LinkLabel.LinkVisited Propriété

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

Valeur de propriété

true si le lien doit être affiché comme s'il avait été visité ; sinon, false. La valeur par défaut est false.

Exemples

L’exemple suivant montre comment définir la propriété à l’aide LinkBehavior de l’énumération LinkBehavior . Il illustre également la définition des ActiveLinkColorpropriétés et LinkColor .LinkVisited Pour exécuter cet exemple, collez-le dans un formulaire vide et appelez InitializeLinkLabel à partir du constructeur ou Load de la méthode du formulaire.

   // 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

Remarques

Un LinkLabel contrôle ne désigne pas automatiquement qu’un lien est un lien visité. Pour afficher le lien en tant que lien visité, vous pouvez définir la valeur de cette propriété sur true dans un gestionnaire d’événements pour l’événement LinkClicked d’un LinkLabel. Un lien visité s’affiche à l’aide de la couleur spécifiée dans la VisitedLinkColor propriété du LinkLabel contrôle. Une fois le formulaire contenant le LinkLabel contrôle fermé, l’état « tout affichage » associé au lien est supprimé. Pour conserver l’état d’affichage du lien, vous devez stocker l’état d’affichage du lien dans un paramètre de Registre associé à votre application.

S’applique à