VB.net窗體程序的time控件，可以識別到的最小時間差是多少納秒 ?

VB有現(xiàn)成的函數(shù)：

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DateDiff(格式,日期1,日期2)

如今天到2010-5-1 8:00:00的時間差，代碼：

DateDiff("yyyy",Now,#2010-5-1 8:00:00#) '還有幾(整)年

DateDiff("q",Now,#2010-5-1 8:00:00#) '還有幾(整)季度

DateDiff("m",Now,#2010-5-1 8:00:00#) '還有幾(整)月

DateDiff("d",Now,#2010-5-1 8:00:00#) '還有幾(整)天

DateDiff("ww",Now,#2010-5-1 8:00:00#) '還有幾(整)周

DateDiff("h",Now,#2010-5-1 8:00:00#) '還有幾(整)小時

DateDiff("n",Now,#2010-5-1 8:00:00#) '還有幾(整)分鐘

DateDiff("s",Now,#2010-5-1 8:00:00#) '還有幾(整)秒

vb.net中datetimepicker控件的時間格式問題

還要設(shè)置Format 為 ： Custom

用的時候用DateTimePicker1.Text 不要用value

下面是我隨便用了兩個DateTimePicker和一個button一個textbox演示了一下的代碼,你根據(jù)自己的需要調(diào)試DateTimePicker風格

------------------------------------------------

Public Class Form1

Inherits System.Windows.Forms.Form

#Region

Public Sub New()

MyBase.New()

InitializeComponent()

End Sub

Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)

If disposing Then

If Not (components Is Nothing) Then

components.Dispose()

End If

End If

MyBase.Dispose(disposing)

End Sub

Private components As System.ComponentModel.IContainer

Friend WithEvents DateTimePicker1 As System.Windows.Forms.DateTimePicker

Friend WithEvents Button1 As System.Windows.Forms.Button

Friend WithEvents TextBox1 As System.Windows.Forms.TextBox

Friend WithEvents DateTimePicker2 As System.Windows.Forms.DateTimePicker

System.Diagnostics.DebuggerStepThrough() Private Sub InitializeComponent()

Me.DateTimePicker1 = New System.Windows.Forms.DateTimePicker

Me.Button1 = New System.Windows.Forms.Button

Me.TextBox1 = New System.Windows.Forms.TextBox

Me.DateTimePicker2 = New System.Windows.Forms.DateTimePicker

Me.SuspendLayout()

'

'DateTimePicker1

'

Me.DateTimePicker1.AllowDrop = True

Me.DateTimePicker1.CustomFormat = "yyyy-MM-dd"

Me.DateTimePicker1.Format = System.Windows.Forms.DateTimePickerFormat.Custom

Me.DateTimePicker1.Location = New System.Drawing.Point(56, 24)

Me.DateTimePicker1.Name = "DateTimePicker1"

Me.DateTimePicker1.ShowUpDown = True

Me.DateTimePicker1.Size = New System.Drawing.Size(160, 19)

Me.DateTimePicker1.TabIndex = 0

'

'Button1

'

Me.Button1.Location = New System.Drawing.Point(144, 128)

Me.Button1.Name = "Button1"

Me.Button1.TabIndex = 1

Me.Button1.Text = "Button1"

'

'TextBox1

'

Me.TextBox1.Location = New System.Drawing.Point(136, 72)

Me.TextBox1.Name = "TextBox1"

Me.TextBox1.TabIndex = 2

Me.TextBox1.Text = "TextBox1"

'

'DateTimePicker2

'

Me.DateTimePicker2.CustomFormat = "yyyy-MM-dd"

Me.DateTimePicker2.Format = System.Windows.Forms.DateTimePickerFormat.Custom

Me.DateTimePicker2.Location = New System.Drawing.Point(40, 160)

Me.DateTimePicker2.Name = "DateTimePicker2"

Me.DateTimePicker2.Size = New System.Drawing.Size(120, 19)

Me.DateTimePicker2.TabIndex = 3

'

'Form1

'

