LinkArea LinkArea LinkArea LinkArea Struct

Definition

Stellt einen Bereich in einem LinkLabel Steuerelement, das einen Link innerhalb des Steuerelements darstellt.Represents an area within a LinkLabel control that represents a hyperlink within the control.

public value class LinkArea
[System.ComponentModel.TypeConverter(typeof(System.Windows.Forms.LinkArea/LinkAreaConverter))]
[System.Serializable]
public struct LinkArea
type LinkArea = struct
Public Structure LinkArea
Vererbung
Attribute

Beispiele

Das folgende Codebeispiel veranschaulicht die Verwendung der LinkLabel Klasse, wobei mehrere LinkArea Abschnitten definiert sind, um eine Bezeichnung auf einem Formular angezeigt.The following code example demonstrates using the LinkLabel class, with multiple LinkArea sections defined, to display a label on a form. Das Beispiel veranschaulicht das Festlegen der AutoSize, LinkBehavior, DisabledLinkColor, LinkColor, und VisitedLinkColor Eigenschaften zum Anpassen des Aussehens von der LinkLabel.The example demonstrates setting the AutoSize, LinkBehavior, DisabledLinkColor, LinkColor, and VisitedLinkColor properties to customize the look of the LinkLabel. Die erste LinkArea angegeben ist, mit der LinkLabel.LinkArea Eigenschaft.The first LinkArea is specified using the LinkLabel.LinkArea property. Weitere Links werden hinzugefügt, um die LinkLabel mithilfe der LinkLabel.LinkCollection.Add Methode.Additional links are added to the LinkLabel using the LinkLabel.LinkCollection.Add method. Die Beispiel-Handles der LinkClicked Ereignis durch Starten des Webbrowsers für Links und Anzeigen einer MessageBox für andere Links.The example handles the LinkClicked event by starting the Web browser for hyperlinks, and displaying a MessageBox for other links.

#using <System.dll>
#using <System.Windows.Forms.dll>
#using <System.Drawing.dll>

using namespace System;
using namespace System::Drawing;
using namespace System::Windows::Forms;
public ref class Form1: public System::Windows::Forms::Form
{
private:
   System::Windows::Forms::LinkLabel^ linkLabel1;

public:
   Form1()
   {
      
      // Create the LinkLabel.
      this->linkLabel1 = gcnew System::Windows::Forms::LinkLabel;
      
      // Configure the LinkLabel's size and location. Specify that the
      // size should be automatically determined by the content.
      this->linkLabel1->Location = System::Drawing::Point( 34, 56 );
      this->linkLabel1->Size = System::Drawing::Size( 224, 16 );
      this->linkLabel1->AutoSize = true;
      
      // Configure the appearance.
      this->linkLabel1->DisabledLinkColor = System::Drawing::Color::Red;
      this->linkLabel1->VisitedLinkColor = System::Drawing::Color::Blue;
      this->linkLabel1->LinkBehavior = System::Windows::Forms::LinkBehavior::HoverUnderline;
      this->linkLabel1->LinkColor = System::Drawing::Color::Navy;
      this->linkLabel1->TabIndex = 0;
      this->linkLabel1->TabStop = true;
      
      // Add an event handler to do something when the links are clicked.
      this->linkLabel1->LinkClicked += gcnew System::Windows::Forms::LinkLabelLinkClickedEventHandler( this, &Form1::linkLabel1_LinkClicked );
      
      // Identify what the first Link is.
      this->linkLabel1->LinkArea = System::Windows::Forms::LinkArea( 0, 8 );
      
      // Identify that the first link is visited already.
      this->linkLabel1->Links[ 0 ]->Visited = true;
      
      // Set the Text property to a String*.
      this->linkLabel1->Text = "Register Online.  Visit Microsoft.  Visit MSN.";
      
      // Create new links using the Add method of the LinkCollection class.
      // Underline the appropriate words in the LinkLabel's Text property.
      // The words 'Register', 'Microsoft', and 'MSN' will
      // all be underlined and behave as hyperlinks.
      // First check that the Text property is long enough to accommodate
      // the desired hyperlinked areas.  If it's not, don't add hyperlinks.
      if ( this->linkLabel1->Text->Length >= 45 )
      {
         this->linkLabel1->Links[ 0 ]->LinkData = "Register";
         this->linkLabel1->Links->Add( 24, 9, "www.microsoft.com" );
         this->linkLabel1->Links->Add( 42, 3, "www.msn.com" );
         this->linkLabel1->Links[ 1 ]->Enabled = false;
      }

