align: center"
Text="Label" Visible="False"></asp:Label>
<br />
<br />
<asp:Button ID="btnUpdate" runat="server" style="text-align: center" mce_style="text-align: center"
Text="更新" onclick="btnUpdate_Click" Visible="False" Height="34px"
Width="145px" />
<br />
<br />
<asp:Label ID="NewVersion" runat="server" Text="Label1" Visible="false"></asp:Label>
<br />
<br />
<asp:Label ID="CurrentVersion" runat="server" Text="Label2" Visible="false"></asp:Label>
</div>
</form>
</body>
</html>
Update.aspx.cs
代码 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 WebUpdate; public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
lblDisplay.Text = "";
btnUpdate.Visible = false; Config cf = new Config(); NewVersion.Text = cf.GetServerVersion().ToString();
CurrentVersion.Text = cf.GetClientVersion().ToString(); int clientversion = cf.ConvertVersion(CurrentVersion.Text);
int serverversion = cf.ConvertVersion(NewVersion.Text);
if (serverversion > clientversion)
{
btnUpdate.Visible = true;
}
else
{
lblDisplay.Text = "已是最新版本，不需要更新！";
lblDisplay.Visible = true;
} }
protected void btnUpdate_Click(object sender, EventArgs e)
{
string url = null;
string[] files = null;
Config updatecf = new Config();
url = updatecf.url;
Update upd = new Update();
files = upd.GetFileList(url); UpdateFile(files); CurrentVersion.Text = updatecf.UpdateVersion(NewVersion.Text); lblDisplay.Text = "更新完成。";
lblDisplay.Visible = true;
btnUpdate.Visible = false; } private void UpdateFile(string[] files)
{
if ((files == null) || (files.Length <= ))
{
Response.Write("升级完成");
}
else
{
int num = ;
for (int i = ; i < files.Length; i++)
{
string str = files[i];
if ((str != null) && (str.Split(new char[] { '$' }).Length == ))
{
string[] strArray = str.Split(new char[] { '$' });
this.UpdateFile(strArray[], strArray[]);
num++;
}
}
if (num == )
{
Response.Write("升级完成");
}
}
} private void UpdateFile(string url, string filename)
{
string fileName = AppDomain.CurrentDomain.BaseDirectory + filename;
try
{
DownFile file = new DownFile();
bool flag = file.DownFileFromServ(url, fileName);
}
catch
{ }
}
}