c# util方法

//1.c# 计算两个日期的天数 

private int DateDiff(DateTime dateStart, DateTime dateEnd)
{
　　DateTime start = Convert.ToDateTime(dateStart.ToShortDateString());
　　DateTime end = Convert.ToDateTime(dateEnd.ToShortDateString());
　　TimeSpan sp = end.Subtract(start);
　　return sp.Days;
}

　　

 

//2.