Практическое руководство. Добавление функциональности веб-браузера в приложения Windows Forms
Элемент управления WebBrowser позволяет добавить в приложение функциональность веб-браузера. По умолчанию он работает как веб-браузер. После загрузки начального URL-адреса путем установки свойства Url можно переходить по гиперссылкам, а также совершать переход вперед и назад по истории навигации с помощью сочетаний клавиш. Дополнительные функциональные возможности браузера по умолчанию доступны в контекстном меню, появляющемся при щелчке правой кнопки мыши. Вы также можете открывать новые документы, сбрасывая их в элемент управления. Кроме того, элемент управления WebBrowser имеет несколько свойств, методов и событий, которые можно использовать для реализации возможностей пользовательского интерфейса, аналогичных имеющимся в Internet Explorer.
В примере кода ниже реализуются адресная строка, стандартные кнопки браузера, меню Файл, строка состояния и строка заголовка, в которой содержится заголовок текущей страницы.
Пример
#using <System.Drawing.dll>
#using <System.dll>
#using <System.Windows.Forms.dll>
using namespace System;
using namespace System::Security::Permissions;
public ref class Form1: public System::Windows::Forms::Form
{
public:
Form1()
{
//This call is required by the Windows Form Designer.
InitializeComponent();
//Add any initialization after the InitializeComponent() call
}
private:
//NOTE: The following procedure is required by the Windows Form Designer
//It can be modified using the Windows Form Designer.
//Do not modify it using the code editor.
System::Windows::Forms::MainMenu^ MainMenu1;
System::Windows::Forms::MenuItem^ MenuItemFile;
System::Windows::Forms::MenuItem^ MenuItemFileSaveAs;
System::Windows::Forms::MenuItem^ MenuItemFilePageSetup;
System::Windows::Forms::MenuItem^ MenuItemFilePrint;
System::Windows::Forms::MenuItem^ MenuItemFilePrintPreview;
System::Windows::Forms::MenuItem^ MenuItemFileProperties;
System::Windows::Forms::TextBox^ TextBoxAddress;
System::Windows::Forms::Button^ ButtonGo;
System::Windows::Forms::Button^ backButton;
System::Windows::Forms::Button^ ButtonForward;
System::Windows::Forms::Button^ ButtonStop;
System::Windows::Forms::Button^ ButtonRefresh;
System::Windows::Forms::Button^ ButtonHome;
System::Windows::Forms::Button^ ButtonSearch;
System::Windows::Forms::Panel^ Panel1;
System::Windows::Forms::WebBrowser ^ WebBrowser1;
System::Windows::Forms::StatusBar^ StatusBar1;
System::Windows::Forms::MenuItem^ MenuItem1;
System::Windows::Forms::MenuItem^ MenuItem2;
System::Windows::Forms::Button^ ButtonPrint;
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
void InitializeComponent()
{
this->MainMenu1 = gcnew System::Windows::Forms::MainMenu;
this->MenuItemFile = gcnew System::Windows::Forms::MenuItem;
this->MenuItemFileSaveAs = gcnew System::Windows::Forms::MenuItem;
this->MenuItem1 = gcnew System::Windows::Forms::MenuItem;
this->MenuItemFilePageSetup = gcnew System::Windows::Forms::MenuItem;
this->MenuItemFilePrint = gcnew System::Windows::Forms::MenuItem;
this->MenuItemFilePrintPreview = gcnew System::Windows::Forms::MenuItem;
this->MenuItem2 = gcnew System::Windows::Forms::MenuItem;
this->MenuItemFileProperties = gcnew System::Windows::Forms::MenuItem;
this->TextBoxAddress = gcnew System::Windows::Forms::TextBox;
this->ButtonGo = gcnew System::Windows::Forms::Button;
this->backButton = gcnew System::Windows::Forms::Button;
this->ButtonForward = gcnew System::Windows::Forms::Button;
this->ButtonStop = gcnew System::Windows::Forms::Button;
this->ButtonRefresh = gcnew System::Windows::Forms::Button;
this->ButtonHome = gcnew System::Windows::Forms::Button;
this->ButtonSearch = gcnew System::Windows::Forms::Button;
this->ButtonPrint = gcnew System::Windows::Forms::Button;
this->Panel1 = gcnew System::Windows::Forms::Panel;
this->WebBrowser1 = gcnew System::Windows::Forms::WebBrowser;
this->StatusBar1 = gcnew System::Windows::Forms::StatusBar;
this->Panel1->SuspendLayout();
this->SuspendLayout();
//
// MainMenu1
//
array<System::Windows::Forms::MenuItem^>^temp0 = {this->MenuItemFile};
