private static bool CheckForUpdate(UpdateInfoEventArgs args)
{
Assembly assembly = Assembly.GetEntryAssembly();
args.InstalledVersion = assembly.GetName().Version;
args.IsUpdateAvailable = new Version(args.CurrentVersion) > args.InstalledVersion;
return(args.IsUpdateAvailable);
}
/// <summary>
/// Prüft anhand der XML - Datei, ob eine neue Version verfügbar ist
/// </summary>
/// <param name="xmlLink"></param> URL or path of the xml file that contains information about latest version of the application.
public static async void Start(string xmlLink)
{
try
{
XmlLink = new Uri(xmlLink);
UpdateInfoEventArgs updateInfo = null;
if (XmlLink.Scheme.Equals(Uri.UriSchemeHttp) || XmlLink.Scheme.Equals(Uri.UriSchemeHttps))
{
connectionType = new ConnectionTypeWeb();
}
else if (XmlLink.Scheme.Equals(Uri.UriSchemeFile))
{
connectionType = new ConnectionTypeFile();
}
updateInfo = await connectionType.ReadXmlFileAsync(XmlLink);
bool IsUpdateAvailable = CheckForUpdate(updateInfo);
// TODO: Wollen Sie das Update durchführen?
Uri downloadLink = new Uri(updateInfo.DownloadURL);
if (downloadLink.Scheme.Equals(Uri.UriSchemeHttp) || downloadLink.Scheme.Equals(Uri.UriSchemeHttps))
{
connectionType = new ConnectionTypeWeb();
}
else if (downloadLink.Scheme.Equals(Uri.UriSchemeFile))
{
connectionType = new ConnectionTypeFile();
}
connectionType.DownloadProgressChanged += DownloadUpdateProgressChanged;
await connectionType.StartDownloadAsync(updateInfo.DownloadURL, Path.GetFullPath(updateInfo.DownloadFileName));
Console.WriteLine($"***** {updateInfo.DownloadURL} *****");
}
catch (Exception exception)
{
ShowError(exception);
}
}
public async Task <UpdateInfoEventArgs> ReadXmlFileAsync(Uri xmlUri)
{
_xmlUri = xmlUri;
HttpClient _httpClient = new HttpClient {
Timeout = TimeSpan.FromDays(1)
};
string xmlString = await GetXmlString(_httpClient);
XmlSerializer xmlSerializer = new XmlSerializer(typeof(UpdateInfoEventArgs));
XmlTextReader xmlTextReader = new XmlTextReader(new StringReader(xmlString))
{
XmlResolver = null
};
_updateInfo = (UpdateInfoEventArgs)xmlSerializer.Deserialize(xmlTextReader);
Dispose(_httpClient);
if (string.IsNullOrEmpty(_updateInfo.CurrentVersion) || string.IsNullOrEmpty(_updateInfo.DownloadURL))
{
throw new MissingFieldException();
}
return(_updateInfo);
}
public async Task <UpdateInfoEventArgs> ReadXmlFileAsync(Uri xmlUri)
{
byte[] result;
using (FileStream SourceStream = File.Open(xmlUri.LocalPath, FileMode.Open))
{
result = new byte[SourceStream.Length];
await SourceStream.ReadAsync(result, 0, (int)SourceStream.Length);
}
string xmlString = System.Text.Encoding.UTF8.GetString(result);
XmlSerializer xmlSerializer = new XmlSerializer(typeof(UpdateInfoEventArgs));
XmlTextReader xmlTextReader = new XmlTextReader(new StringReader(xmlString))
{
XmlResolver = null
};
_updateInfo = (UpdateInfoEventArgs)xmlSerializer.Deserialize(xmlTextReader);
if (string.IsNullOrEmpty(_updateInfo.CurrentVersion) || string.IsNullOrEmpty(_updateInfo.DownloadURL))
{
throw new MissingFieldException();
}
return(_updateInfo);
}