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IWebBrowser Interface

Version 104.4.240
ChromiumWebBrowser implementations implement this interface. Can be cast to the concrete implementation to access UI specific features.

Namespace:  CefSharp
Assembly:  CefSharp (in CefSharp.dll) Version: 104.4.240.0 (104.4.240.0)
Syntax
public interface IWebBrowser : IChromiumWebBrowserBase, 
	IDisposable

The IWebBrowser type exposes the following members.

Properties
  NameDescription
Public propertyAddress
The address (URL) which the browser control is currently displaying. Will automatically be updated as the user navigates to another page (e.g. by clicking on a link).
(Inherited from IChromiumWebBrowserBase.)
Public propertyAudioHandler
Implement IAudioHandler to handle audio events.
Public propertyBrowserCore
Returns the current IBrowser Instance or null. IBrowser is the the underlying CefBrowser instance and provides access to frames/browserhost etc.
(Inherited from IChromiumWebBrowserBase.)
Public propertyCanExecuteJavascriptInMainFrame
A flag that indicates if you can execute javascript in the main frame. Flag is set to true in IRenderProcessMessageHandler.OnContextCreated. and false in IRenderProcessMessageHandler.OnContextReleased
Public propertyCanGoBack
A flag that indicates whether the state of the control current supports the GoBack action (true) or not (false).
(Inherited from IChromiumWebBrowserBase.)
Public propertyCanGoForward
A flag that indicates whether the state of the control currently supports the GoForward action (true) or not (false).
(Inherited from IChromiumWebBrowserBase.)
Public propertyDialogHandler
Implement IDialogHandler and assign to handle dialog events.
Public propertyDisplayHandler
Implement IDisplayHandler and assign to handle events related to browser display state.
Public propertyDownloadHandler
Implement IDownloadHandler and assign to handle events related to downloading files.
Public propertyDragHandler
Implement IDragHandler and assign to handle events related to dragging.
Public propertyFindHandler
Implement IFindHandler to handle events related to find results.
Public propertyFocusHandler
Implement IFocusHandler and assign to handle events related to the browser component's focus
Public propertyFrameHandler
Implement IFrameHandler to handle frame events.
Public propertyIsBrowserInitialized
A flag that indicates whether the WebBrowser is initialized (true) or not (false).
(Inherited from IChromiumWebBrowserBase.)
Public propertyIsDisposed
A flag that indicates whether the WebBrowser has been disposed () or not ()
(Inherited from IChromiumWebBrowserBase.)
Public propertyIsLoading
A flag that indicates whether the control is currently loading one or more web pages (true) or not (false).
(Inherited from IChromiumWebBrowserBase.)
Public propertyJavascriptObjectRepository
The javascript object repository, one repository per ChromiumWebBrowser instance.
Public propertyJsDialogHandler
Implement IJsDialogHandler and assign to handle events related to JavaScript Dialogs.
Public propertyKeyboardHandler
Implement IKeyboardHandler and assign to handle events related to key press.
Public propertyLifeSpanHandler
Implement ILifeSpanHandler and assign to handle events related to popups.
Public propertyLoadHandler
Implement ILoadHandler and assign to handle events related to browser load status.
Public propertyMenuHandler
Implement IContextMenuHandler and assign to handle events related to the browser context menu
Public propertyPermissionHandler
Implement IPermissionHandler to handle events related to permission requests.
Public propertyRenderProcessMessageHandler
Implement IRenderProcessMessageHandler and assign to handle messages from the render process.
Public propertyRequestContext
Gets the custom request context assigned to this browser instance If no instance was assigned this will be null and the global request context will have been used for this browser. You can access the global request context through Cef.GetGlobalRequestContext()
Public propertyRequestHandler
Implement IRequestHandler and assign to handle events related to browser requests.
Public propertyResourceRequestHandlerFactory
Implement IResourceRequestHandlerFactory and control the loading of resources
Public propertyTooltipText
The text that will be displayed as a ToolTip
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Methods
  NameDescription
Public methodDispose
Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
(Inherited from IDisposable.)