this->MainMenu1->MenuItems->AddRange( temp0 );
this->MainMenu1->Name = "MainMenu1";
//
// MenuItemFile
//
this->MenuItemFile->Index = 0;
array<System::Windows::Forms::MenuItem^>^temp1 = {this->MenuItemFileSaveAs,this->MenuItem1,this->MenuItemFilePageSetup,this->MenuItemFilePrint,this->MenuItemFilePrintPreview,this->MenuItem2,this->MenuItemFileProperties};
this->MenuItemFile->MenuItems->AddRange( temp1 );
this->MenuItemFile->Name = "MenuItemFile";
this->MenuItemFile->Text = "&File";
//
// MenuItemFileSaveAs
//
this->MenuItemFileSaveAs->Index = 0;
this->MenuItemFileSaveAs->Name = "MenuItemFileSaveAs";
this->MenuItemFileSaveAs->Text = " Save &As";
this->MenuItemFileSaveAs->Click += gcnew System::EventHandler( this, &Form1::MenuItemFileSaveAs_Click );
//
// MenuItem1
//
this->MenuItem1->Index = 1;
this->MenuItem1->Name = "MenuItem1";
this->MenuItem1->Text = "-";
//
// MenuItemFilePageSetup
//
this->MenuItemFilePageSetup->Index = 2;
this->MenuItemFilePageSetup->Name = "MenuItemFilePageSetup";
this->MenuItemFilePageSetup->Text = "Page Set&up...";
this->MenuItemFilePageSetup->Click += gcnew System::EventHandler( this, &Form1::MenuItemFilePageSetup_Click );
//
// MenuItemFilePrint
//
this->MenuItemFilePrint->Index = 3;
this->MenuItemFilePrint->Name = "MenuItemFilePrint";
this->MenuItemFilePrint->Text = "&Print...";
this->MenuItemFilePrint->Click += gcnew System::EventHandler( this, &Form1::MenuItemFilePrint_Click );
//
// MenuItemFilePrintPreview
//
this->MenuItemFilePrintPreview->Index = 4;
this->MenuItemFilePrintPreview->Name = "MenuItemFilePrintPreview";
this->MenuItemFilePrintPreview->Text = "Print Pre&view...";
this->MenuItemFilePrintPreview->Click += gcnew System::EventHandler( this, &Form1::MenuItemFilePrintPreview_Click );
//
// MenuItem2
//
this->MenuItem2->Index = 5;
this->MenuItem2->Name = "MenuItem2";
this->MenuItem2->Text = "-";
//
// MenuItemFileProperties
//
this->MenuItemFileProperties->Index = 6;
this->MenuItemFileProperties->Name = "MenuItemFileProperties";
this->MenuItemFileProperties->Text = "P&roperties";
this->MenuItemFileProperties->Click += gcnew System::EventHandler( this, &Form1::MenuItemFileProperties_Click );
//
// TextBoxAddress
//
this->TextBoxAddress->Location = System::Drawing::Point( 0, 0 );
this->TextBoxAddress->Name = "TextBoxAddress";
this->TextBoxAddress->Size = System::Drawing::Size( 240, 20 );
this->TextBoxAddress->TabIndex = 1;
this->TextBoxAddress->Text = "";
this->TextBoxAddress->KeyDown += gcnew System::Windows::Forms::KeyEventHandler( this, &Form1::TextBoxAddress_KeyDown );
//
// ButtonGo
//
this->ButtonGo->Location = System::Drawing::Point( 240, 0 );
this->ButtonGo->Name = "ButtonGo";
this->ButtonGo->Size = System::Drawing::Size( 48, 24 );
this->ButtonGo->TabIndex = 2;
this->ButtonGo->Text = "Go";
this->ButtonGo->Click += gcnew System::EventHandler( this, &Form1::ButtonGo_Click );
//
// backButton
//
this->backButton->Location = System::Drawing::Point( 288, 0 );
this->backButton->Name = "backButton";
this->backButton->Size = System::Drawing::Size( 48, 24 );
this->backButton->TabIndex = 3;
this->backButton->Text = "Back";
this->backButton->Click += gcnew System::EventHandler( this, &Form1::backButton_Click );
//
// ButtonForward
//
this->ButtonForward->Location = System::Drawing::Point( 336, 0 );
this->ButtonForward->Name = "ButtonForward";
this->ButtonForward->Size = System::Drawing::Size( 48, 24 );
this->ButtonForward->TabIndex = 4;
this->ButtonForward->Text = "Forward";
this->ButtonForward->Click += gcnew System::EventHandler( this, &Form1::ButtonForward_Click );
//
// ButtonStop
//
this->ButtonStop->Location = System::Drawing::Point( 384, 0 );
this->ButtonStop->Name = "ButtonStop";
this->ButtonStop->Size = System::Drawing::Size( 48, 24 );
this->ButtonStop->TabIndex = 5;
this->ButtonStop->Text = "Stop";
this->ButtonStop->Click += gcnew System::EventHandler( this, &Form1::ButtonStop_Click );
//
// ButtonRefresh
//
this->ButtonRefresh->Location = System::Drawing::Point( 432, 0 );
this->ButtonRefresh->Name = "ButtonRefresh";
