using System;
using System.Collections.Generic;
using System.Text;
using System.Reflection;
using System.IO;
using System.Net;
using System.Xml;
namespace Update
{
/// <summary>
/// 更新完成触发的事件
/// </summary>
public delegate void UpdateState();
/// <summary>
/// 程序更新
/// </summary>
public class SoftUpdate
{
private string download;
private const string updateUrl = "http://www.phpstudy.net/update.xml";//升级配置的XML文件地址
#region 构造函数
public SoftUpdate() { }
/// <summary>
/// 程序更新
/// </summary>
/// <param name="file">要更新的文件</param>
public SoftUpdate(string file,string softName) {
this.LoadFile = file;
this.SoftName = softName;
}
#endregion
#region 属性
private string loadFile;
private string newVerson;
private string softName;
private bool isUpdate;
/// <summary>
/// 或取是否需要更新
/// </summary>
public bool IsUpdate
{
get
{
checkUpdate();
return isUpdate;
}
}
/// <summary>
/// 要检查更新的文件
/// </summary>
public string LoadFile
{
get { return loadFile; }
set { loadFile = value; }
}
/// <summary>
/// 程序集新版本
/// </summary>
public string NewVerson
{
get { return newVerson; }
}
/// <summary>
/// 升级的名称
/// </summary>
public string SoftName
{
get { return softName; }
set { softName = value; }
}
#endregion
/// <summary>
/// 更新完成时触发的事件
/// </summary>
public event UpdateState UpdateFinish;
private void isFinish() {
if(UpdateFinish != null)
UpdateFinish();
}
/// <summary>
/// 下载更新
/// </summary>
public void Update()
{
try
{
if (!isUpdate)
return;
WebClient wc = new WebClient();
string filename = "";
string exten = download.Substring(download.LastIndexOf("."));
if (loadFile.IndexOf(@"\") == -1)
filename = "Update_" + Path.GetFileNameWithoutExtension(loadFile) + exten;
else
filename = Path.GetDirectoryName(loadFile) + "\\Update_" + Path.GetFileNameWithoutExtension(loadFile) + exten;
wc.DownloadFile(download, filename);
wc.Dispose();
isFinish();
}
catch
{
throw new Exception("更新出现错误，网络连接失败！");
}
}
/// <summary>
/// 检查是否需要更新
/// </summary>
public void checkUpdate()
{
try {
WebClient wc = new WebClient();
Stream stream = wc.OpenRead(updateUrl);
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(stream);
XmlNode list = xmlDoc.SelectSingleNode("Update");
foreach(XmlNode node in list) {
if(node.Name == "Soft" && node.Attributes["Name"].Value.ToLower() == SoftName.ToLower()) {
foreach(XmlNode xml in node) {
if(xml.Name == "Verson")
newVerson = xml.InnerText;
else
download = xml.InnerText;
}
}
}
Version ver = new Version(newVerson);
Version verson = Assembly.LoadFrom(loadFile).GetName().Version;
int tm = verson.CompareTo(ver);
if(tm >= 0)
isUpdate = false;
else
isUpdate = true;
}
catch(Exception ex) {
throw new Exception("更新出现错误，请确认网络连接无误后重试！");
}
}
/// <summary>
/// 获取要更新的文件
/// </summary>
/// <returns></returns>
public override string ToString()
{
return this.loadFile;
}
}
}

<?xml version="1.0" encoding="utf-8" ?>
<Update>
<Soft Name="BlogWriter">
<Verson>1.0.1.2</Verson>
<DownLoad>http://www.phpstudy.net/BlogWrite.rar</DownLoad>
</Soft>
</Update>

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Threading;
using System.Net;
using System.Xml;
using Update;
namespace UpdateTest
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
checkUpdate();
}
public void checkUpdate()
{
SoftUpdate app = new SoftUpdate(Application.ExecutablePath, "BlogWriter");
app.UpdateFinish += new UpdateState(app_UpdateFinish);
try
{
if (app.IsUpdate && MessageBox.Show("检查到新版本，是否更新？", "Update", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
{
Thread update = new Thread(new ThreadStart(app.Update));
update.Start();
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
void app_UpdateFinish() {
MessageBox.Show("更新完成，请重新启动程序！", "Update", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
}