Public methodFocus
Attempts to give focus to the IWebBrowser control.
(Inherited from IChromiumWebBrowserBase.)
Public methodGetBrowser
Returns the current CEF Browser Instance
Public methodGetContentSizeAsync
Size of scrollable area in CSS pixels
Public methodLoad
Loads the specified url in the Main Frame. If [!:IsDisposed] is true then the method call will be ignored. Same as calling [!:LoadUrl(string)]
Public methodLoadUrl
Loads the specified url in the Main Frame. Same as calling [!:Load(string)]
(Inherited from IChromiumWebBrowserBase.)
Public methodLoadUrlAsync
Load the url in the main frame of the browser
(Inherited from IChromiumWebBrowserBase.)
Public methodTryGetBrowserCoreById
Try and get a reference to the IBrowser instance that matches the browserId. Primarily used for geting a reference to the IBrowser used by popups.
Public methodWaitForInitialLoadAsync
Wait for the Browser to finish loading the initial web page.
Public methodCode exampleWaitForNavigationAsync
This resolves when the browser navigates to a new URL or reloads. It is useful for when you run code which will indirectly cause the browser to navigate. A common use case would be when executing javascript that results in a navigation. e.g. clicks a link This must be called before executing the action that navigates the browser. It may not resolve correctly if called after.
(Inherited from IChromiumWebBrowserBase.)
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Events
  NameDescription
Public eventConsoleMessage
Event handler for receiving Javascript console messages being sent from web pages. It's important to note this event is fired on a CEF UI thread, which by default is not the same as your application UI thread. It is unwise to block on this thread for any length of time as your browser will become unresponsive and/or hang.. To access UI elements you'll need to Invoke/Dispatch onto the UI Thread. (The exception to this is when you're running with settings.MultiThreadedMessageLoop = false, then they'll be the same thread).
(Inherited from IChromiumWebBrowserBase.)
Public eventFrameLoadEnd
Event handler that will get called when the browser is done loading a frame. Multiple frames may be loading at the same time. Sub-frames may start or continue loading after the main frame load has ended. This method will always be called for all frames irrespective of whether the request completes successfully. It's important to note this event is fired on a CEF UI thread, which by default is not the same as your application UI thread. It is unwise to block on this thread for any length of time as your browser will become unresponsive and/or hang.. To access UI elements you'll need to Invoke/Dispatch onto the UI Thread.
(Inherited from IChromiumWebBrowserBase.)
Public eventFrameLoadStart
Event handler that will get called when the browser begins loading a frame. Multiple frames may be loading at the same time. Sub-frames may start or continue loading after the main frame load has ended. This method may not be called for a particular frame if the load request for that frame fails. For notification of overall browser load status use OnLoadingStateChange instead. It's important to note this event is fired on a CEF UI thread, which by default is not the same as your application UI thread. It is unwise to block on this thread for any length of time as your browser will become unresponsive and/or hang.. To access UI elements you'll need to Invoke/Dispatch onto the UI Thread.
(Inherited from IChromiumWebBrowserBase.)
Public eventJavascriptMessageReceived
Event handler that will get called when the message that originates from CefSharp.PostMessage
Public eventLoadError
Event handler that will get called when the resource load for a navigation fails or is canceled. It's important to note this event is fired on a CEF UI thread, which by default is not the same as your application UI thread. It is unwise to block on this thread for any length of time as your browser will become unresponsive and/or hang.. To access UI elements you'll need to Invoke/Dispatch onto the UI Thread.
(Inherited from IChromiumWebBrowserBase.)
Public eventLoadingStateChanged
Event handler that will get called when the Loading state has changed. This event will be fired twice. Once when loading is initiated either programmatically or by user action, and once when loading is terminated due to completion, cancellation of failure. It's important to note this event is fired on a CEF UI thread, which by default is not the same as your application UI thread. It is unwise to block on this thread for any length of time as your browser will become unresponsive and/or hang.. To access UI elements you'll need to Invoke/Dispatch onto the UI Thread.
