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LinkLabelLinkClickedEventHandler デリゲート

LinkLabelLinkClicked イベントを処理するメソッドを表します。

<Serializable>
Public Delegate Sub LinkLabelLinkClickedEventHandler( _   ByVal sender As Object, _   ByVal e As LinkLabelLinkClickedEventArgs _)
[C#]
[Serializable]
public delegate void LinkLabelLinkClickedEventHandler(   object sender,   LinkLabelLinkClickedEventArgs e);
[C++]
[Serializable]
public __gc __delegate void LinkLabelLinkClickedEventHandler(   Object* sender,   LinkLabelLinkClickedEventArgs* e);

[JScript] JScript では、.NET Framework のデリゲートを利用することができます。ただし、独自に定義することはできません。

パラメータ [Visual Basic, C#, C++]

作成するイベント ハンドラは、LinkLabelLinkClickedEventHandler クラスのデリゲート定義と同一のパラメータを持つ必要があります。

解説

LinkLabelLinkClickedEventHandler デリゲートを作成する場合は、イベントを処理するメソッドを識別してください。イベントをイベント ハンドラに関連付けるには、デリゲートのインスタンスをイベントに追加します。デリゲートを削除しない限り、イベントが発生するたびにイベント ハンドラが呼び出されます。デリゲートの詳細については、「 イベントとデリゲート 」を参照してください。

使用例

[Visual Basic, C#, C++] 複数の LinkArea セクションが定義されている LinkLabel クラスを使用して、フォームにラベルを表示する例を次に示します。 AutoSizeLinkBehaviorDisabledLinkColorLinkColor 、および VisitedLinkColor などの各プロパティを設定して LinkLabel の外観をカスタマイズする例を次に示します。最初の LinkArea は、 LinkLabel.LinkArea プロパティを使用して指定されます。追加のリンクは、 LinkCollection.Add メソッドを使用して LinkLabel に追加されます。この例では、 LinkClicked イベントを使用して、Web ブラウザを起動してハイパーリンクにアクセスし、その他のリンクを示す MessageBox を表示しています。

 
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 (Nothing <> target) And (target.StartsWith("www")) Then
            System.Diagnostics.Process.Start(target)
        Else
            MessageBox.Show(("Item clicked: " + target))
        End If

    End Sub

End Class

[C#] 
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);
        }
    }
}

[C++] 
#using <mscorlib.dll>
#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 __gc class Form1 : public System::Windows::Forms::Form {
private:
   System::Windows::Forms::LinkLabel*  linkLabel1;
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 =  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 += new 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->Item[0]->Visited = true;

      // Set the Text property to a String*.
      this->linkLabel1->Text = S"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->Item[0]->LinkData = S"Register";
         this->linkLabel1->Links->Add(24, 9, S"www.microsoft.com");
         this->linkLabel1->Links->Add(42, 3, S"www.msn.com");
         this->linkLabel1->Links->Item[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);

      System::Windows::Forms::Control* temp0 [] = {this->linkLabel1};

      this->Controls->AddRange(temp0);
      this->Text = S"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->Item[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 (0 != target && target->StartsWith(S"www")) {
         System::Diagnostics::Process::Start(target);
      } else {
         MessageBox::Show(S"Item clicked: {0}", target);
      }
   }
};

[STAThread]
int main() {
   Application::Run(new Form1());
}

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必要条件

名前空間: System.Windows.Forms

プラットフォーム: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 ファミリ

アセンブリ: System.Windows.Forms (System.Windows.Forms.dll 内)

参照

System.Windows.Forms 名前空間