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c#初学者问题

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c#初学者问题

发表于：2007-02-20 19:22:07 楼主

private int compare_click（object sender, system.eventargs e)
{
int diff = datecompare（first.value, second.value);
info.text = " ";
show（ "first == second ", diff == 0);
show（ "first != second ", diff != 0);
show（ "first < second ", diff < 0);
show（ "first <= second ", diff <= 0);
show（ "first > second ", diff > 0);
show（ "first > = second ", diff > = 0);
}

在datecompare方法主体中输入以下语句：
private int datecompare（datetime lefthandside, datetime righthandside)

int result;
if （lefthandside.year < righthandside.year)
　result = -1;
else if （lefthandside.year > righthandside.year)
　result = +1;
else if （lefthandside.month < righthandside.month)
　result = -1;
else if （lefthandside.month > righthandside.month)
　result = +1;
else if （lefthandside.day < righthandside.day)
　result = -1;
else if （lefthandside.day > righthandside.day)
　result = +1;
else
　result = 0;
　return result;
问题:first.value是属性吗?这个实参在传入datetime lefthandside,中的lefthandside,这个变量为什么能接收好多种种类,如day,month的值呀,这种值为什么能相互转换而被接收啊,是不是隐藏一些什么要的东西啊,是不是自动转换呀,这属于什么物性啊,

发表于：2007-02-20 21:06:581楼得分:0

日期，.net 里面，直接可以加减，得到另一个 timespan 对象

发表于：2007-02-21 18:50:592楼得分:0

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