private static LatestVersionInformation getLatestVersionInformationFromServer(ServiceManager serviceManager)
{
LatestVersionInformation info = serviceManager.GetLatestVersionInfo();
if (info == null || String.IsNullOrWhiteSpace(info.VersionNumber))
{
return(null);
}
try
{
System.Version currentVersion = new System.Version(Application.ProductVersion);
System.Version latestVersion = new System.Version(info.VersionNumber);
if (currentVersion >= latestVersion)
{
return(null);
}
if (NewVersionInformation != null)
{
System.Version cachedLatestVersion = new System.Version(NewVersionInformation.VersionNumber);
if (cachedLatestVersion >= latestVersion)
{
return(null);
}
}
}
catch (ArgumentException ex)
{
ExceptionHandlers.Handle("Wrong version number", ex);
return(null);
}
return(info);
}
private static void copyNewVersionFromServer(LatestVersionInformation info)
{
if (info == null)
{
return;
}
string filename = Path.GetFileName(info.InstallerFilePath);
string tempFolder = Environment.GetEnvironmentVariable("TEMP");
string destFilePath = Path.Combine(tempFolder, filename);
Debug.Assert(!System.IO.File.Exists(destFilePath));
Trace.TraceInformation(String.Format(
"[StaticUpdateChecker] Copying from \"{0}\" to \"{1}\"...", info.InstallerFilePath, destFilePath));
try
{
System.IO.File.Copy(info.InstallerFilePath, destFilePath);
}
catch (Exception ex) // Any exception from System.IO.File.Copy()
{
ExceptionHandlers.Handle("Cannot download a new version", ex);
return;
}
Trace.TraceInformation("[StaticUpdateChecker] File copied");
onNewVersionCopiedFromServer(destFilePath, info.VersionNumber);
}
async private static Task checkForApplicationUpdatesAsync(ServiceManager serviceManager)
{
Trace.TraceInformation("[StaticUpdateChecker] Checking ServiceManager for the latest version information...");
LatestVersionInformation info = getLatestVersionInformationFromServer(serviceManager);
if (info == null)
{
return;
}
Trace.TraceInformation(String.Format("[StaticUpdateChecker] New version {0} is found", info.VersionNumber));
if (String.IsNullOrEmpty(info.InstallerFilePath) || !System.IO.File.Exists(info.InstallerFilePath))
{
Trace.TraceWarning(String.Format("[StaticUpdateChecker] Installer cannot be found at \"{0}\"",
info.InstallerFilePath));
return;
}
await Task.Run(() => copyNewVersionFromServer(info));
}