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DATEDIFF(day, 字段1, 字段2)
DateTime dt1 = new DateTime(2012, 2, 22);
DateTime dt2 = new DateTime(2012, 10, 29);
TimeSpan ts = dt2 - dt1;
int days = ts.Days;
DateTime dt1 = new DateTime(2012, 2, 22);
DateTime dt2 = new DateTime(2012, 10, 29);
TimeSpan ts = dt2 - dt1;
int days = ts.Days;
private string DateDiff(DateTime DateTime1, DateTime DateTime2)
{string dateDiff = null;
TimeSpan ts1 = new TimeSpan(DateTime1.Ticks);
TimeSpan ts2 = new TimeSpan(DateTime2.Ticks);
TimeSpan ts = ts1.Subtract(ts2).Duration();
dateDiff = ts.Days.ToString()+"天"+ ts.Hours.ToString()+"小时"+ ts.Minutes.ToString()+"分钟"+ ts.Seconds.ToString()+"秒";
return dateDiff;
}