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      VB.net 2010 視頻教程 VB.net 2010 視頻教程 VB.net 2010 視頻教程
      SQL Server 2008 視頻教程 c#入門經典教程 Visual Basic從門到精通視頻教程
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      首頁 > 編程開發 > .net教程 >
      • vb.net教程之計時器

      • 2015-01-17 22:52 來源:未知
      計時器(相關vb.net教程)
      作用:完成一些自動的處理。
      如動畫、定時時鐘、考試系統自動計時、自動模擬系統等。
      常用屬性:
      Enabled:能用與否。
      Interval:自動周期。
      應用實例:制作一個紅綠燈信號模擬系統。[實驗報告26 ]
      見紅綠燈信號模擬系統。程序為:
              Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
       Static i, m As Integer
              i = i + 1 : TextBox1.Text = i
              Beep()
              If i >= 16 Then
                  i = 0 : m = m + 1
              End If
              If (i >= 10 And i <= 16) Then
                  L2.BackColor = Color.Yellow
                  L2.Visible = Not L2.Visible
              Else
                  L2.BackColor = Color.Blue
              End If
              If m Mod 2 = 0 Then
                  L1.BackColor = Color.Green
                  L3.BackColor = Color.Blue
              Else
                  L1.BackColor = Color.Blue
                  L3.BackColor = Color.Red
              End If
          End Sub
          Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
              L1.BackColor = Color.Green
              L2.BackColor = Color.Blue
              L3.BackColor = Color.Blue
              Timer1.Interval = 1000
              Button1.Text = "退出"
              Me.BackColor = Color.Blue
              L1.Text = ""
              L2.Text = ""
              L3.Text = ""
          End Sub
          Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
              End
          End Sub
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