You can do a check with the variable like
if(fecha.HasValue)
{
//do required
}
else
{
//set a default date time
fecha=DateTime.MinValue
}
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.