public void CheckForUpdate()
{
try
{
WebClient client = new WebClient();
List <ApplicationVersion> versions = new List <ApplicationVersion>();
string index = client.DownloadString(Configuration.UpdateURL);
Regex pattern = new Regex(Configuration.ReleasePattern);
foreach (Match match in pattern.Matches(index))
{
string filename = match.Value;
string revisionString = match.Groups[1].Value;
int revision = Convert.ToInt32(revisionString);
ApplicationVersion version = new ApplicationVersion(filename, revision);
versions.Add(version);
}
if (versions.Count == 0)
{
WriteLine("No versions of this application are being offered by the update server - this should never happen.");
return;
}
//Sort the archives by revision to easily determine the newest one
versions.Sort();
NewestVersion = versions[0];
int newestRevision = NewestVersion.Revision;
if (CurrentRevision < newestRevision || Configuration.ForceUpdate)
{
WriteLine("The current version of this software (r{0}) is outdated. The newest version available is r{1}.", CurrentRevision, newestRevision);
if (UpdateHandler != null)
{
UpdateHandler.UpdateDetected(CurrentRevision, NewestVersion);
}
else
{
DownloadUpdate(false);
}
}
else if (CurrentRevision == newestRevision)
{
WriteLine("This software is up to date.");
}
else
{
WriteLine("The current version (r{0}) is newer than the most recent version of this software available (r{1}).", CurrentRevision, newestRevision);
}
}
catch (ArgumentException exception)
{
WriteLine("Invalid update release pattern specified: {0}", exception.Message);
}
catch (WebException exception)
{
WriteLine("Unable to determine the latest version of this software: {0}", exception.Message);
}
}