软件的自动更新实现
1.思路: 使用WebService来实现这一功能,Webservice中放一xml文件,用于存储版本和需要更新的列表.客户端应用程序在每次启动时,访问webservice,检查version,如果版本低则下载xml文件,启动AutoUpdate.exe进行更新.
2.步骤:
2.1 定义WebService
<?xml version="1.0" encoding="utf-8" ?>
<product>
<version>1.0.1818.42821</version>
<description>修正一些Bug</description>
<filelist count="2" sourcepath="./files/">
<item name="AutoUpdateTestDll.dll" size="">
<value />
</item>
<item name="AutoUpdateTest.exe" size="">
<value />
</item>
</filelist>
</product>
[WebMethod(Description="取得更新版本")]
public string GetVersion()
{
XmlDocument doc = new XmlDocument();
doc.Load(Server.MapPath("UpdateList.xml"));
XmlElement root = doc.DocumentElement;
return root.SelectSingleNode("version").InnerText;
}
[WebMethod(Description="获取更新的文件列表")]
public string GetUpdateFile()
{
//取得更新的xml模板内容
XmlDocument doc = new XmlDocument();
doc.Load(Server.MapPath("UpdateList.xml"));
XmlElement root = doc.DocumentElement;
//看看有几个文件需要更新
XmlNode updateNode = root.SelectSingleNode("filelist");
string path = updateNode.Attributes["sourcepath"].Value;
int count = int.Parse(updateNode.Attributes["count"].Value);
//将xml中的value用实际内容替换
for(int i=0;i<count;i++)
{
XmlNode itemNode = updateNode.ChildNodes[i];
string fileName = path + itemNode.Attributes["name"].Value;
FileStream fs = File.OpenRead(Server.MapPath(fileName));
itemNode.Attributes["size"].Value = fs.Length.ToString();
BinaryReader br = new BinaryReader(fs);
//这里是文件的实际内容，使用了Base64String编码
itemNode.SelectSingleNode("value").InnerText = Convert.ToBase64String(br.ReadBytes((int)fs.Length),0,(int)fs.Length);
br.Close();
fs.Close();
}
return doc.OuterXml;
}
2.2 定义AutoUpdate.exe
private void Form1_Load(object sender, System.EventArgs e)
{
//关闭当前程序.
this.CloseApplication();
//开始更新
UpdateFile();
}
private void CloseApplication()
{
try
{
//关闭SM进程
System.Diagnostics.Process[] process =
System.Diagnostics.Process.GetProcessesByName("AutoUpdateTest");
foreach(System.Diagnostics.Process pro in process)
{
if(!pro.CloseMainWindow())
{
pro.Kill();
}
}
}
catch(Exception)
{
Application.Exit();
}
}
private void UpdateFile()
{
XmlDocument doc = new XmlDocument();
doc.Load(Application.StartupPath + @"\UpdateList.xml");
XmlElement root = doc.DocumentElement;
XmlNode updateNode = root.SelectSingleNode("filelist");
string path = updateNode.Attributes["sourcepath"].Value;
int count = int.Parse(updateNode.Attributes["count"].Value);
//progressbar
this.progressBar1.Maximum = count;
for(int i=0;i<count;i++)
{
XmlNode itemNode = updateNode.ChildNodes[i];
string fileName = itemNode.Attributes["name"].Value;
FileInfo fi = new FileInfo(fileName);
fi.Delete();
//File.Delete(Application.StartupPath + @"\" + fileName);
this.Text = "正在更新：" + fileName + " (" + itemNode.Attributes["size"].Value + ") ...";
FileStream fs = File.Create(Application.StartupPath +"\\"+fileName);
fs.Write(System.Convert.FromBase64String(itemNode.SelectSingleNode("value").InnerText),0,int.Parse(itemNode.Attributes["size"].Value));
fs.Close();
//
this.progressBar1.PerformStep();
}
this.Text = "更新完成.";
string path2 = Application.StartupPath +@"\UpdateList.xml";
if(File.Exists(path2))
File.Delete(path2);
this.Text = "正在重新启动应用程序...";
System.Diagnostics.Process.Start("AutoUpdateTest.exe");
Close();
Application.Exit();
}
2.3 主应用程序 ,引用WebService
AutoUpdateService ser = new AutoUpdateService();
private void Form1_Load(object sender, System.EventArgs e)
{
ser = new UpdateService.UpdateService();
//访问服务器,检查版本是否一致
if(!this.CheckVersion())
{
//版本不一致,提示用户更新.
DialogResult res = MessageBox.Show(
"发现新版本,是否更新?",
"系统提示",
MessageBoxButtons.YesNo,
MessageBoxIcon.Question);
if(res == DialogResult.Yes)
this.StartUpdate();//则启动更新程序
}
}
private bool CheckVersion()
{
string ver = ser.GetVersion();
if(Application.ProductVersion.CompareTo(ver)<=0)
return false;
else
return true;
}
private void StartUpdate()
{
this.Close();
MyProgressBar frm = new MyProgressBar();
frm.Show();
this.DownloadFile();
frm.Close();
System.Diagnostics.Process.Start(Application.StartupPath+"\\AutoUpdate.EXE");
Application.Exit();
}
private void DownloadFile()
{
string xml = ser.GetUpdateFile();
System.Xml.XmlDocument doc = new System.Xml.XmlDocument();
doc.LoadXml(xml);
doc.Save(Application.StartupPath+"\\UpdateList.xml");
}
