丫烈客

public static void Test()

{   

    DateTime date =new DateTime(2011,1,1,12,30,10);

    DateTime date1 = date.AddDays(1).AddSeconds(-1);   

    //有沒有加DATE差很多,這樣才是正解

    DateTime date2 = date.Date.AddDays(1).AddSeconds(-1);

     Console.WriteLine("date1={0}",date1);

     Console.WriteLine("date2={0}",date2);

}

Prepare to run...

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date1=2011/1/2 下午 12:30:09

date2=2011/1/1 下午 11:59:59

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public static void Test()

{

    DateTime endDate = new DateTime(2011,1,1,23,59,59);

    DateTime startDate= new DateTime(2011,1,1);

    TimeSpan ts = endDate- startDate;

    //TotalDays 是double 是會有小數的要小心

    Console.WriteLine("TotalDays=" + ts.TotalDays);

    //Days 是int ,如果只是單純計算天數差別,用Days是正解

    Console.WriteLine("Days=" + ts.Days);

}

Result:

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TotalDays=0.999988425925926

Days=0

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