this->ButtonRefresh->Size = System::Drawing::Size( 48, 24 );
this->ButtonRefresh->TabIndex = 6;
this->ButtonRefresh->Text = "Refresh";
this->ButtonRefresh->Click += gcnew System::EventHandler( this, &Form1::ButtonRefresh_Click );
//
// ButtonHome
//
this->ButtonHome->Location = System::Drawing::Point( 480, 0 );
this->ButtonHome->Name = "ButtonHome";
this->ButtonHome->Size = System::Drawing::Size( 48, 24 );
this->ButtonHome->TabIndex = 7;
this->ButtonHome->Text = "Home";
this->ButtonHome->Click += gcnew System::EventHandler( this, &Form1::ButtonHome_Click );
//
// ButtonSearch
//
this->ButtonSearch->Location = System::Drawing::Point( 528, 0 );
this->ButtonSearch->Name = "ButtonSearch";
this->ButtonSearch->Size = System::Drawing::Size( 48, 24 );
this->ButtonSearch->TabIndex = 8;
this->ButtonSearch->Text = "Search";
this->ButtonSearch->Click += gcnew System::EventHandler( this, &Form1::ButtonSearch_Click );
//
// ButtonPrint
//
this->ButtonPrint->Location = System::Drawing::Point( 576, 0 );
this->ButtonPrint->Name = "ButtonPrint";
this->ButtonPrint->Size = System::Drawing::Size( 48, 24 );
this->ButtonPrint->TabIndex = 9;
this->ButtonPrint->Text = "Print";
this->ButtonPrint->Click += gcnew System::EventHandler( this, &Form1::ButtonPrint_Click );
//
// Panel1
//
this->Panel1->Controls->Add( this->ButtonPrint );
this->Panel1->Controls->Add( this->TextBoxAddress );
this->Panel1->Controls->Add( this->ButtonGo );
this->Panel1->Controls->Add( this->backButton );
this->Panel1->Controls->Add( this->ButtonForward );
this->Panel1->Controls->Add( this->ButtonStop );
this->Panel1->Controls->Add( this->ButtonRefresh );
this->Panel1->Controls->Add( this->ButtonHome );
this->Panel1->Controls->Add( this->ButtonSearch );
this->Panel1->Dock = System::Windows::Forms::DockStyle::Top;
this->Panel1->Location = System::Drawing::Point( 0, 0 );
this->Panel1->Name = "Panel1";
this->Panel1->Size = System::Drawing::Size( 624, 24 );
this->Panel1->TabIndex = 11;
//
// WebBrowser1
//
this->WebBrowser1->AllowWebBrowserDrop = false;
this->WebBrowser1->ScriptErrorsSuppressed = true;
this->WebBrowser1->WebBrowserShortcutsEnabled = false;
this->WebBrowser1->Dock = System::Windows::Forms::DockStyle::Fill;
this->WebBrowser1->IsWebBrowserContextMenuEnabled = false;
this->WebBrowser1->Location = System::Drawing::Point( 0, 24 );
this->WebBrowser1->Name = "WebBrowser1";
this->WebBrowser1->Size = System::Drawing::Size( 624, 389 );
this->WebBrowser1->TabIndex = 10;
this->WebBrowser1->StatusTextChanged += gcnew System::EventHandler( this, &Form1::WebBrowser1_StatusTextChanged );
this->WebBrowser1->CanGoBackChanged += gcnew System::EventHandler( this, &Form1::WebBrowser1_CanGoBackChanged );
this->WebBrowser1->Navigated += gcnew System::Windows::Forms::WebBrowserNavigatedEventHandler( this, &Form1::WebBrowser1_Navigated );
this->WebBrowser1->CanGoForwardChanged += gcnew System::EventHandler( this, &Form1::WebBrowser1_CanGoForwardChanged );
this->WebBrowser1->DocumentTitleChanged += gcnew System::EventHandler( this, &Form1::WebBrowser1_DocumentTitleChanged );
//
// StatusBar1
//
this->StatusBar1->Location = System::Drawing::Point( 0, 413 );
this->StatusBar1->Name = "StatusBar1";
this->StatusBar1->Size = System::Drawing::Size( 624, 16 );
this->StatusBar1->TabIndex = 12;
//
// Form1
//
this->ClientSize = System::Drawing::Size( 624, 429 );
this->Controls->Add( this->WebBrowser1 );
this->Controls->Add( this->Panel1 );
this->Controls->Add( this->StatusBar1 );
this->Menu = this->MainMenu1;
this->Name = "Form1";
this->Text = "WebBrowser Example";
this->Panel1->ResumeLayout( false );
this->ResumeLayout( false );
}
internal:
static property Form1^ GetInstance
{
Form1^ get()
{
if ( m_DefaultInstance == nullptr || m_DefaultInstance->IsDisposed )
{
System::Threading::Monitor::Enter( Form1::typeid );
try
{
if ( m_DefaultInstance == nullptr || m_DefaultInstance->IsDisposed )
{
m_DefaultInstance = gcnew Form1;
}
}
finally
{
System::Threading::Monitor::Exit( Form1::typeid );
}
}
return m_DefaultInstance;
}
}
private:
static Form1^ m_DefaultInstance;
// Displays the Save dialog box.
