C#常用日期时间方法汇总
作者：農碼一生
这篇文章介绍了C#常用的日期时间方法，文中通过示例代码介绍的非常详细。对大家的学习或工作具有一定的参考借鉴价值，需要的朋友可以参考下
一、月份英文简写
DateTime dt = DateTime.Now;
string MM = dt.AddMonths(-1).ToString("MMM", new System.Globalization.CultureInfo("en-us"));//月英文缩写：Jul二、当月第一天和最后一天
DateTime ThisMonth_Frist = DateTime.Now.AddDays(1 - DateTime.Now.Day).Date; DateTime ThisMOnth_Last = DateTime.Now.AddDays(1 - DateTime.Now.Day).Date.AddMonths(1).AddSeconds(-1);
三、上月第一天和最后一天
DateTime Today = DateTime.Today;//当天时间 DateTime ThisMonth = new DateTime(Today.Year, Today.Month, 1);//当前月第一天时间 DateTime LastMonth_First = ThisMonth.AddMonths(-1);//上月第一天时间 DateTime LastMonth_Last = ThisMonth.AddDays(-1);//上月最后一天时间
四、本周第几天
int daysInWeek1 = (int)DateTime.Now.DayOfWeek;//注意：此处周,日时返回0， int daysInWeek2 = (int)DateTime.Now.DayOfWeek == 0 ? 7 : (int)DateTime.Now.DayOfWeek;//当前周第几天,注释:周日为0
五、本月第几周
int a = WeekOfMonth(DateTime.Now, false);//
六、本年第几周
private int WeekOfYear()
{
var dt = DateTime.Now;
int firstWeekend = Convert.ToInt32(DateTime.Parse(dt.Year + "-1-1").DayOfWeek);
int weekDay = firstWeekend == 0 ? 1 : (7 - firstWeekend + 1);
int currentDay = dt.DayOfYear;
int current_week = Convert.ToInt32(Math.Ceiling((currentDay - weekDay) / 7.0)) + 1;
return current_week;
}七、前几周的周一和周日
private void FEDayInLastWeek()
{
int N = 3;//前几周参数
DateTime Today = DateTime.Now;
int daysInWeek = (int)Today.DayOfWeek == 0 ? 7 : (int)Today.DayOfWeek;//当前周第几天,注释:周日为0
for (int i = N; i > 0; i--)
{
//起始日期
DateTime firstDay = Today.AddDays(1 - (7 * i + daysInWeek));
DateTime lastDay = Today.AddDays(7 - (7 * i + daysInWeek));
}
}八、本周一和当前日
private void FristDayToNowInThisWeek()
{
int daysInWeek = (int)DateTime.Now.DayOfWeek == 0 ? 7 : (int)DateTime.Now.DayOfWeek;//当前周第几天,注释:周日为0
//起始日期
DateTime firstDay = DateTime.Now.AddDays(1 - daysInWeek);
DateTime lastDay = DateTime.Now;
}C#中控件绑定时间栏位格式化
Bind("查询出的栏位", "{0:yyyy/MM/dd}")到此这篇关于C#常用日期时间方法的文章就介绍到这了。希望对大家的学习有所帮助，也希望大家多多支持脚本之家。