C＃データベースにデータを挿入できません

Question

このコードがデータベースに何も挿入していない理由を教えてください。私はいくつかの問題がある、私は新しいです。代わりにColumnName1の

private void reserveButton() 
    { 
     string query = "INSERT INTO Rezervari VALUES (@nume, @rand, @coloana, @data, @film, @tipBilet)"; 

     using (connection = new SqlConnection(connectionString)) 
     using (SqlCommand command = new SqlCommand(query, connection)) 
     using (SqlDataAdapter adapter = new SqlDataAdapter(command)) 
     { 
      connection.Open(); 
      command.Parameters.AddWithValue("@nume", textBox1.Text); 
      command.Parameters.AddWithValue("@rand", comboBox1.SelectedValue); 
      command.Parameters.AddWithValue("@coloana", comboBox2.SelectedValue); 
      command.Parameters.AddWithValue("@data", listBox2.SelectedValue); 
      command.Parameters.AddWithValue("@film", listBox1.SelectedValue); 
      command.Parameters.AddWithValue("@tipBilet", listBox4.SelectedValue); 
      command.ExecuteNonQuery(); 
     } 

     MessageBox.Show("Ticket Reserved. See you at the movies!"); 
    } 

Answer 1

string query = "INSERT INTO Rezervari (ColumnName1,ColumnName2) 
           VALUES (@ColumnName1,@ColumnName2)";   
    var connection = new SqlConnection(connectionString); 
    var command = new SqlCommand(query, connection); 
    connection.Open(); 
    command.Parameters.AddWithValue("@ColumnName1", "aaaa"); 
    command.Parameters.AddWithValue("@ColumnName2", "bbbb"); 
    command.ExecuteNonQuery(); 
    con.Close(); 
    }