void MenuItemFileSaveAs_Click( System::Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
this->WebBrowser1->ShowSaveAsDialog();
}
// Displays the Page Setup dialog box.
void MenuItemFilePageSetup_Click( System::Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
this->WebBrowser1->ShowPageSetupDialog();
}
// Displays the Print dialog box.
void MenuItemFilePrint_Click( System::Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
this->WebBrowser1->ShowPrintDialog();
}
// Displays the Print Preview dialog box.
void MenuItemFilePrintPreview_Click( System::Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
this->WebBrowser1->ShowPrintPreviewDialog();
}
// Displays the Properties dialog box.
void MenuItemFileProperties_Click( System::Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
this->WebBrowser1->ShowPropertiesDialog();
}
// Navigates to the URL in the address text box when
// the ENTER key is pressed while the text box has focus.
void TextBoxAddress_KeyDown( Object^ /*sender*/, System::Windows::Forms::KeyEventArgs^ e )
{
if ( e->KeyCode == System::Windows::Forms::Keys::Enter && !this->TextBoxAddress->Text->Equals( "" ) )
{
this->WebBrowser1->Navigate( this->TextBoxAddress->Text );
}
}
// Navigates to the URL in the address text box when
// the Go button is clicked.
void ButtonGo_Click( System::Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
if ( !this->TextBoxAddress->Text->Equals( "" ) )
{
this->WebBrowser1->Navigate( this->TextBoxAddress->Text );
}
}
// Updates the URL in TextBoxAddress upon navigation.
void WebBrowser1_Navigated( Object^ /*sender*/, System::Windows::Forms::WebBrowserNavigatedEventArgs^ /*e*/ )
{
this->TextBoxAddress->Text = this->WebBrowser1->Url->ToString();
}
// Navigates WebBrowser1 to the previous page in the history.
void backButton_Click( System::Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
this->WebBrowser1->GoBack();
}
// Disables the Back button at the beginning of the navigation history.
void WebBrowser1_CanGoBackChanged( System::Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
this->backButton->Enabled = this->WebBrowser1->CanGoBack;
}
// Navigates WebBrowser1 to the next page in history.
void ButtonForward_Click( System::Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
this->WebBrowser1->GoForward();
}
// Disables the Forward button at the end of navigation history.
void WebBrowser1_CanGoForwardChanged( System::Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
this->ButtonForward->Enabled = this->WebBrowser1->CanGoForward;
}
// Halts the current navigation and any sounds or animations on
// the page.
void ButtonStop_Click( System::Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
this->WebBrowser1->Stop();
}
// Reloads the current page.
void ButtonRefresh_Click( System::Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
// Skip refresh if about:blank is loaded to avoid removing
// content specified by the DocumentText property.
if ( !this->WebBrowser1->Url->Equals( "about:blank" ) )
{
this->WebBrowser1->Refresh();
}
}
// Navigates WebBrowser1 to the home page of the current user.
void ButtonHome_Click( System::Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
this->WebBrowser1->GoHome();
}
// Navigates WebBrowser1 to the search page of the current user.
void ButtonSearch_Click( System::Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
this->WebBrowser1->GoSearch();
}
// Prints the current document using the current print settings.
void ButtonPrint_Click( System::Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
this->WebBrowser1->Print();
}
// Updates StatusBar1 with the current browser status text.
void WebBrowser1_StatusTextChanged( Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
this->StatusBar1->Text = WebBrowser1->StatusText;
}
// Updates the title bar with the current document title.
void WebBrowser1_DocumentTitleChanged( Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
this->Text = WebBrowser1->DocumentTitle;
}
};
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
int main()
{
System::Windows::Forms::Application::Run( gcnew Form1 );
}
using System;
using System.Windows.Forms;
using System.Security.Permissions;
public class Form1 : Form
{
public Form1()
{
// Create the form layout. If you are using Visual Studio,
// you can replace this code with code generated by the designer.
InitializeForm();
// The following events are not visible in the designer, so
// you must associate them with their event-handlers in code.
webBrowser1.CanGoBackChanged +=
new EventHandler(webBrowser1_CanGoBackChanged);
webBrowser1.CanGoForwardChanged +=
new EventHandler(webBrowser1_CanGoForwardChanged);
webBrowser1.DocumentTitleChanged +=
new EventHandler(webBrowser1_DocumentTitleChanged);
webBrowser1.StatusTextChanged +=
new EventHandler(webBrowser1_StatusTextChanged);
// Load the user's home page.
webBrowser1.GoHome();
}
// Displays the Save dialog box.
private void saveAsToolStripMenuItem_Click(object sender, EventArgs e)
{
webBrowser1.ShowSaveAsDialog();
}
// Displays the Page Setup dialog box.
private void pageSetupToolStripMenuItem_Click(object sender, EventArgs e)
{
webBrowser1.ShowPageSetupDialog();
}
// Displays the Print dialog box.
private void printToolStripMenuItem_Click(object sender, EventArgs e)
{
webBrowser1.ShowPrintDialog();
}
// Displays the Print Preview dialog box.
private void printPreviewToolStripMenuItem_Click(
object sender, EventArgs e)
{
webBrowser1.ShowPrintPreviewDialog();
}
// Displays the Properties dialog box.
