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After I created SQLite database on button click with code like this:

private void button_Click(object sender, RoutedEventArgs e)
 
 SQLiteConnection sqlite_conn;
 SQLiteCommand sqlite_cmd;
 SQLiteDataReader sqlite_datareader;

 // create a new database connection:
 sqlite_conn = new SQLiteConnection("Data Source=database.db;Version=3;New=True;Compress=True;");

 // open the connection:
 sqlite_conn.Open();

 // create a new SQL command:
 sqlite_cmd = sqlite_conn.CreateCommand();

 // Let the SQLiteCommand object know our SQL-Query:
 sqlite_cmd.CommandText = "CREATE TABLE airports (id integer primary key , airportName varchar(100) not null, airportCity varchar(45) not null, active tinyint(1));";

 // Now lets execute the SQL ;D
 sqlite_cmd.ExecuteNonQuery();

 // Lets insert something into our new table:
 sqlite_cmd.CommandText = "INSERT INTO airports (id, airportName, airportCity, active) VALUES (1, 'TestAirport1', 'TestCity1', 1);";

 // And execute this again ;D
 sqlite_cmd.ExecuteNonQuery();

 // ...and inserting another line:
 sqlite_cmd.CommandText = "INSERT INTO airports (id, airportName, airportCity, active) VALUES (2, 'TestAirport2', 'TestCity2', 1);";

 // And execute this again ;D
 sqlite_cmd.ExecuteNonQuery();

 // But how do we read something out of our table ?
 // First lets build a SQL-Query again:
 sqlite_cmd.CommandText = "SELECT * FROM airports";

 // Now the SQLiteCommand object can give us a DataReader-Object:
 sqlite_datareader = sqlite_cmd.ExecuteReader();

 // The SQLiteDataReader allows us to run through the result lines:
 while (sqlite_datareader.Read()) // Read() returns true if there is still a result line to read
 
 // Print out the content of the text field:
 //System.Console.WriteLine(sqlite_datareader["text"]);
 

 // We are ready, now lets cleanup and close our connection:
 sqlite_conn.Close();
 

Everything is fine, database created, table created and some data inserted to table. (I check all with SQLite Manager on MozzilaFirefox)

My goal is to fill DataGrid on button click with data from database like this:

private void btnShow_Click(object sender, RoutedEventArgs e)
 

 string database_connection = "Data Source=database.db;Version=3;New=True;";
 string query = String.Format("SELECT * FROM airports WHERE active = '1'");

 SQLiteConnection connection = new SQLiteConnection(database_connection);
 connection.Open();

 SQLiteCommand command = new SQLiteCommand(query, connection);
 SQLiteDataAdapter dataAdapter = new SQLiteDataAdapter(command);

 DataTable data = new DataTable();
 dataAdapter.Fill(data);
 dgAirports.DataContext = data;

 

But then visual studio throw exception that table 'airports' doesen't exist and for real, the whole database become empty.

How to fix that?