/// <summary>
/// Initialises a new instance of the <see cref="UpdateInformationDialog"/> class.
/// </summary>
/// <param name="update">The update to show information about.</param>
public UpdateInformationDialog(ProgramUpdate update)
{
this.InitializeComponent();
this.client = new WebClient();
this.client.DownloadProgressChanged += new DownloadProgressChangedEventHandler(this.Client_DownloadProgressChanged);
this.client.DownloadFileCompleted += new AsyncCompletedEventHandler(this.Client_DownloadFileCompleted);
this.update = update;
this.update.ReleaseNotes.ForEach(notes =>
{
string section = string.Format(
"-- Version {0}, Released {1} --\r\n{2}\r\n\r\n",
notes.Version,
notes.Date,
notes.Summary.Replace("\n", Environment.NewLine));
this.summaryTextBox.Text += section;
});
this.Localise();
}
/// <summary>
/// Handles the DoWork event of System.ComponentModel.BackgroundWorker.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The event arguments.</param>
private void UpdateCheckBackgroundWorker_DoWork(object sender, DoWorkEventArgs e)
{
ProgramUpdate update = new ProgramUpdate();
if (update.Fetch())
{
Version executingVersion = Assembly.GetExecutingAssembly().GetName().Version;
Version updateVersion = new Version(update.Version);
if (executingVersion < updateVersion)
{
update.FetchReleaseNotes(executingVersion);
e.Result = update;
}
else
{
e.Result = null;
}
}
else
{
e.Result = false;
}
}
/// <summary>
/// Validates the integrity of an update file.
/// </summary>
/// <param name="fileName">The full path of the local file to validate.</param>
/// <param name="update">The upgrade the file is associated with.</param>
/// <returns>true if the hashes match, false if not.</returns>
private bool ValidateUpgradeFile(string fileName, ProgramUpdate update)
{
bool retval = false;
if (File.Exists(fileName))
{
SHA1Managed sha1 = new SHA1Managed();
StringBuilder sb = new StringBuilder(41);
byte[] data = File.ReadAllBytes(fileName);
byte[] hash = sha1.ComputeHash(data);
for (int i = 0; i < hash.Length; i++)
{
sb.Append(hash[i].ToString("X2"));
}
retval = sb.ToString().Equals(update.Hash, StringComparison.OrdinalIgnoreCase);
}
return retval;
}