Me.AutoScaleBaseSize = New System.Drawing.Size(5, 12)

Me.ClientSize = New System.Drawing.Size(292, 273)

Me.Controls.Add(Me.DateTimePicker2)

Me.Controls.Add(Me.TextBox1)

Me.Controls.Add(Me.Button1)

Me.Controls.Add(Me.DateTimePicker1)

Me.Name = "Form1"

Me.Text = "Form1"

Me.ResumeLayout(False)

End Sub

#End Region

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

TextBox1.Text = DateTimePicker1.Text

End Sub

End Class

----------------------------------------------------------

我的操作系統(tǒng)和.net都是日文的,注釋的東西我刪除了,主要看代碼就好了

這段代碼你可以建一個空的解決方案，完全復(fù)制到里面去

vb.net中日期控件綁定

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如何使用VB.NET DateTimePicker控件

這個控件允許你選擇日期和時間；同時，由于這個控件允許你限制輸入內(nèi)容，你可以忽略合法的日期格式。DateTimePicker控件類似于MonthView控件，后者允許你選擇一個日期或日期范圍，但不支持時間選擇。在本文中，我將創(chuàng)建一個使用DateTimePicker控件的實例。實例在常用控件（Common Controls）下的工具箱(Toolbox)中找到DateTimePicker控件，并把它添加到Windows Forms中。設(shè)置以下屬性：l Name：dtpDateSelectionl CustomFormat：mm/dd/yyyyl Format：短l MaxDate：12/31/2008l MinDate：01/01/2007l ShowUpDown：假 在Form Load事件中添加以下代碼： dtpDateSelection.Value = Now 創(chuàng)建以下事件： Private Sub dtpDateSelection_CloseUp(ByVal sender As Object, ByVal e As System.EventArgs) Handles dtpDateSelection.CloseUp MessageBox.Show(dtpDateSelection.Value) End Sub 結(jié)果在第一個例子中，ShowUpDown屬性設(shè)為假，表示在用戶點擊控件時，控件的日歷部分可見。然后用戶從控件的日歷部分選擇日期。在DateTimePicker控件中選擇一個日期后，你的屏幕看起來與圖A類似。 現(xiàn)在，將ShowUpDown屬性值改為真，再次運行代碼。這次你不會看到控件的日歷部分，你可以點擊控件的上/下箭頭來選擇一個日期。其結(jié)果類似于圖B。 注意，這個控件不允許你選擇小于MinDate屬性值或大于MaxDate屬性值的日期。 更多信息你還可以使用許多其它屬性和重要的方法，讓DateTimePicker控件滿足你的需求。MSDN提供關(guān)于如何使用DateTimePicker控件的其它細節(jié)。 Irina Medvinskaya自1996年開始涉足技術(shù)領(lǐng)域。 查看本文國際來源

VB.NET,如何用TIMER控件計時

這種功能用不到TIMER，TIMER控件用在這種地方也不適合。(假如你所統(tǒng)計的時間很短，在幾分中內(nèi)話，可以使用，假如你統(tǒng)計的時間很長:幾小時、幾天幾夜，建議改用以下方式):

在你需要開始計時的地方加入一個記錄當前時間，在你想結(jié)束的地方也得到一個當前時間。然后將兩個時間相減。

希望以上思路可以幫到你。

VB.net中如何用timer控件編出一個簡單的倒計時器？

Dim?tCount?As?Integer?'用來計數(shù)

Private?Sub?Form1_Load(ByVal?sender?As?System.Object,?ByVal?e?As

System.EventArgs)?Handles?MyBase.Load

tCount?=?10

Timer1.Interval?=?1000?'每秒執(zhí)行一次

Timer1.Enabled?=?True

End

Sub

Private?Sub

Timer1_Tick(ByVal?sender?As?System.Object,?ByVal?e?As

System.EventArgs)?Handles?Timer1.Tick

tCount?-=?1

If?tCount?=?0?Then

MessageBox.Show("時間到")

Timer1.Enabled?=?False

End?If

End

Sub