Asp.net time comparison

Generally, the time comparison is performed on the database end, but the time comparison is required on the Net Platform in recent development. There are two cases that should be more common. Now I will handle the correspondingCodePost as follows:

1. Validity of the date segment

For example, if "valid before-8-10 days", some operation can be performed in the past.

Datetime. Now. compareto (convert. todatetime ("2007-8-10 "))

Determine whether the return value is greater than 0. Note that system. argumentexception is caused by a parameter other than system. datetime ;)

2. Validity Period

For example, "valid from 8: 00 to 22 every day"

If (datetime. Now. Hour <8) | (datetime. Now. Hour> 22) {// invalid}