问题描述
hai朋友
我对C#中的datetimepicker工具有疑问.
1.
我必须使用一个datetimepicker显示选定日期的剩余天数.
例如今天是2011年4月22日.剩余的日期直到2012年3月31日.
如果是一月，二月和三月，则应显示当年的日期
例如，截至2011年3月31日的剩余天数为2011年3月31日.
2.
使用c#中的datetimepicker工具显示当月的日期.
例如.如果我选择一月，则文本框应告诉days = 31
hai friends
i have a doubt in datetimepicker tool in c#.
1.
I have to display remaining days in a selected date use only one datetimepicker.
for eg today date is 22-apr-2011. remaining days upto 31-mar-2012.
if it is jan, feb and mar it should display the days of current year
for eg 12-jan-2011 remaining days upto 31-mar-2011.
2.
Display the days of current month using datetimepicker tool in c#.
eg. if i am selecting jan month, the textbox should tells days = 31
推荐答案
DateTime start = DateTime.Now;
DateTime end = DateTime.Now.AddDays(25);
TimeSpan span = end - start;
int totalDays = span.TotalDays;
关于问题2.
看看 DateTime.DaysInMonth [ ^ ]
输入年份和月份，它将返回该年份和月份的总天数.
About question 2.
Take a look at DateTime.DaysInMonth[^]
You give it year and month and it will return total days in that year and month.
int daysToGo;
if(yourDateTimePicker.Value.Month > 3){
daysToGo = (new DateTime(yourDateTimePicker.Value.Year + 1,3,31) - yourDateTimePicker.Value).Days;
}
else{
daysToGo = (new DateTime(yourDateTimePicker.Value.Year,3,31) - yourDateTimePicker.Value).Days;
}
2.这应该有帮助:
2. This should help:
yourTextBox.Text = DateTime.DaysInMonth(yourDateTimePicker.Value.Year, yourDateTimePicker.Value.Month).ToString();
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