如何获得本周开始的日期时间? [英] How can I get the DateTime for the start of the week?

问题描述

如何在 C# 中只知道当前时间，找到一周的开始(周日和周一)?

How do I find the start of the week (both Sunday and Monday) knowing just the current time in C#?

类似于:

DateTime.Now.StartWeek(Monday);

推荐答案

使用扩展方法.他们是一切的答案，你知道！;)

Use an extension method. They're the answer to everything, you know! ;)

public static class DateTimeExtensions
{
    public static DateTime StartOfWeek(this DateTime dt, DayOfWeek startOfWeek)
    {
        int diff = (7 + (dt.DayOfWeek - startOfWeek)) % 7;
        return dt.AddDays(-1 * diff).Date;
    }
}

可以如下使用:

DateTime dt = DateTime.Now.StartOfWeek(DayOfWeek.Monday);
DateTime dt = DateTime.Now.StartOfWeek(DayOfWeek.Sunday);

这篇关于如何获得本周开始的日期时间?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！