public Task<bool> DownloadUpdate(VersionInfo versionInfo, string savePath)
{
return Task.Factory.StartNew(() =>
{
// Store to a temp file while downloading
string tempPath = Path.Combine(Paths.Temp, Path.GetRandomFileName());
urlFileDownloader.DownloadFile(versionInfo.DownloadUrl, tempPath);
// Handle the somewhat tricky situation where the file to save to already exists
if (File.Exists(savePath))
{
// Try overwriting the file, which should work if it isn't locked by another process
try
{
File.Delete(savePath);
}
catch (IOException)
{
File.Delete(tempPath);
return false;
}
}
// Now that the download is complete, rename/move the temp file
File.Move(tempPath, savePath);
return true;
});
}
public void PerformUpdate(IAutoUpdaterClient client, VersionInfo versionInfo)
{
switch (formFactory.Create<FUpdate>().ShowDialog())
{
case DialogResult.Yes: // Install
// TODO: The app process might need to be killed/restarted before/after installing
autoUpdater.DownloadAndInstallUpdate(versionInfo).ContinueWith(result =>
{
if (result.Result)
{
client.InstallComplete();
}
else
{
MessageBox.Show(MiscResources.InstallFailed, MiscResources.InstallFailedTitle,
MessageBoxButtons.OK, MessageBoxIcon.Error);
}
});
break;
case DialogResult.OK: // Download
var saveDialog = new SaveFileDialog
{
FileName = versionInfo.FileName
};
if (saveDialog.ShowDialog() == DialogResult.OK)
{
// TODO: Display progress while downloading
autoUpdater.DownloadUpdate(versionInfo, saveDialog.FileName);
}
break;
}
}
public Task<bool> DownloadAndInstallUpdate(VersionInfo versionInfo)
{
return Task.Factory.StartNew(() =>
{
var saveFolder = Path.Combine(Paths.Temp, Path.GetRandomFileName());
var savePath = Path.Combine(saveFolder, versionInfo.FileName);
Directory.CreateDirectory(saveFolder);
try
{
if (!DownloadUpdate(versionInfo, savePath).Result)
{
return false;
}
if (!InstallUpdate(savePath, versionInfo.InstallArguments).Result)
{
return false;
}
return true;
}
finally
{
Directory.Delete(saveFolder, true);
}
});
}
public void UpdateAvailable(VersionInfo versionInfo)
{
Invoke(() => autoUpdaterUI.PerformUpdate(this, versionInfo));
}