private void propertiesToolStripMenuItem_Click(
object sender, EventArgs e)
{
webBrowser1.ShowPropertiesDialog();
}
// Selects all the text in the text box when the user clicks it.
private void toolStripTextBox1_Click(object sender, EventArgs e)
{
toolStripTextBox1.SelectAll();
}
// Navigates to the URL in the address box when
// the ENTER key is pressed while the ToolStripTextBox has focus.
private void toolStripTextBox1_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Enter)
{
Navigate(toolStripTextBox1.Text);
}
}
// Navigates to the URL in the address box when
// the Go button is clicked.
private void goButton_Click(object sender, EventArgs e)
{
Navigate(toolStripTextBox1.Text);
}
// Navigates to the given URL if it is valid.
private void Navigate(String address)
{
if (String.IsNullOrEmpty(address)) return;
if (address.Equals("about:blank")) return;
if (!address.StartsWith("http://") &&
!address.StartsWith("https://"))
{
address = "http://" + address;
}
try
{
webBrowser1.Navigate(new Uri(address));
}
catch (System.UriFormatException)
{
return;
}
}
// Updates the URL in TextBoxAddress upon navigation.
private void webBrowser1_Navigated(object sender,
WebBrowserNavigatedEventArgs e)
{
toolStripTextBox1.Text = webBrowser1.Url.ToString();
}
// Navigates webBrowser1 to the previous page in the history.
private void backButton_Click(object sender, EventArgs e)
{
webBrowser1.GoBack();
}
// Disables the Back button at the beginning of the navigation history.
private void webBrowser1_CanGoBackChanged(object sender, EventArgs e)
{
backButton.Enabled = webBrowser1.CanGoBack;
}
// Navigates webBrowser1 to the next page in history.
private void forwardButton_Click(object sender, EventArgs e)
{
webBrowser1.GoForward();
}
// Disables the Forward button at the end of navigation history.
private void webBrowser1_CanGoForwardChanged(object sender, EventArgs e)
{
forwardButton.Enabled = webBrowser1.CanGoForward;
}
// Halts the current navigation and any sounds or animations on
// the page.
private void stopButton_Click(object sender, EventArgs e)
{
webBrowser1.Stop();
}
// Reloads the current page.
private void refreshButton_Click(object sender, EventArgs e)
{
// Skip refresh if about:blank is loaded to avoid removing
// content specified by the DocumentText property.
if (!webBrowser1.Url.Equals("about:blank"))
{
webBrowser1.Refresh();
}
}
// Navigates webBrowser1 to the home page of the current user.
private void homeButton_Click(object sender, EventArgs e)
{
webBrowser1.GoHome();
}
// Navigates webBrowser1 to the search page of the current user.
private void searchButton_Click(object sender, EventArgs e)
{
webBrowser1.GoSearch();
}
// Prints the current document using the current print settings.
private void printButton_Click(object sender, EventArgs e)
{
webBrowser1.Print();
}
// Updates the status bar with the current browser status text.
private void webBrowser1_StatusTextChanged(object sender, EventArgs e)
{
toolStripStatusLabel1.Text = webBrowser1.StatusText;
}
// Updates the title bar with the current document title.
private void webBrowser1_DocumentTitleChanged(object sender, EventArgs e)
{
this.Text = webBrowser1.DocumentTitle;
}
// Exits the application.
private void exitToolStripMenuItem_Click(object sender, EventArgs e)
{
Application.Exit();
}
// The remaining code in this file provides basic form initialization and
// includes a Main method. If you use the Visual Studio designer to create
// your form, you can use the designer generated code instead of this code,
// but be sure to use the names shown in the variable declarations here,
// and be sure to attach the event handlers to the associated events.