      
      // Set up how the form should be displayed and add the controls to the form.
      this->ClientSize = System::Drawing::Size( 292, 266 );
      array<System::Windows::Forms::Control^>^temp0 = {this->linkLabel1};
      this->Controls->AddRange( temp0 );
      this->Text = "Link Label Example";
   }


private:
   void linkLabel1_LinkClicked( Object^ /*sender*/, System::Windows::Forms::LinkLabelLinkClickedEventArgs^ e )
   {
      // Determine which link was clicked within the LinkLabel.
      this->linkLabel1->Links[ linkLabel1->Links->IndexOf( e->Link ) ]->Visited = true;
      
      // Display the appropriate link based on the value of the
      // LinkData property of the Link Object*.
      String^ target = dynamic_cast<String^>(e->Link->LinkData);
      
      // If the value looks like a URL, navigate to it.
      // Otherwise, display it in a message box.
      if ( nullptr != target && target->StartsWith( "www" ) )
      {
         System::Diagnostics::Process::Start( target );
      }
      else
      {
         MessageBox::Show( "Item clicked: {0}", target );
      }
   }
};

[STAThread]
int main()
{
   Application::Run( gcnew Form1 );
}
using System;
using System.Drawing;
using System.Windows.Forms;

public class Form1 : System.Windows.Forms.Form
{
    private System.Windows.Forms.LinkLabel linkLabel1;
    
    [STAThread]
    static void Main() 
    {
        Application.Run(new Form1());
    }

    public Form1()
    {
        // Create the LinkLabel.
        this.linkLabel1 = new System.Windows.Forms.LinkLabel();

        // Configure the LinkLabel's size and location. Specify that the
        // size should be automatically determined by the content.
        this.linkLabel1.Location = new System.Drawing.Point(34, 56);
        this.linkLabel1.Size = new System.Drawing.Size(224, 16);
        this.linkLabel1.AutoSize = true;

        // Configure the appearance. 
        // Set the DisabledLinkColor so that a disabled link will show up against the form's background.
        this.linkLabel1.DisabledLinkColor = System.Drawing.Color.Red;
        this.linkLabel1.VisitedLinkColor = System.Drawing.Color.Blue;
        this.linkLabel1.LinkBehavior = System.Windows.Forms.LinkBehavior.HoverUnderline;
        this.linkLabel1.LinkColor = System.Drawing.Color.Navy;
        
        this.linkLabel1.TabIndex = 0;
        this.linkLabel1.TabStop = true;
        

        // Add an event handler to do something when the links are clicked.
        this.linkLabel1.LinkClicked += new System.Windows.Forms.LinkLabelLinkClickedEventHandler(this.linkLabel1_LinkClicked);

        // Identify what the first Link is.
        this.linkLabel1.LinkArea = new System.Windows.Forms.LinkArea(0, 8);

        // Identify that the first link is visited already.
        this.linkLabel1.Links[0].Visited = true;
        
        // Set the Text property to a string.
        this.linkLabel1.Text = "Register Online.  Visit Microsoft.  Visit MSN.";

        // Create new links using the Add method of the LinkCollection class.
        // Underline the appropriate words in the LinkLabel's Text property.
        // The words 'Register', 'Microsoft', and 'MSN' will 
        // all be underlined and behave as hyperlinks.

        // First check that the Text property is long enough to accommodate
        // the desired hyperlinked areas.  If it's not, don't add hyperlinks.
        if(this.linkLabel1.Text.Length >= 45)
        {
            this.linkLabel1.Links[0].LinkData = "Register";
            this.linkLabel1.Links.Add(24, 9, "www.microsoft.com");
            this.linkLabel1.Links.Add(42, 3, "www.msn.com");
        //  The second link is disabled and will appear as red.
            this.linkLabel1.Links[1].Enabled = false;
        }
        
