問題一:急寫出一個模擬秒錶的VB程式?
以下是一個簡單的VB程式,用於模擬秒錶計時器的基本功能。這個範例使用Windows Forms應用程式。
Public Class MainForm Dim startTime As DateTime Private Sub btnStart_Click(sender As Object, e As EventArgs) Handles btnStart.Click startTime = DateTime.Now Timer1.Start() End Sub Private Sub btnStop_Click(sender As Object, e As EventArgs) Handles btnStop.Click Timer1.Stop() End Sub Private Sub Timer1_Tick(sender As Object, e As EventArgs) Handles Timer1.Tick Dim elapsedTime As TimeSpan = DateTime.Now - startTime lblElapsedTime.Text = String.Format("{0:mm\:ss\.ff}", elapsedTime) End Sub End Class
這個程式包含一個計時器(Timer1)、開始按鈕(btnStart)、停止按鈕(btnStop)和一個用來顯示經過時間的標籤(lblElapsedTime)。當使用者點擊「開始」按鈕時,計時器開始計時;點擊「停止」按鈕時,計時器停止。經過的時間將顯示在標籤上。
問題二:如何用VB製作秒錶?
要用VB製作碼錶,可以使用Windows Forms應用程式和計時器控制項。以下是一個簡單的範例:
建立新的Windows Forms應用程式專案。
在窗體上新增下列控制項:
Public Class MainForm Dim startTime As DateTime Private Sub btnStart_Click(sender As Object, e As EventArgs) Handles btnStart.Click startTime = DateTime.Now Timer1.Start() End Sub Private Sub btnStop_Click(sender As Object, e As EventArgs) Handles btnStop.Click Timer1.Stop() End Sub Private Sub Timer1_Tick(sender As Object, e As EventArgs) Handles Timer1.Tick Dim elapsedTime As TimeSpan = DateTime.Now - startTime lblElapsedTime.Text = String.Format("{0:mm\:ss\.ff}", elapsedTime) End Sub End Class
問題三:使用VB做秒錶計時器?
建立新的Windows Forms應用程式專案。
Label 控制項(命名為lblElapsedTime,用於顯示經過時間)
###Start 按鈕(btnStart)######Stop 按鈕(btnStop)######################################################################################################### ####編寫以下VB程式碼:############Public Class MainForm Dim startTime As DateTime Private Sub btnStart_Click(sender As Object, e As EventArgs) Handles btnStart.Click startTime = DateTime.Now Timer1.Start() End Sub Private Sub btnStop_Click(sender As Object, e As EventArgs) Handles btnStop.Click Timer1.Stop() End Sub Private Sub Timer1_Tick(sender As Object, e As EventArgs) Handles Timer1.Tick Dim elapsedTime As TimeSpan = DateTime.Now - startTime lblElapsedTime.Text = String.Format("{0:mm\:ss\.ff}", elapsedTime) End Sub End Class
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