private WebBrowser webBrowser1;
private MenuStrip menuStrip1;
private ToolStripMenuItem fileToolStripMenuItem,
saveAsToolStripMenuItem, printToolStripMenuItem,
printPreviewToolStripMenuItem, exitToolStripMenuItem,
pageSetupToolStripMenuItem, propertiesToolStripMenuItem;
private ToolStripSeparator toolStripSeparator1, toolStripSeparator2;
private ToolStrip toolStrip1, toolStrip2;
private ToolStripTextBox toolStripTextBox1;
private ToolStripButton goButton, backButton,
forwardButton, stopButton, refreshButton,
homeButton, searchButton, printButton;
private StatusStrip statusStrip1;
private ToolStripStatusLabel toolStripStatusLabel1;
private void InitializeForm()
{
webBrowser1 = new WebBrowser();
menuStrip1 = new MenuStrip();
fileToolStripMenuItem = new ToolStripMenuItem();
saveAsToolStripMenuItem = new ToolStripMenuItem();
toolStripSeparator1 = new ToolStripSeparator();
printToolStripMenuItem = new ToolStripMenuItem();
printPreviewToolStripMenuItem = new ToolStripMenuItem();
toolStripSeparator2 = new ToolStripSeparator();
exitToolStripMenuItem = new ToolStripMenuItem();
pageSetupToolStripMenuItem = new ToolStripMenuItem();
propertiesToolStripMenuItem = new ToolStripMenuItem();
toolStrip1 = new ToolStrip();
goButton = new ToolStripButton();
backButton = new ToolStripButton();
forwardButton = new ToolStripButton();
stopButton = new ToolStripButton();
refreshButton = new ToolStripButton();
homeButton = new ToolStripButton();
searchButton = new ToolStripButton();
printButton = new ToolStripButton();
toolStrip2 = new ToolStrip();
toolStripTextBox1 = new ToolStripTextBox();
statusStrip1 = new StatusStrip();
toolStripStatusLabel1 = new ToolStripStatusLabel();
menuStrip1.Items.Add(fileToolStripMenuItem);
fileToolStripMenuItem.DropDownItems.AddRange(
new ToolStripItem[] {
saveAsToolStripMenuItem, toolStripSeparator1,
pageSetupToolStripMenuItem, printToolStripMenuItem,
printPreviewToolStripMenuItem, toolStripSeparator2,
propertiesToolStripMenuItem, exitToolStripMenuItem
});
fileToolStripMenuItem.Text = "&File";
saveAsToolStripMenuItem.Text = "Save &As...";
pageSetupToolStripMenuItem.Text = "Page Set&up...";
printToolStripMenuItem.Text = "&Print...";
printPreviewToolStripMenuItem.Text = "Print Pre&view...";
propertiesToolStripMenuItem.Text = "Properties";
exitToolStripMenuItem.Text = "E&xit";
printToolStripMenuItem.ShortcutKeys = Keys.Control | Keys.P;
saveAsToolStripMenuItem.Click +=
new System.EventHandler(saveAsToolStripMenuItem_Click);
pageSetupToolStripMenuItem.Click +=
new System.EventHandler(pageSetupToolStripMenuItem_Click);
printToolStripMenuItem.Click +=
new System.EventHandler(printToolStripMenuItem_Click);
printPreviewToolStripMenuItem.Click +=
new System.EventHandler(printPreviewToolStripMenuItem_Click);
propertiesToolStripMenuItem.Click +=
new System.EventHandler(propertiesToolStripMenuItem_Click);
exitToolStripMenuItem.Click +=
new System.EventHandler(exitToolStripMenuItem_Click);
toolStrip1.Items.AddRange(new ToolStripItem[] {
goButton, backButton, forwardButton, stopButton,
refreshButton, homeButton, searchButton, printButton});
goButton.Text = "Go";
backButton.Text = "Back";
forwardButton.Text = "Forward";
stopButton.Text = "Stop";
refreshButton.Text = "Refresh";
homeButton.Text = "Home";
searchButton.Text = "Search";
printButton.Text = "Print";
backButton.Enabled = false;
forwardButton.Enabled = false;
goButton.Click += new System.EventHandler(goButton_Click);
backButton.Click += new System.EventHandler(backButton_Click);
forwardButton.Click += new System.EventHandler(forwardButton_Click);
stopButton.Click += new System.EventHandler(stopButton_Click);
refreshButton.Click += new System.EventHandler(refreshButton_Click);
homeButton.Click += new System.EventHandler(homeButton_Click);
searchButton.Click += new System.EventHandler(searchButton_Click);
printButton.Click += new System.EventHandler(printButton_Click);
toolStrip2.Items.Add(toolStripTextBox1);
toolStripTextBox1.Size = new System.Drawing.Size(250, 25);
toolStripTextBox1.KeyDown +=
new KeyEventHandler(toolStripTextBox1_KeyDown);
toolStripTextBox1.Click +=
new System.EventHandler(toolStripTextBox1_Click);
statusStrip1.Items.Add(toolStripStatusLabel1);
webBrowser1.Dock = DockStyle.Fill;
webBrowser1.Navigated +=
new WebBrowserNavigatedEventHandler(webBrowser1_Navigated);
Controls.AddRange(new Control[] {
webBrowser1, toolStrip2, toolStrip1,
menuStrip1, statusStrip1, menuStrip1 });
}
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.Run(new Form1());
}
}
Imports System.Windows.Forms
Imports System.Security.Permissions
Public Class Form1
Inherits Form
Public Sub New()
' Create the form layout. If you are using Visual Studio,
' you can replace this code with code generated by the designer.
InitializeForm()
' Load the user's home page.
webBrowser1.GoHome()
End Sub
' Displays the Save dialog box.
Private Sub saveAsToolStripMenuItem_Click( _
ByVal sender As Object, ByVal e As EventArgs) _
Handles saveAsToolStripMenuItem.Click
webBrowser1.ShowSaveAsDialog()
End Sub
' Displays the Page Setup dialog box.
Private Sub pageSetupToolStripMenuItem_Click( _
ByVal sender As Object, ByVal e As EventArgs) _
Handles pageSetupToolStripMenuItem.Click
webBrowser1.ShowPageSetupDialog()
End Sub
' Displays the Print dialog box.
Private Sub printToolStripMenuItem_Click( _
ByVal sender As Object, ByVal e As EventArgs) _
Handles printToolStripMenuItem.Click
webBrowser1.ShowPrintDialog()
End Sub
' Displays the Print Preview dialog box.
Private Sub printPreviewToolStripMenuItem_Click( _
ByVal sender As Object, ByVal e As EventArgs) _
Handles printPreviewToolStripMenuItem.Click
webBrowser1.ShowPrintPreviewDialog()
End Sub
' Displays the Properties dialog box.
Private Sub propertiesToolStripMenuItem_Click( _
ByVal sender As Object, ByVal e As EventArgs) _
Handles propertiesToolStripMenuItem.Click
webBrowser1.ShowPropertiesDialog()
End Sub
' Selects all the text in the text box when the user clicks it.
Private Sub toolStripTextBox1_Click( _
ByVal sender As Object, ByVal e As EventArgs) _
Handles toolStripTextBox1.Click
toolStripTextBox1.SelectAll()
End Sub
' Navigates to the URL in the address box when
' the ENTER key is pressed while the ToolStripTextBox has focus.
Private Sub toolStripTextBox1_KeyDown( _
ByVal sender As Object, ByVal e As KeyEventArgs) _
Handles toolStripTextBox1.KeyDown
If (e.KeyCode = Keys.Enter) Then
Navigate(toolStripTextBox1.Text)
End If
End Sub
' Navigates to the URL in the address box when
' the Go button is clicked.
Private Sub goButton_Click( _
ByVal sender As Object, ByVal e As EventArgs) _
Handles goButton.Click
Navigate(toolStripTextBox1.Text)
End Sub
' Navigates to the given URL if it is valid.
Private Sub Navigate(ByVal address As String)
If String.IsNullOrEmpty(address) Then Return
If address.Equals("about:blank") Then Return
If Not address.StartsWith("http://") And _
Not address.StartsWith("https://") Then
address = "http://" & address
End If
Try
webBrowser1.Navigate(New Uri(address))
Catch ex As System.UriFormatException
Return
End Try
End Sub
' Updates the URL in TextBoxAddress upon navigation.
Private Sub webBrowser1_Navigated(ByVal sender As Object, _
ByVal e As WebBrowserNavigatedEventArgs) _
Handles webBrowser1.Navigated
toolStripTextBox1.Text = webBrowser1.Url.ToString()
End Sub
' Navigates webBrowser1 to the previous page in the history.
Private Sub backButton_Click( _
ByVal sender As Object, ByVal e As EventArgs) _
Handles backButton.Click
webBrowser1.GoBack()
End Sub
' Disables the Back button at the beginning of the navigation history.
Private Sub webBrowser1_CanGoBackChanged( _
ByVal sender As Object, ByVal e As EventArgs) _
Handles webBrowser1.CanGoBackChanged
backButton.Enabled = webBrowser1.CanGoBack
End Sub
' Navigates webBrowser1 to the next page in history.
Private Sub forwardButton_Click( _
ByVal sender As Object, ByVal e As EventArgs) _
Handles forwardButton.Click
webBrowser1.GoForward()
End Sub
' Disables the Forward button at the end of navigation history.
Private Sub webBrowser1_CanGoForwardChanged( _
ByVal sender As Object, ByVal e As EventArgs) _
Handles webBrowser1.CanGoForwardChanged
forwardButton.Enabled = webBrowser1.CanGoForward
End Sub
' Halts the current navigation and any sounds or animations on
' the page.
Private Sub stopButton_Click( _
ByVal sender As Object, ByVal e As EventArgs) _
Handles stopButton.Click
webBrowser1.Stop()
End Sub
' Reloads the current page.
Private Sub refreshButton_Click( _
ByVal sender As Object, ByVal e As EventArgs) _
Handles refreshButton.Click
' Skip refresh if about:blank is loaded to avoid removing
' content specified by the DocumentText property.
If Not webBrowser1.Url.Equals("about:blank") Then
webBrowser1.Refresh()
End If
End Sub
' Navigates webBrowser1 to the home page of the current user.
Private Sub homeButton_Click( _
ByVal sender As Object, ByVal e As EventArgs) _
Handles homeButton.Click
webBrowser1.GoHome()
End Sub
' Navigates webBrowser1 to the search page of the current user.
Private Sub searchButton_Click( _
ByVal sender As Object, ByVal e As EventArgs) _
Handles searchButton.Click
webBrowser1.GoSearch()
End Sub
' Prints the current document Imports the current print settings.
Private Sub printButton_Click( _
ByVal sender As Object, ByVal e As EventArgs) _
Handles printButton.Click
webBrowser1.Print()
End Sub
' Updates the status bar with the current browser status text.
Private Sub webBrowser1_StatusTextChanged( _
ByVal sender As Object, ByVal e As EventArgs) _
Handles webBrowser1.StatusTextChanged
toolStripStatusLabel1.Text = webBrowser1.StatusText
End Sub
' Updates the title bar with the current document title.