        // Set up how the form should be displayed and add the controls to the form.
        this.ClientSize = new System.Drawing.Size(292, 266);
        this.Controls.AddRange(new System.Windows.Forms.Control[] {this.linkLabel1});
        this.Text = "Link Label Example";
    }

    private void linkLabel1_LinkClicked(object sender, System.Windows.Forms.LinkLabelLinkClickedEventArgs e)
    {
        // Determine which link was clicked within the LinkLabel.
        this.linkLabel1.Links[linkLabel1.Links.IndexOf(e.Link)].Visited = true;

        // Display the appropriate link based on the value of the 
        // LinkData property of the Link object.
        string target = e.Link.LinkData as string;

        // If the value looks like a URL, navigate to it.
        // Otherwise, display it in a message box.
        if(null != target && target.StartsWith("www"))
        {
            System.Diagnostics.Process.Start(target);
        }
        else
        {    
            MessageBox.Show("Item clicked: " + target);
        }
    }
}
Imports System
Imports System.Drawing
Imports System.Windows.Forms

Public NotInheritable Class Form1
    Inherits System.Windows.Forms.Form

    Friend WithEvents LinkLabel1 As System.Windows.Forms.LinkLabel

    <System.STAThread()> _
    Public Shared Sub Main()
        System.Windows.Forms.Application.Run(New Form1)
    End Sub 'Main

    Public Sub New()
        MyBase.New()


        Me.LinkLabel1 = New System.Windows.Forms.LinkLabel

        ' Configure the LinkLabel's size and location. Specify that the
        ' size should be automatically determined by the content.
        Me.linkLabel1.Location = New System.Drawing.Point(34, 56) 
        Me.linkLabel1.Size = New System.Drawing.Size(224, 16) 
        Me.linkLabel1.AutoSize = True 

        ' Configure the appearance.
        ' Set the DisabledLinkColor so that a disabled link will show up against the form's background.
        Me.linkLabel1.DisabledLinkColor = System.Drawing.Color.Red 
        Me.linkLabel1.VisitedLinkColor = System.Drawing.Color.Blue 
        Me.linkLabel1.LinkBehavior = System.Windows.Forms.LinkBehavior.HoverUnderline 
        Me.linkLabel1.LinkColor = System.Drawing.Color.Navy 
        
        Me.linkLabel1.TabIndex = 0 
        Me.linkLabel1.TabStop = True 
        
        ' Identify what the first Link is.
        Me.linkLabel1.LinkArea = New System.Windows.Forms.LinkArea(0, 8)

        ' Identify that the first link is visited already.
        Me.linkLabel1.Links(0).Visited = true
        
        ' Set the Text property to a string.
        Me.linkLabel1.Text = "Register Online.  Visit Microsoft.  Visit MSN."

        ' Create new links using the Add method of the LinkCollection class.
        ' Underline the appropriate words in the LinkLabel's Text property.
        ' The words 'Register', 'Microsoft', and 'MSN' will 
        ' all be underlined and behave as hyperlinks.

        ' First check that the Text property is long enough to accommodate
        ' the desired hyperlinked areas.  If it's not, don't add hyperlinks.
        If Me.LinkLabel1.Text.Length >= 45 Then
            Me.LinkLabel1.Links(0).LinkData = "Register"
            Me.LinkLabel1.Links.Add(24, 9, "www.microsoft.com")
            Me.LinkLabel1.Links.Add(42, 3, "www.msn.com")
            ' The second link is disabled and will appear as red.
            Me.linkLabel1.Links(1).Enabled = False
        End If

        ' Set up how the form should be displayed and adds the controls to the form.
        Me.ClientSize = New System.Drawing.Size(292, 266)
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.LinkLabel1})
        Me.Text = "Link Label Example"
    End Sub

    Private Sub linkLabel1_LinkClicked(ByVal sender As Object, _
                ByVal e As System.Windows.Forms.LinkLabelLinkClickedEventArgs) Handles LinkLabel1.LinkClicked

        ' Determine which link was clicked within the LinkLabel.
        Me.LinkLabel1.Links(LinkLabel1.Links.IndexOf(e.Link)).Visited = True

        ' Displays the appropriate link based on the value of the LinkData property of the Link object.
        Dim target As String = CType(e.Link.LinkData, String)

        ' If the value looks like a URL, navigate to it.
        ' Otherwise, display it in a message box.
        If (target IsNot Nothing) AndAlso (target.StartsWith("www")) Then
            System.Diagnostics.Process.Start(target)
        Else
            MessageBox.Show(("Item clicked: " + target))
        End If

