vb.net里的日期 vb顯示年月日代碼

vb.net中如何獲取當(dāng)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(dāng)前日期字符串

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

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

Dim differadd As Integer = 1 - ThisWeekDay '相差的天數(shù)(星期1與當(dāng)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(dāng)前日期的年份

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

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

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中怎么獲取日期中的年月日時(shí)分秒

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

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

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

Dim differadd As Integer = 1 - ThisWeekDay '相差的天數(shù)(星期1與當(dāng)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(dāng)前日期的年份

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

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

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 查詢 日期

dim 現(xiàn)在的時(shí)間 as date = Now

"Select * From 表 Where 開始的時(shí)間= # " 現(xiàn)在的時(shí)間 "# And 結(jié)束的時(shí)間= # " 現(xiàn)在的時(shí)間 " # "

vb.net中日期類型怎么從字符串轉(zhuǎn)換

Dim a As String

Dim b As Date

a = "2016-11-18"

b = CDate(a)

本例中最主要的就是CDate()函數(shù),這個(gè)函數(shù)是用于把字符型變量轉(zhuǎn)換成日期型變量,

字符型變量(本例中的a)如果不是標(biāo)準(zhǔn)的日期格式,請(qǐng)先用字符串函數(shù)處理成標(biāo)準(zhǔn)日期格式再用CDate函數(shù)進(jìn)行轉(zhuǎn)換,否則會(huì)報(bào)錯(cuò)

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