DateTime dt = DateTime.Now;
while (...){
...
comm.Parameters["@riqi"].Value=dt.ToShortDateString(); //not dt??
dt = dt.AddDays(-1);
...}
while (...){
...
comm.Parameters["@riqi"].Value=dt.ToShortDateString(); //not dt??
dt = dt.AddDays(-1);
...}
Subtract是不是也可以?秒咋办?