public void CheckVersion()
{
WebClient wc = new WebClient();
wc.Proxy = null;
wc.OpenReadCompleted += (sender, args) => Connected(this, Empty);
wc.DownloadProgressChanged += (sender, args) => DownloadProgressChanged(this, args);
wc.DownloadStringCompleted += (sender, args) => {
if (args.Cancelled || args.Error != null)
UpdateCheckFailed(this, Empty);
else {
try {
XmlDocument xd = new XmlDocument();
xd.LoadXml(args.Result);
var versionNode = xd["version"];
var version = Version.Parse(versionNode["version_string"].InnerText);
var releaseDate = DateTime.ParseExact(versionNode["release_date"].InnerText.Trim(), "yyyy'-'M'-'d", null);
string releaseNotes = versionNode["release_notes"].InnerText;
string url = versionNode["url"].InnerText;
if (version > Assembly.GetExecutingAssembly().GetName().Version)
UpdateAvailable(this, new UpdateAvailableArgs {
DownloadUrl = url,
ReleaseDate = releaseDate,
ReleaseNotes = releaseNotes,
Version = version,
});
else
AlreadyLatest(this, Empty);
}
catch {
UpdateCheckFailed(this, Empty);
}
}
};
// trigger the download..
wc.DownloadStringAsync(new Uri(UpdateCheckHost + UpdateCheckPage));
}
private void PerformUpdateCheck()
{
var uc = new UpdateChecker();
uc.AlreadyLatest += (o, e) => UpdateStatus("already latest version", 100);
uc.Connected += (o, e) => UpdateStatus("connected", 10);
uc.DownloadProgressChanged += (o, e) => { /* care, xml is small anyway */ };
uc.UpdateCheckFailed += (o, e) => UpdateStatus("update check failed", 100);
uc.UpdateAvailable += (o, e) =>
{
UpdateStatus("update available", 100);
var dr =
MessageBox.Show(
string.Format(
"An update to version {0} released on {1} is available. Release notes: \r\n\r\n{2}\r\n\r\nUpdate now?",
e.Version.ToString(), e.ReleaseDate.ToShortDateString(), e.ReleaseNotes), "Update available",
MessageBoxButtons.YesNo, MessageBoxIcon.Information, MessageBoxDefaultButton.Button1);
if (dr == DialogResult.Yes)
{
DownloadAndUpdate(e.DownloadUrl);
}
};
uc.CheckVersion();
}
