VB.NET LinkLabel.LinkVisited屬性代碼示例

' Declare the LinkLabel object.
Friend WithEvents LinkLabel1 As System.Windows.Forms.LinkLabel

' Declare keywords array to identify links
Dim keywords() As String

Private Sub InitializeLinkLabel()
    Me.LinkLabel1 = New System.Windows.Forms.LinkLabel
    Me.LinkLabel1.Links.Clear()
    ' Set the location, name and size.
    Me.LinkLabel1.Location = New System.Drawing.Point(10, 20)
    Me.LinkLabel1.Name = "CompanyLinks"
    Me.LinkLabel1.Size = New System.Drawing.Size(104, 150)

    ' Set the LinkBehavior property to show underline when mouse
    ' hovers over the links.
    Me.LinkLabel1.LinkBehavior = _
        System.Windows.Forms.LinkBehavior.HoverUnderline
    Dim textString As String = "For more information see our" & _
       " company website or the research page at Contoso Ltd. "

    ' Set the text property.
    Me.LinkLabel1.Text = textString

    ' Set the color of the links to black, unless the mouse
    ' is hovering over a link.
    Me.LinkLabel1.LinkColor = System.Drawing.Color.Black
    Me.LinkLabel1.ActiveLinkColor = System.Drawing.Color.Blue

    ' Add links to the LinkCollection using starting index and
    ' length of keywords.
    keywords = New String() {"company", "research"}
    Dim keyword As String
    For Each keyword In keywords
        Me.LinkLabel1.Links.Add(textString.IndexOf(keyword), keyword.Length)
    Next

    ' Add the label to the form.
    Me.Controls.Add(Me.LinkLabel1)
End Sub

Private Sub LinkLabel1_LinkClicked(ByVal sender As Object, _
    ByVal e As LinkLabelLinkClickedEventArgs) _
    Handles LinkLabel1.LinkClicked

    Dim url As String

    ' Determine which link was clicked and set the appropriate url.
    Select Case LinkLabel1.Links.IndexOf(e.Link)
        Case 0
            url = "www.microsoft.com"

        Case 1
            url = "www.contoso.com/research"
    End Select

    ' Set the visited property to True. This will change
    ' the color of the link.
    e.Link.Visited = True

    ' Open Internet Explorer to the correct url.
    System.Diagnostics.Process.Start("IExplore.exe", url)
End Sub

' 導入命名空間
Imports System
Imports System.Drawing
Imports System.Windows.Forms

Public Class MainClass

   Shared Sub Main()
        Dim myform As Form = New FrmLinkLabel()
        Application.Run(myform)

   End Sub ' Main

End Class

Public Class FrmLinkLabel
   Inherits Form

#Region " Windows Form Designer generated code "

   Public Sub New()
      MyBase.New()

      'This call is required by the Windows Form Designer.
      InitializeComponent()

      'Add any initialization after the InitializeComponent() call

   End Sub

   'Form overrides dispose to clean up the component list.
   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

   ' linklabels to C: drive, www.deitel.com and Notepad
   Friend WithEvents linkLabel As LinkLabel

   'Required by the Windows Form Designer
   Private components As System.ComponentModel.Container

   'NOTE: The following procedure is required by the Windows Form Designer
   'It can be modified using the Windows Form Designer.  
   'Do not modify it using the code editor.
   <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
      Me.linkLabel = New LinkLabel()
      Me.SuspendLayout()
      '
      'linkLabel
      '
      Me.linkLabel.Location = New System.Drawing.Point(72, 16)
      Me.linkLabel.Name = "linkLabel"
      Me.linkLabel.TabIndex = 0
      Me.linkLabel.TabStop = True
      Me.linkLabel.Text = "Open Notepad"
      '
      'FrmLinkLabel
      '
      Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
      Me.ClientSize = New System.Drawing.Size(364, 149)
      Me.Controls.AddRange(New Control() {Me.linkLabel})
      Me.Name = "FrmLinkLabel"
      Me.Text = "LinkLabelTest"
      Me.ResumeLayout(False)

   End Sub

#End Region

   ' browse C:\ drive
   Private Sub linkLabel_LinkClicked _
      (ByVal sender As System.Object, ByVal e As _
      System.Windows.Forms.LinkLabelLinkClickedEventArgs) _
      Handles linkLabel.LinkClicked

      linkLabel.LinkVisited = True

      System.Diagnostics.Process.Start("notepad")
  End Sub ' linkLabel

End Class