private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            textBox_path.Text = AppDomain.CurrentDomain.BaseDirectory + @"test.xls";

            pintu(textBox_path.Text);

            try
            {
                con.Open();
                str = "select * from [abc$]";
                com = new OleDbCommand(str, con);
                oledbda = new OleDbDataAdapter(com);
                MessageBox.Show(str);
                ds = new DataSet();
                oledbda.Fill(ds, "[abc$]");
                con.Close();

                dt = ds.Tables["[abc$]"];
                int i = 0;
                for (i = 0; i <= dt.Rows.Count - 1; i++)
                {
                    comboBox_Street.Items.Add(dt.Rows[i].ItemArray[0]);
                }
            }