Question

我的矛盾或者很简单的问题是从今天开始，以DD-MM-YY格式创建一个日期列表。假设我们今天有“11/04/2015”好吗？我有兴趣创建一个日期时间列表，该列表从2015年11月2日星期一到2015年11月8日星期日开始。这怎么可能？我最初想的是：

DateTime today = new DateTime.Now;

int posDayOfWeek = (int)today.DayOfWeek;

if (posDayOfWeek < 7 && posDayOfWeek > 1)
{
    // And from there a black hole in my brain ....
}

我真的不知道怎么做....

谢谢亲切 Cristian Capannini

Answer 1

假设你总是想要周一到周日，你只需要：

DateTime today = DateTime.Today;
int currentDayOfWeek = (int) today.DayOfWeek;
DateTime sunday = today.AddDays(-currentDayOfWeek);
DateTime monday = sunday.AddDays(1);
// If we started on Sunday, we should actually have gone *back*
// 6 days instead of forward 1...
if (currentDayOfWeek == 0)
{
    monday = monday.AddDays(-7);
}
var dates = Enumerable.Range(0, 7).Select(days => monday.AddDays(days)).ToList();

Answer 2

请使用：

DayOfWeek[] days = { 
    DayOfWeek.Sunday, 
    DayOfWeek.Monday, 
    DayOfWeek.Tuesday, 
    DayOfWeek.Wednesday, 
    DayOfWeek.Thursday, 
    DayOfWeek.Friday, 
    DayOfWeek.Saturday };

很简单。很清楚。而且我已经为你输入了它。

Answer 3

在网上搜索类似内容时，我找到了这个问题/答案主题并进行了扩展，以便根据从昨天开始的星期几创建排序顺序：

//create a sort order that starts yesterday
DateTime orderStartDate = DateTime.Today.AddDays(-1);
List<int> sortOrder = Enumerable.Range(0,7).Select(days => (int)orderStartDate.AddDays(days).DayOfWeek).ToList();

//sort collection using the index of the sortOrder
collection.AddRange(list.OrderBy(list  => sortOrder.FindIndex(days => day == list.TargetDay)));

从DateTime.Now获取当前周的日期列表

3 个答案: