LinkLabel::Link::LinkData Property
Gets or sets the data associated with the link.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
You can use this property to supply information related to the link. The information provided by this property can be used within the LinkClicked event of the LinkLabel to provide information about the link that can be used to process the link being clicked. For example, you can specify the URL to display in Internet Explorer when the link is clicked as the value of the LinkData property. You can also use the LinkData property to identify a dialog to display when the user clicks on the link.
The following example demonstrates using the LinkLabel class, with multiple LinkArea sections defined, to display a label on a form. The example demonstrates setting the AutoSize, LinkBehavior, DisabledLinkColor, LinkColor, and VisitedLinkColor properties to customize the look of the LinkLabel. The first LinkArea is specified using the LinkLabel::LinkArea property. Additional links are added to the LinkLabel using the LinkLabel::LinkCollection::Add method. 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 ); }
Available since 1.1