    End Sub

End Class

Hinweise

Es gibt zwei Möglichkeiten zum Hinzufügen eines Links auf den Text einer LinkLabel Steuerelement.There are two ways to add a hyperlink to the text of a LinkLabel control. Sie erreichen die Add -Methode der der LinkLabel.LinkCollection Klasse über die Links Eigenschaft der LinkLabel mehrere Links Text des Steuerelements hinzu.You can access the Add method of the LinkLabel.LinkCollection class through the Links property of the LinkLabel to add multiple hyperlinks to the control's text. Wenn Sie nur einen einzelnen Link zu den Text des Steuerelements hinzufügen möchten, können Sie mithilfe der LinkArea Eigenschaft der LinkLabel.If you only need to add a single hyperlink to the text of the control, you can use the LinkArea property of the LinkLabel. Diese Eigenschaft akzeptiert einen LinkArea , der den Speicherort des Links im Text des Steuerelements definiert.This property accepts a LinkArea that defines the location of the hyperlink within the control's text. Wenn Sie ein Link mit angegeben wird der LinkArea Eigenschaft Linkbereich wird dann hinzugefügt der LinkLabel.LinkCollection auf die gleiche Weise wie das Hinzufügen der Verknüpfung mit der Add -Methode der der LinkLabel.LinkCollection.When a hyperlink is specified using the LinkArea property, the link area is then added to the LinkLabel.LinkCollection in the same manner as adding the link using the Add method of the LinkLabel.LinkCollection.

Die Length Eigenschaft gibt die Anzahl der Zeichen im Text des an die LinkLabel Linkbereich einschließt.The Length property specifies the number of characters within the text of the LinkLabel to include in the link area. Die Start Eigenschaft gibt das erste Zeichen in den Text des Steuerelements links einschließt.The Start property specifies the first character in the control text to include in the hyperlink. Sollten Sie bestimmen, ob ein bestimmtes LinkArea ist leer ist, können Sie die IsEmpty -Eigenschaft anstelle der Überprüfung von Werten der Start und Length Eigenschaften.If you want to determine whether a specific LinkArea is empty, you can use the IsEmpty property instead of checking the values of the Start and Length properties.

Konstruktoren

LinkArea(Int32, Int32) LinkArea(Int32, Int32) LinkArea(Int32, Int32) LinkArea(Int32, Int32)

Initialisiert eine neue Instanz der LinkArea-Klasse.Initializes a new instance of the LinkArea class.

Eigenschaften

IsEmpty IsEmpty IsEmpty IsEmpty

Ruft einen Wert ab, der angibt, ob LinkArea leer ist.Gets a value indicating whether the LinkArea is empty.

Length Length Length Length

Übernimmt oder bestimmt die Anzahl der Zeichen im Linkbereich.Gets or sets the number of characters in the link area.

Start Start Start Start

Übernimmt oder bestimmt die Anfangsposition des Linkbereichs den Text der LinkLabel.Gets or sets the starting location of the link area within the text of the LinkLabel.

Methoden

Equals(Object) Equals(Object) Equals(Object) Equals(Object)

Bestimmt, ob dies LinkArea mit dem angegebenen Objekt identisch ist.Determines whether this LinkArea is equal to the specified object.

GetHashCode() GetHashCode() GetHashCode() GetHashCode()

Gibt den Hashcode für diese Instanz zurück.Returns the hash code for this instance.

ToString() ToString() ToString() ToString()

Gibt den voll qualifizierten Typnamen dieser Instanz zurück.Returns the fully qualified type name of this instance.

Operatoren

Equality(LinkArea, LinkArea) Equality(LinkArea, LinkArea) Equality(LinkArea, LinkArea) Equality(LinkArea, LinkArea)

Gibt einen Wert zurück, der angibt, ob zwei Instanzen der LinkArea-Klasse gleich sind.Returns a value indicating whether two instances of the LinkArea class are equal.

Inequality(LinkArea, LinkArea) Inequality(LinkArea, LinkArea) Inequality(LinkArea, LinkArea) Inequality(LinkArea, LinkArea)

Gibt einen Wert zurück, der angibt, ob zwei Instanzen der LinkArea-Klasse ungleich sind.Returns a value indicating whether two instances of the LinkArea class are not equal.

Gilt für:

Siehe auch