Private Sub webBrowser1_DocumentTitleChanged( _
ByVal sender As Object, ByVal e As EventArgs) _
Handles webBrowser1.DocumentTitleChanged
Me.Text = webBrowser1.DocumentTitle
End Sub
' Exits the application.
Private Sub exitToolStripMenuItem_Click( _
ByVal sender As Object, ByVal e As EventArgs) _
Handles exitToolStripMenuItem.Click
Application.Exit()
End Sub
' The remaining code in this file provides basic form initialization and
' includes a Main method. If you use the Visual Studio designer to create
' your form, you can use the designer generated code instead of this code,
' but be sure to use the names shown in the variable declarations here.
Private WithEvents webBrowser1 As WebBrowser
Private menuStrip1 As MenuStrip
Private WithEvents fileToolStripMenuItem, saveAsToolStripMenuItem, _
printToolStripMenuItem, printPreviewToolStripMenuItem, _
exitToolStripMenuItem, pageSetupToolStripMenuItem, _
propertiesToolStripMenuItem As ToolStripMenuItem
Private toolStripSeparator1, toolStripSeparator2 As ToolStripSeparator
Private toolStrip1, toolStrip2 As ToolStrip
Private WithEvents toolStripTextBox1 As ToolStripTextBox
Private WithEvents goButton, backButton, forwardButton, _
stopButton, refreshButton, homeButton, _
searchButton, printButton As ToolStripButton
Private statusStrip1 As StatusStrip
Private toolStripStatusLabel1 As ToolStripStatusLabel
Private Sub InitializeForm()
webBrowser1 = New WebBrowser()
menuStrip1 = New MenuStrip()
fileToolStripMenuItem = New ToolStripMenuItem()
saveAsToolStripMenuItem = New ToolStripMenuItem()
toolStripSeparator1 = New ToolStripSeparator()
printToolStripMenuItem = New ToolStripMenuItem()
printPreviewToolStripMenuItem = New ToolStripMenuItem()
toolStripSeparator2 = New ToolStripSeparator()
exitToolStripMenuItem = New ToolStripMenuItem()
pageSetupToolStripMenuItem = New ToolStripMenuItem()
propertiesToolStripMenuItem = New ToolStripMenuItem()
toolStrip1 = New ToolStrip()
goButton = New ToolStripButton()
backButton = New ToolStripButton()
forwardButton = New ToolStripButton()
stopButton = New ToolStripButton()
refreshButton = New ToolStripButton()
homeButton = New ToolStripButton()
searchButton = New ToolStripButton()
printButton = New ToolStripButton()
toolStrip2 = New ToolStrip()
toolStripTextBox1 = New ToolStripTextBox()
statusStrip1 = New StatusStrip()
toolStripStatusLabel1 = New ToolStripStatusLabel()
webBrowser1.Dock = DockStyle.Fill
menuStrip1.Items.Add(fileToolStripMenuItem)
fileToolStripMenuItem.DropDownItems.AddRange( _
New ToolStripItem() { _
saveAsToolStripMenuItem, toolStripSeparator1, _
pageSetupToolStripMenuItem, printToolStripMenuItem, _
printPreviewToolStripMenuItem, toolStripSeparator2, _
propertiesToolStripMenuItem, exitToolStripMenuItem _
})
fileToolStripMenuItem.Text = "&File"
saveAsToolStripMenuItem.Text = "Save &As..."
pageSetupToolStripMenuItem.Text = "Page Set&up..."
printToolStripMenuItem.Text = "&Print..."
printPreviewToolStripMenuItem.Text = "Print Pre&view..."
propertiesToolStripMenuItem.Text = "Properties"
exitToolStripMenuItem.Text = "E&xit"
printToolStripMenuItem.ShortcutKeys = Keys.Control Or Keys.P
toolStrip1.Items.AddRange(New ToolStripItem() { _
goButton, backButton, forwardButton, stopButton, _
refreshButton, homeButton, searchButton, printButton})
goButton.Text = "Go"
backButton.Text = "Back"
forwardButton.Text = "Forward"
stopButton.Text = "Stop"
refreshButton.Text = "Refresh"
homeButton.Text = "Home"
searchButton.Text = "Search"
printButton.Text = "Print"
backButton.Enabled = False
forwardButton.Enabled = False
toolStrip2.Items.Add(toolStripTextBox1)
toolStripTextBox1.Size = New System.Drawing.Size(250, 25)
statusStrip1.Items.Add(toolStripStatusLabel1)
Controls.AddRange(New Control() { _
webBrowser1, toolStrip2, toolStrip1, _
menuStrip1, statusStrip1, menuStrip1})
End Sub
<STAThread()> _
Public Shared Sub Main()
Application.EnableVisualStyles()
Application.Run(New Form1())
End Sub
End Class
Компиляция кода
Для этого примера требуются:
- ссылки на сборки
System,System.DrawingиSystem.Windows.Forms.
См. также
Совместная работа с нами на GitHub
Источник этого содержимого можно найти на GitHub, где также можно создавать и просматривать проблемы и запросы на вытягивание. Дополнительные сведения см. в нашем руководстве для участников.
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