(Inherited from IChromiumWebBrowserBase.)
Public eventStatusMessage
Event handler for changes to the status message. It's important to note this event is fired on a CEF UI thread, which by default is not the same as your application UI thread. It is unwise to block on this thread for any length of time as your browser will become unresponsive and/or hang. To access UI elements you'll need to Invoke/Dispatch onto the UI Thread. (The exception to this is when you're running with settings.MultiThreadedMessageLoop = false, then they'll be the same thread).
(Inherited from IChromiumWebBrowserBase.)
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Extension Methods
  NameDescription
Public Extension MethodAddWordToDictionary
Add the specified word to the spelling dictionary.
(Defined by WebBrowserExtensions.)
Public Extension MethodBack
Navigates back, must check CanGoBack before calling this method.
(Defined by WebBrowserExtensions.)
Public Extension MethodCloseDevTools
Explicitly close the developer tools window if one exists for this browser instance.
(Defined by WebBrowserExtensions.)
Public Extension MethodCopy
Execute Copy on the focused frame.
(Defined by WebBrowserExtensions.)
Public Extension MethodCut
Execute Cut on the focused frame.
(Defined by WebBrowserExtensions.)
Public Extension MethodDelete
Execute Delete on the focused frame.
(Defined by WebBrowserExtensions.)
Public Extension MethodCode exampleDestroyWindow
Manually call https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-destroywindow passing in the handle returned from GetWindowHandle. This method can be used to manually close the underlying CefBrowser instance. This will avoid the WM_Close message that CEF sends by default to the top level window. (Which closes your application). This method should generally only be used in the WinForms version.
(Defined by WebBrowserExtensions.)
Public Extension MethodEnsureObjectBoundAsync
Make sure an object is bound in javascript. Executes against the main frame
(Defined by JavascriptBindingExtensions.)
Public Extension MethodEvaluateScriptAsPromiseAsync
Evaluate Javascript in the context of the MainFrame of the ChromiumWebBrowser. The script will be executed asynchronously and the method returns a Task encapsulating the response from the Javascript. The result of the script execution in javascript is Promise.resolve so even no promise values will be treated as a promise. Your javascript should return a value. The javascript will be wrapped in an Immediately Invoked Function Expression. When the promise either trigger then/catch this returned Task will be completed.
(Defined by WebBrowserExtensions.)
Public Extension MethodEvaluateScriptAsync(String, Object)Overloaded.
Evaluate some Javascript code in the context of this WebBrowser. The script will be executed asynchronously and the method returns a Task encapsulating the response from the Javascript This simple helper extension will encapsulate params in single quotes (unless int, uint, etc)
(Defined by WebBrowserExtensions.)
Public Extension MethodEvaluateScriptAsync(String, NullableTimeSpan, Boolean)Overloaded.
Evaluate Javascript in the context of this Browsers Main Frame. The script will be executed asynchronously and the method returns a Task encapsulating the response from the Javascript
(Defined by WebBrowserExtensions.)
Public Extension MethodEvaluateScriptAsync(NullableTimeSpan, String, Object)Overloaded.
Evaluate Javascript code in the context of this WebBrowser using the specified timeout. The script will be executed asynchronously and the method returns a Task encapsulating the response from the Javascript This simple helper extension will encapsulate params in single quotes (unless int, uint, etc).
(Defined by WebBrowserExtensions.)
Public Extension MethodExecuteDevToolsMethodAsync
Execute a method call over the DevTools protocol. This is a more structured version of SendDevToolsMessage. ExecuteDevToolsMethod(IBrowserHost, Int32, String, JsonString) can only be called on the CEF UI Thread, this method can be called on any thread. See the DevTools protocol documentation at https://chromedevtools.github.io/devtools-protocol/ for details of supported methods and the expected parameters dictionary contents. See the SendDevToolsMessage documentation for additional usage information.
