public async Task EnsureAvailableAsync() {
Version CurrentVersion = null;
try {
// Test query.
CurrentVersion = await Task.Run(() => VersionAccess.GetVersionInfo());
} catch {
}
if (CurrentVersion == null) {
// Check if database exists. If it doesn't, create blank database.
if (!File.Exists(Settings.DatabasePath) || new FileInfo(Settings.DatabasePath).Length == 0)
await CreateNewDatabaseAsync();
await TryUntilTimeout(() => VersionAccess.GetVersionInfo(), 10000);
}
// If database connection is successfull, ensure database file is up to date.
await UpdateDatabaseAsync();
}
private async Task TestDatabaseConnectionAsync() {
// Test connection to database.
DatabaseHandler db = new DatabaseHandler();
try {
await db.EnsureAvailableAsync();
}
catch (Exception ex) {
string ErrorMessage = "Cannot connect to database.\r\n" + ex.Message;
MessageBox.Show(Main, ErrorMessage, "Natural Grounding Player");
App.Current.Shutdown();
}
}
