Implementing online upgrades with C #

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Implementing online upgrades with C #

This is a WebService

Private Appupdate.updateserv Updatesvr;

private void Button1_Click (object sender, System.EventArgs e)
{

if (Linkwebservices () ==true)
{
this.label1.text= "Connect server .... Pass ";

if (Checkver () ==true)
{
this.label2.text= "Check the latest version and download ... Pass ";

}
Else
{
this.label2.text= "Check the latest version and download ... FAIL ";
}
}
Else
{
this.label1.text= "Connect server .... FAIL ";
}
}

This is used to establish a connection with the upgrade server
private bool Linkwebservices ()
{
Try
{
Updatesvr=new Updateserv ();
return true;
}
Catch
{
return false;
}
}

Call WebService to check if there is an updated version
private bool Checkver ()
{
string path =application.startuppath;
Try
{
Versioncheck (path);
return true;
}
catch (Exception ex)
{
MessageBox.Show (ex. ToString ());
return false;
}
}

private void Versioncheck (string despath)
{
Try
{
#region View files and directories
if (!despath.endswith (@ "\"))
Despath = @ "\";

if (! System.IO.Directory.Exists (Despath))
{
System.IO.Directory.CreateDirectory (Despath);
}

String TempPath = Despath + @ "tempdespathcache\";

if (System.IO.Directory.Exists (TempPath))
{
System.IO.Directory.Delete (temppath,true);
System.IO.Directory.CreateDirectory (TempPath);
}
Else
System.IO.Directory.CreateDirectory (TempPath);

if (! System.IO.File.Exists (Despath + "Updateconfig.xml"))
{
System.Xml.XmlDocument updateconfig = new System.Xml.XmlDocument ();
Updateconfig.loadxml (@ "<root></root>");
Updateconfig.save (Despath + "Updateconfig.xml");
}
#endregion

System.Xml.XmlDocument Serverxmldoc = Updatesvr.appupdatevertion ();
System.Xml.XmlDocument Localxmldoc = new System.Xml.XmlDocument ();
Localxmldoc.load (Despath + "Updateconfig.xml");
BOOL Newversionexist = false;
BOOL Moduleexist = false;
System.Xml.XmlNode serverNode0 = serverxmldoc.childnodes[0];
System.Xml.XmlNode localNode0 = localxmldoc.childnodes[0];
foreach (System.Xml.XmlNode servernode in serverNode0)
{
Moduleexist = false;
foreach (System.Xml.XmlNode localnode in localNode0)
{
Find the corresponding module
if (localnode.childnodes[0). InnerText = = Servernode.childnodes[0]. InnerText)
{
Moduleexist = true;
Version number judgment
if (Localnode.childnodes[1].innertext.compareto (servernode.childnodes[1). InnerText) < 0)
{
Newversionexist = true;
if (system.configuration.configurationsettings.appsettings["Netstyle"]. ToString () = "Internet")
{
DownloadFile (Servernode.childnodes[2]. Innertext,temppath + servernode.childnodes[0]. InnerText);
}
Else
{
DownloadFile (Servernode.childnodes[3]. Innertext,temppath + servernode.childnodes[0]. InnerText);
}
}
Break
}
}
No corresponding module found
if (false = = Moduleexist)
{

if (system.configuration.configurationsettings.appsettings["Netstyle"]. ToString () = "Internet")
{
DownloadFile (Servernode.childnodes[2]. Innertext,temppath + servernode.childnodes[0]. InnerText);
}
Else
{
DownloadFile (Servernode.childnodes[3]. Innertext,temppath + servernode.childnodes[0]. InnerText);
}
}
}
Write new Updateconfig.xml replace after upgrade complete
if (newversionexist)
{
Serverxmldoc.save (TempPath + "Updateconfig.xml");
if (Dialogresult.yes = = MessageBox.Show ("New version, update?", "hint", Messageboxbuttons.yesno))
{
string[] dirs = System.IO.Directory.GetFiles (TempPath, "*.*");
String FileName;
foreach (String dir in dirs)
{
FileName = (dir. Split (Convert.tochar (@))) [Dir. Split (Convert.tochar (@ ")). Length-1]);
if (System.IO.File.Exists (Despath + fileName))
{
TODO: Backup Previous versions can be supported
System.IO.File.Delete (Despath + fileName);
}
TODO: If the system is running, you have to stop the system, as to how to stop, you may be able to use System.Diagnostics.Process
System.IO.File.Move (Dir,despath + fileName);
}
MessageBox.Show ("upgrade completed");
}
Else
{
TODO: Can support a prompt upgrade
}
}
}
catch (Exception ex)
{
throw new Exception ("Upgrade failed because of:" + ex.) MESSAGE,EX);
}
}

Download the latest files

private void DownloadFile (String source,string fileName)
{
Try
{
System.Net.WebClient mywebclient = new System.Net.WebClient ();
Mywebclient.downloadfile (Source,filename);
}
catch (Exception ex)
{
throw new Exception ("Download failed because:" + ex.) MESSAGE,EX);
}
}