The database retrieving multiple rows for a select query. How to display each rows in a textbox one by one when pressing down arrow key?

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C#

SQL

select * from receptiondatabase where personid='k78930'// Passport no
The person visited multilple times in a day. Hence the database giving multiple rows.

The language is C#
I have a textbox to type the passport number. The data is retrieving using sqldatareader which is showing in the other text boxes (name, purpose of visit) only for one row.
How to show the other transactions in textboxes when pressing down arrow key?

What I have tried:

if (reader.HasRows)
{
while (reader.Read())
{
txtname.Text = reader["per_name"].ToString();
txtpurpose.Text = reader["Purpose"].ToString()
}
}