LinkLabel::LinkCollection::IndexOf Method (LinkLabel::Link^)
Returns the index of the specified link within the collection.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
Parameters
- link
-
Type:
System.Windows.Forms::LinkLabel::Link^
A LinkLabel::Link representing the link to search for in the collection.
Return Value
Type: System::Int32The zero-based index where the link is located within the collection; otherwise, negative one (-1).
The IndexOf method enables you to determine where a link is located within the collection. To determine if a link is located within the collection before calling this method, use the Contains method.
The following code example demonstrates setting the LinkBehavior property using the LinkBehavior enumeration. It also demonstrates setting the ActiveLinkColor, LinkColor, Text and LinkVisited properties and adding and accessing links in a LinkLabel::LinkCollection. To run this example, paste it in a blank form and call InitializeLinkLabel from the form's constructor or Load event handler.
// 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 ); }
Available since 1.1