(Defined by DevToolsExtensions.)
Public Extension MethodExecuteScriptAsync(String)Overloaded.
Execute Javascript in the context of this Browsers Main Frame. As the method name implies, the script will be executed asynchronously, and the method therefore returns before the script has actually been executed.
(Defined by WebBrowserExtensions.)
Public Extension MethodExecuteScriptAsync(String, Object)Overloaded.
Execute Javascript code in the context of this Browser. As the method name implies, the script will be executed asynchronously, and the method therefore returns before the script has actually been executed. This simple helper extension will encapsulate params in single quotes (unless int, uint, etc)
(Defined by WebBrowserExtensions.)
Public Extension MethodExecuteScriptAsyncWhenPageLoaded
Execute Javascript code in the context of this Browsers Main Frame. This extension method uses the LoadingStateChanged event. As the method name implies, the script will be executed asynchronously, and the method therefore returns before the script has actually been executed.
(Defined by WebBrowserExtensions.)
Public Extension MethodFind
Search for text within the current page.
(Defined by WebBrowserExtensions.)
Public Extension MethodForward
Navigates forward, must check CanGoForward before calling this method.
(Defined by WebBrowserExtensions.)
Public Extension MethodGetBrowserHost
Shortcut method to get the browser IBrowserHost.
(Defined by WebBrowserExtensions.)
Public Extension MethodGetCookieManager
Gets the default cookie manager associated with the IChromiumWebBrowserBase instance.
(Defined by WebBrowserExtensions.)
Public Extension MethodGetDevToolsClient
Gets a new Instance of the DevTools client for the chromiumWebBrowser instance.
(Defined by DevToolsExtensions.)
Public Extension MethodGetFocusedFrame
Returns the focused frame for the browser window.
(Defined by WebBrowserExtensions.)
Public Extension MethodGetMainFrame
Returns the main (top-level) frame for the browser window.
(Defined by WebBrowserExtensions.)
Public Extension MethodGetRequestContext
Gets the RequestContext associated with the IChromiumWebBrowserBase instance.
(Defined by WebBrowserExtensions.)
Public Extension MethodGetSourceAsync (Defined by WebBrowserExtensions.)
Public Extension MethodGetTextAsync (Defined by WebBrowserExtensions.)
Public Extension MethodGetVisibleNavigationEntryAsync
Retrieve the current NavigationEntry. Contains information like HttpStatusCode and SslStatus
(Defined by WebBrowserExtensionsEx.)
Public Extension MethodGetZoomLevelAsync
Asynchronously gets the current Zoom Level.
(Defined by WebBrowserExtensions.)
Public Extension MethodLoadHtml(String, Boolean)Overloaded.
Loads html as Data Uri See https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/Data_URIs for details If base64Encode is false then html will be Uri encoded.
(Defined by WebBrowserExtensions.)
Public Extension MethodLoadHtml(String, String)Overloaded.
Registers and loads a ResourceHandler that represents the HTML content.
(Defined by WebBrowserExtensions.)
Public Extension MethodLoadHtml(String, String, Encoding, Boolean)Overloaded.
Registers and loads a ResourceHandler that represents the HTML content.
(Defined by WebBrowserExtensions.)
Public Extension MethodLoadUrlWithPostData
Creates a new instance of IRequest with the specified Url and Method = POST and then calls LoadRequest(IRequest).
(Defined by WebBrowserExtensions.)
Public Extension MethodPaste
Execute Paste on the focused frame.
(Defined by WebBrowserExtensions.)
Public Extension MethodPrint
Opens a Print Dialog which if used (can be user cancelled) will print the browser contents.
(Defined by WebBrowserExtensions.)
Public Extension MethodPrintToPdfAsync
Asynchronously prints the current browser contents to the PDF file specified. The caller is responsible for deleting the file when done.
(Defined by WebBrowserExtensions.)
Public Extension MethodRedo
Execute Redo on the focused frame.
(Defined by WebBrowserExtensions.)
