vb.net日期算星期 vb輸入日期計算天數(shù)

vb.net中怎么根據(jù)日期算出是周幾呢？

Public?Function?IsRunnian(ByVal?n?As?Integer)?As?Boolean

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Dim?res?As?Boolean

res?=?False

If?n?Mod?400?=?0?Then

res?=?True

End?If

If?(n?Mod?100??0)?And?(n?Mod?4?=?0)?Then

res?=?True

End?If

IsRunnian?=?res

End?Function

Public?Function?Fc(ByVal?td?As?Date)?As?Byte

Dim?y?As?Integer

Dim?m?As?Integer

Dim?d?As?Integer

Dim?yc?As?Integer

Dim?mc?As?Integer

Dim?dc?As?Integer

y?=?Year(td)

m?=?Month(td)

d?=?Day(td)

dc?=?d

If?IsRunnian(y)?Then

mc?=?Val(Mid("512503514624",?m,?1))

Else

mc?=?Val(Mid("622503514624",?m,?1))

End?If

yc?=?((y?Mod?100)?\?4?+?(y?Mod?100))?Mod?7

Fc?=?(yc?+?mc?+?dc)?Mod?7

End?Function

vb.net中如何獲取當前日期所在星期的星期一的具體年月日

Dim ThisDay As String = Format(Now, "yyyy-MM-dd") '獲得當前日期字符串

Dim ThisDateTime As DateTime = Convert.ToDateTime(ThisDay) '當前日期轉(zhuǎn)換成DateTime

Dim ThisWeekDay As Integer = ThisDateTime.DayOfWeek '獲得當前日期是星期幾

Dim differadd As Integer = 1 - ThisWeekDay '相差的天數(shù)（星期1與當前星期幾相差的天數(shù)）

Dim MyAdd As New TimeSpan(differadd, 0, 0, 0)

Dim MyYear As Integer = Format(Now, "yyyy") '獲取當前日期的年份

Dim MyMonth As Integer = Format(Now, "MM") '獲取當前日期的月份

Dim MyDay As Integer = Format(Now, "dd") '獲取當前日期是幾號

Dim MyToday As DateTime = New DateTime(MyYear, MyMonth, MyDay)

Dim Yourday As DateTime = MyToday.Add(MyAdd)

MsgBox("本周星期一的日期是：" Yourday)

vb.net中如何獲取當前日期所在星期的星期一

1

string[] Day = new string[] { "星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六" };

string week = Day[Convert.ToInt32(DateTime.Now.DayOfWeek.ToString("d"))].ToString();

this.lbDay.Text = week;

2

this.lbDay.Text = System.Globalization.CultureInfo.CurrentCulture.DateTimeFormat.GetDayName(DateTime.Now.DayOfWeek);

分享標題：vb.net日期算星期 vb輸入日期計算天數(shù)
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