Combine date and time when date is a DateTime and time is a string

Question

I am working with an old mysql database in which a date is stored (without a time) as a datetime and a time is stored as a string (without a date).

In C# I then have a D

Answer 1

I used something similar to what simendsjo says, except I continued to have it as a DateTime

DateTime date = Convert.ToDateTime(txtTrainDate.Text);
DateTime time = Convert.ToDateTime(ddTrainTime.SelectedValue);
DateTime dtCOMPLTDTTM = new DateTime(date.Year, date.Month, date.Day, time.Hour, time.Minute, time.Second);