Public Extension MethodRegisterAsyncJsObject

Asynchronously registers a Javascript object in this specific browser instance.

Only methods of the object will be availabe.

(Defined by WebBrowserExtensions.)
Public Extension MethodRegisterJsObject
Registers a Javascript object in this specific browser instance.
(Defined by WebBrowserExtensions.)
Public Extension MethodRegisterResourceHandler
Register a ResourceHandler. Can only be used when browser.ResourceHandlerFactory is an instance of DefaultResourceHandlerFactory.
(Defined by WebBrowserExtensions.)
Public Extension MethodReloadOverloaded.
Reloads the page being displayed. This method will use data from the browser's cache, if available.
(Defined by WebBrowserExtensions.)
Public Extension MethodReload(Boolean)Overloaded.
Reloads the page being displayed, optionally ignoring the cache (which means the whole page including all .css, .js etc. resources will be re-fetched).
(Defined by WebBrowserExtensions.)
Public Extension MethodReplaceMisspelling
If a misspelled word is currently selected in an editable node calling this method will replace it with the specified word.
(Defined by WebBrowserExtensions.)
Public Extension MethodSelectAll
Execute SelectAll on the focused frame.
(Defined by WebBrowserExtensions.)
Public Extension MethodSendMouseWheelEvent
Send a mouse wheel event to the browser.
(Defined by WebBrowserExtensions.)
Public Extension MethodSetAsPopup (Defined by WebBrowserExtensions.)
Public Extension MethodSetMainFrameDocumentContentAsync
Set the Document Content for the Main Frame using DevTools Protocol.
(Defined by DevToolsExtensions.)
Public Extension MethodSetZoomLevel
Change the ZoomLevel to the specified value. Can be set to 0.0 to clear the zoom level.
(Defined by WebBrowserExtensions.)
Public Extension MethodShowDevTools
Open developer tools in its own window.
(Defined by WebBrowserExtensions.)
Public Extension MethodShowDevToolsDocked(Control, String, DockStyle, Int32, Int32)Overloaded.
Open DevTools using parentControl as the parent control. If inspectElementAtX and/or inspectElementAtY are specified then the element at the specified (x,y) location will be inspected. For resize/moving to work correctly you will need to use the LifeSpanHandler implementation. (Set LifeSpanHandler to an instance of LifeSpanHandler)
(Defined by WebBrowserExtensions.)
Public Extension MethodShowDevToolsDocked(ActionChromiumHostControl, String, DockStyle, Int32, Int32)Overloaded.
Open DevTools using your own Control as the parent. If inspectElementAtX and/or inspectElementAtY are specified then the element at the specified (x,y) location will be inspected. For resize/moving to work correctly you will need to use the LifeSpanHandler implementation. (Set LifeSpanHandler to an instance of LifeSpanHandler)
(Defined by WebBrowserExtensions.)
Public Extension MethodStartDownload
Download the file at url using IDownloadHandler.
(Defined by WebBrowserExtensions.)
Public Extension MethodStop
Stops loading the current page.
(Defined by WebBrowserExtensions.)
Public Extension MethodStopFinding
Cancel all searches that are currently going on.
(Defined by WebBrowserExtensions.)
Public Extension MethodUndo
Execute Undo on the focused frame.
(Defined by WebBrowserExtensions.)
Public Extension MethodUnRegisterResourceHandler
Unregister a ResourceHandler. Can only be used when browser.ResourceHandlerFactory is an instance of DefaultResourceHandlerFactory.
(Defined by WebBrowserExtensions.)
Public Extension MethodViewSource
Opens up a new program window (using the default text editor) where the source code of the currently displayed web page is shown.
(Defined by WebBrowserExtensions.)
Public Extension MethodCode exampleWaitForSelectorAsync
Waits for a DOM element specified by the selector string to be added to or removed from the DOM. A simplified version of Puppeteer WaitForSelector. Uses a MutationObserver to wait for the element to become added or removed.
(Defined by WebBrowserExtensions.)
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See Also