如何用vb.net添加年份

先取當前年份 再算出和原始年份的差 然后來個循環(huán)寫出這幾個年份

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vb.net 如何獲取時間？

兩種方式自己選用

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

Dim s As String

s = DateTime.Today.Year()

s = s DateTime.Today.Month()

s = s DateTime.Today.Day()

s = s DateTime.Now.Hour()

s = s DateTime.Now.Minute()

s = s DateTime.Now.Second()

MsgBox(s, vbDefaultButton1, Now())

End Sub

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click

Dim s As String

s = Format(Now(), "yyyymmddhhmmss")

MsgBox(s, vbYes, Now())

End Sub

vb.net獲取年，月，日，時，分，秒

不是 有 函數(shù)嘛？

now() 就是 吧

取得 后 再 分離出你所需的，分別賦值 就行了，當然 還是 有 函數(shù)的

vb.net中怎么獲取日期中的年月日時分秒

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)

在vb.net中，如何計算出2000-2100年之間的閏年？輸出到文本框，并統(tǒng)計輸出閏年的個數(shù)？主要是統(tǒng)計個數(shù)

這樣：

Private?Sub?Button1_Click(sender?As?Object,?e?As?EventArgs)?Handles?Button1.Click

Dim?leapyears()?As?Integer?=?GetLeapYears(2000,?2100)

Dim?str?As?String

Try

Dim?count?As?Integer?=?UBound(leapyears)?+?1

str?=?"閏年個數(shù):"?+?count.ToString

For?i?=?0?To?UBound(leapyears)

str?+=?"?"?+?leapyears(i).ToString

Next

TextBox1.Text?=?str

Catch?ex?As?Exception?

End?Try

End?Sub

'''?summary

'''?獲取指定年份區(qū)間中所有閏年組成的數(shù)組

'''?/summary

'''?param?name="StartYear"起始年份/param

'''?param?name="EndYear"結(jié)束年份/param

'''?returns/returns

'''?remarks/remarks

Private?Function?GetLeapYears(StartYear?As?Integer,?EndYear?As?Integer)?As?Integer()

Dim?leapyears()?As?Integer?=?Nothing

Dim?index?As?Integer?=?0

For?i?=?StartYear?To?EndYear

If?(i?Mod?400?=?0)?Or?(i?Mod?4?=?0?And?i?Mod?100??0)?Then

ReDim?Preserve?leapyears(index)

leapyears(index)?=?i

index?+=?1

End?If

Next

Return?leapyears

End?Function

擴展資料：

注意事項

DateSerial返回包含指定的年、月、日的 Variant (Date)。

語法：DateSerial(year, month, day)

Private Function MonthToLeapYear(ByVal Yea As Integer) As Boolean

MonthToLeapYear = Day(DateSerial(Yea, 2, 29)) = 29

End Function

Private Sub Command1_Click()

If Len(Text1.Text) = 4 Then

? If MonthToLeapYear(Text1.Text) = True Then

? ? ? Print Text1.Text "年是閏年"

? Else

? ? ? Print Text1.Text "年是平年"

? End If

Else

?Print "錯誤：請輸入正確的年份！"

End If

End Sub

在VB.NET中進行日期處理時，避免手工判斷或計算是個好主意，因為手工計算由于代碼的質(zhì)量問題可能不準確?？梢允褂?NET提供的類的功能進行日期處理。

例如，如果需要判斷給定的某年是否閏年，可以使用VB.NET的IsLeapYear函數(shù)。下面是如何使用該函數(shù)的一個例子：

Private Sub LeapYearCheck()

Dim bLeapYear AsBoolean

bLeapYear = Date.IsLeapYear(Now.Year)

MessageBox.Show(bLeapYear)

bLeapYear = Date.IsLeapYear(2004)

MessageBox.Show(bLeapYear)

End Sub

VB.NET 根據(jù)年月日判斷是否為閏年或者平年！

VB.NET 判斷是否為閏年或者平年！

Public Class Form1

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

閏年平年(TextBox1.Text)

End Sub

Function 閏年平年(ByVal MyString As String) As String

Dim MyDate As DateTime = Convert.ToDateTime(MyString)

Dim MyInfo As String = MyDate.Year.ToString() + "年是："

If (DateTime.IsLeapYear(MyDate.Year) = True) Then

MyInfo += "閏年。"

Else

MyInfo += "平年。"

End If

MessageBox.Show(MyInfo, "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information)

Return 1

End Function

End Class