LinkLabel.LinkVisited Egenskap

public:
 property bool LinkVisited { bool get(); void set(bool value); };

public bool LinkVisited { get; set; }

member this.LinkVisited : bool with get, set

Public Property LinkVisited As Boolean

Egenskapsvärde

trueom länkar bör visas som om de besöktes; annars . false Standardvärdet är false.

Exempel

I följande exempel visas hur du anger LinkBehavior egenskapen med uppräkningen LinkBehavior . Det visar också hur du ställer in ActiveLinkColoregenskaperna , LinkColor och LinkVisited . Om du vill köra det här exemplet klistrar du in det i ett tomt formulär och anropar InitializeLinkLabel från formulärets konstruktor eller Load metod.

   // Declare the LinkLabel object.
internal:
   System::Windows::Forms::LinkLabel^ LinkLabel1;

   // Declare keywords array to identify links
   array<String^>^keywords;

private:
   void InitializeLinkLabel()
   {
      this->LinkLabel1 = gcnew System::Windows::Forms::LinkLabel;
      this->LinkLabel1->Links->Clear();
      // Set the location, name and size.
      this->LinkLabel1->Location = System::Drawing::Point( 10, 20 );
      this->LinkLabel1->Name = "CompanyLinks";
      this->LinkLabel1->Size = System::Drawing::Size( 104, 150 );
      
      // Set the LinkBehavior property to show underline when mouse
      // hovers over the links.
      this->LinkLabel1->LinkBehavior = System::Windows::Forms::LinkBehavior::HoverUnderline;
      String^ textString = "For more information see our"
      " company website or the research page at Contoso Ltd. ";
      
      // Set the text property.
      this->LinkLabel1->Text = textString;
      
      // Set the color of the links to black, unless the mouse
      // is hovering over a link.
      this->LinkLabel1->LinkColor = System::Drawing::Color::Black;
      this->LinkLabel1->ActiveLinkColor = System::Drawing::Color::Blue;
      
      // Associate the event-handling method with the LinkClicked
      // event.
      this->LinkLabel1->LinkClicked += gcnew LinkLabelLinkClickedEventHandler( this, &Form1::LinkLabel1_LinkClicked );
      
      // Add links to the LinkCollection using starting index and
      // length of keywords.
      array<String^>^temp0 = {"company","research"};
      keywords = temp0;
      System::Collections::IEnumerator^ myEnum = keywords->GetEnumerator();
      while ( myEnum->MoveNext() )
      {
         String^ keyword = safe_cast<String^>(myEnum->Current);
         this->LinkLabel1->Links->Add( textString->IndexOf( keyword ), keyword->Length );
      }

      
      // Add the label to the form.
      this->Controls->Add( this->LinkLabel1 );
   }

   void LinkLabel1_LinkClicked( Object^ /*sender*/, LinkLabelLinkClickedEventArgs^ e )
   {
      String^ url = "";
      
      // Determine which link was clicked and set the appropriate url.
      switch ( LinkLabel1->Links->IndexOf( e->Link ) )
      {
         case 0:
            url = "www.microsoft.com";
            break;

         case 1:
            url = "www.contoso.com/research";
            break;
      }
      
      // 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 );
   }

// Declare the LinkLabel object.
internal System.Windows.Forms.LinkLabel LinkLabel1;

// Declare keywords array to identify links
string[] keywords;

private void InitializeLinkLabel()
{
    this.LinkLabel1 = new System.Windows.Forms.LinkLabel();
            this.LinkLabel1.Links.Clear();

    // Set the location, name and size.
    this.LinkLabel1.Location = new System.Drawing.Point(10, 20);
    this.LinkLabel1.Name = "CompanyLinks";
    this.LinkLabel1.Size = new System.Drawing.Size(104, 150);

    // Set the LinkBehavior property to show underline when mouse
    // hovers over the links.
    this.LinkLabel1.LinkBehavior = System.Windows.Forms.LinkBehavior.HoverUnderline;
    string textString = "For more information see our" +
        " company website or the research page at Contoso Ltd. ";

    // Set the text property.
    this.LinkLabel1.Text = textString;

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

    // Associate the event-handling method with the LinkClicked
    // event.
    this.LinkLabel1.LinkClicked += 
        new LinkLabelLinkClickedEventHandler(LinkLabel1_LinkClicked);

    // Add links to the LinkCollection using starting index and
    // length of keywords.
    keywords = new string[]{"company", "research"};
    foreach ( string keyword in keywords )
    {
        this.LinkLabel1.Links.Add(textString.IndexOf(keyword), keyword.Length);
    }

    // Add the label to the form.
    this.Controls.Add(this.LinkLabel1);
}

private void LinkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
{

    string url = "";

    // Determine which link was clicked and set the appropriate url.
    switch(LinkLabel1.Links.IndexOf(e.Link))
    {
        case 0:
            url = "www.microsoft.com";

            break;
        case 1:
            url = "www.contoso.com/research";
            break;
    }

    // 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);
}

' 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

Kommentarer

En LinkLabel kontroll anger inte automatiskt att en länk är en besökt länk. Om du vill visa länken som en besökt länk kan du ange värdet för den här egenskapen till true i en händelsehanterare för LinkClicked händelsen för en LinkLabel. En besökt länk visas med den färg som anges i VisitedLinkColor kontrollens LinkLabel egenskap. När formuläret som innehåller LinkLabel kontrollen har stängts tas tillståndet "all display" som är associerad med länken bort. För att behålla visningstillståndet för länken måste du lagra visningstillståndet för länken i en registerinställning som är associerad med ditt program.