如何使用 vb.net/C# 获取自定义格式的星期名称

Question

使用以下代码获取计算机的当前日名称

Dim CompCurrCult = Globalization.CultureInfo.CurrentCulture
Dim dayOfWeek As DayOfWeek = CompCurrCult .Calendar.GetDayOfWeek(Date.Today)

结果：dayofWeek = Monday

所以我的问题是如何得到像 MON 这样的结果而不是 Monday

Answer 1

使用子串函数

Dim DayName As String = UCase(dayOfWeek.ToString.Substring(0, 3))

Answer 2

Calendar.GetDayOfWeek method returns full day name of a DateTime which provided as a parameter and it's based on DayOfWeek枚举。

您可以使用 "ddd" format specifier 获取当天的缩写名称。对于 C#；

DateTime.Today.ToString("ddd", CultureInfo.InvariantCulture); //Mon

如果你想得到它作为MON，只需调用.ToUpper() method like;

DateTime.Today.ToString("ddd", CultureInfo.InvariantCulture).ToUpper(); // MON

How get Week day name in custom format using vb.net/C#