Data type mismatch in criteria expression | Access, OleDb, C#

Question

I read/update data from MS Access using C#. My code is:

public static void UpdateLastLogin(int userid, DateTime logintime) ///logintime = DateTime.Now
{
             


        

Answer 1

Should it not be

"UPDATE Customers SET LastLogin='@LastLogin'"

And @LastLogin should be

logintime.ToString("yyyy-MM-dd hh:mm:ss")

edit Could you not just inline the whole thing?

"UPDATE Customers SET LastLogin='" + logintime.ToString("yyyy-MM-dd hh:mm:ss") + "'"