How I can display selected value from combobox in datagrid view using c#

            SqlCommand command = new SqlCommand();
            SqlDataAdapter da = new SqlDataAdapter();
            DataTable dt = new DataTable();
            
            //command.Connection = connection;
            command.CommandText = @"
SELECT  a.Name,
        a.Log_No
FROM    Table   a
WHERE   a.Country = :country";
            command.Parameters.AddWithValue("country", cmbCountry.Text);
            da.SelectCommand = command;
            da.Fill(dt);
            command.Dispose();
            dataGridView1.DataSource = dt;