vb.net得到年的简单介绍
如何用vb.net添加年份
先取当前年份 再算出和原始年份的差 然后来个循环写出这几个年份
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vb.net 如何获取时间？
两种方式自己选用
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获取年，月，日，时，分，秒
不是 有 函数嘛？
now() 就是 吧
取得 后 再 分离出你所需的，分别赋值 就行了，当然 还是 有 函数的
vb.net中怎么获取日期中的年月日时分秒
Dim ThisDay As String = Format(Now, "yyyy-MM-dd") '获得当前日期字符串
Dim ThisDateTime As DateTime = Convert.ToDateTime(ThisDay) '当前日期转换成DateTime
Dim ThisWeekDay As Integer = ThisDateTime.DayOfWeek '获得当前日期是星期几
Dim differadd As Integer = 1 - ThisWeekDay '相差的天数（星期1与当前星期几相差的天数）
Dim MyAdd As New TimeSpan(differadd, 0, 0, 0)
Dim MyYear As Integer = Format(Now, "yyyy") '获取当前日期的年份
Dim MyMonth As Integer = Format(Now, "MM") '获取当前日期的月份
Dim MyDay As Integer = Format(Now, "dd") '获取当前日期是几号
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，如何计算出2000-2100年之间的闰年？输出到文本框，并统计输出闰年的个数？主要是统计个数
这样：
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 = "闰年个数:" + 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
''' 获取指定年份区间中所有闰年组成的数组
''' /summary
''' param name="StartYear"起始年份/param
''' param name="EndYear"结束年份/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
扩展资料：
注意事项
DateSerial返回包含指定的年、月、日的 Variant (Date)。
语法：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 "年是闰年"
Else
Print Text1.Text "年是平年"
End If
Else
Print "错误：请输入正确的年份！"
End If
End Sub
在VB.NET中进行日期处理时，避免手工判断或计算是个好主意，因为手工计算由于代码的质量问题可能不准确。可以使用.NET提供的类的功能进行日期处理。
例如，如果需要判断给定的某年是否闰年，可以使用VB.NET的IsLeapYear函数。下面是如何使用该函数的一个例子：
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 根据年月日判断是否为闰年或者平年！
VB.NET 判断是否为闰年或者平年！
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
闰年平年(TextBox1.Text)
End Sub
Function 闰年平年(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 += "闰年。"
Else
MyInfo += "平年。"
End If
MessageBox.Show(MyInfo, "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information)
Return 1
End Function
End Class
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