CefSharp.WinForms
Initialization settings. Many of these and other settings can also configured
using command-line switches.
ChromiumWebBrowser is the WinForms web browser control
The managed cef browser adapter
The parent form message interceptor
A flag that indicates whether or not the designer is active
NOTE: DesignMode becomes false by the time we get to the destructor/dispose so it gets stored here
A flag that indicates whether or not has been called.
Has the underlying Cef Browser been created (slightly different to initialized in that
the browser is initialized in an async fashion)
A flag indicating if the was used when calling CreateBrowser
If false and contains a non empty string Load will be called
on the main frame
If true the the WS_EX_NOACTIVATE style will be removed so that future mouse clicks
inside the browser correctly activate and focus the window.
Browser initialization settings
The request context (we deliberately use a private variable so we can throw an exception if
user attempts to set after browser created)
Parking control used to temporarily host the CefBrowser instance
when is true.
This flag is set when the browser gets focus before the underlying CEF browser
has been initialized.
Gets a value indicating whether this instance is disposed.
if this instance is disposed; otherwise, .
Gets or sets the browser settings.
The browser settings.
Activates browser upon creation, the default value is false. Prior to version 73
the default behaviour was to activate browser on creation (Equivalent of setting this property to true).
To restore this behaviour set this value to true immediately after you create the instance.
https://bitbucket.org/chromiumembedded/cef/issues/1856/branch-2526-cef-activates-browser-window
Gets or sets the request context.
The request context.
A flag that indicates whether the control is currently loading one or more web pages (true) or not (false).
true if this instance is loading; otherwise, false.
In the WPF control, this property is implemented as a Dependency Property and fully supports data
binding.
The text that will be displayed as a ToolTip
The tooltip text.
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).
The address.
In the WPF control, this property is implemented as a Dependency Property and fully supports data
binding.
Occurs when the browser address changed.
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.
Occurs when the browser title changed.
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.
A flag that indicates whether the state of the control currently supports the GoForward action (true) or not (false).
true if this instance can go forward; otherwise, false.
In the WPF control, this property is implemented as a Dependency Property and fully supports data
binding.
A flag that indicates whether the state of the control current supports the GoBack action (true) or not (false).
true if this instance can go back; otherwise, false.
In the WPF control, this property is implemented as a Dependency Property and fully supports data
binding.
A flag that indicates whether the WebBrowser is initialized (true) or not (false).
true if this instance is browser initialized; otherwise, false.
ParentFormMessageInterceptor hooks the Form handle and forwards
the move/active messages to the browser, the default is true
and should only be required when using
set to true.
By default when is called
the underlying Browser Hwnd is only parked (moved to a temp parent)
when is true, there are a few other
cases where parking of the control is desired, you can force parking by setting
this property to true.
You may wish to set this property to true when using the browser in conjunction
with https://github.com/dockpanelsuite/dockpanelsuite
Initializes static members of the class.
Handles the event.
The sender.
The instance containing the event data.
This constructor exists as the WinForms designer requires a parameterless constructor, if you are instantiating
an instance of this class in code then use the
constructor overload instead. Using this constructor in code is unsupported and you may experience 's
when attempting to access some of the properties immediately after instantiation.
Initializes a new instance of the class.
**Important** - When using this constructor the property
will default to .
html string to be initially loaded in the browser.
(Optional) Request context that will be used for this browser instance, if null the Global
Request Context will be used.
Initializes a new instance of the class.
**Important** - When using this constructor the property
will default to .
The address.
(Optional) Request context that will be used for this browser instance, if null the Global
Request Context will be used.
Required for designer support - this method cannot be inlined as the designer
will attempt to load libcef.dll and will subsequently throw an exception.
TODO: Still not happy with this method name, need something better
If not in design mode; Releases unmanaged and - optionally - managed resources for the
to release both managed and unmanaged resources; to release only unmanaged resources.
Releases unmanaged and - optionally - managed resources for the
to release both managed and unmanaged resources; to release only unmanaged resources.
This method cannot be inlined as the designer will attempt to load libcef.dll and will subsequently throw an exception.
The javascript object repository, one repository per ChromiumWebBrowser instance.
Raises the event.
An that contains the event data.
Override this method to handle creation of WindowInfo. This method can be used to customise aspects of
browser creation including configuration of settings such as .
Window Activation is disabled by default, you can re-enable it by overriding and removing the
WS_EX_NOACTIVATE style from .
Window handle for the Control
Window Info
To re-enable Window Activation then remove WS_EX_NOACTIVATE from ExStyle
const uint WS_EX_NOACTIVATE = 0x08000000;
windowInfo.ExStyle &= ~WS_EX_NOACTIVATE;
Sets the address.
The instance containing the event data.
Sets the title.
The instance containing the event data.
Sets the tooltip text.
The tooltip text.
Manually implement Focused because cef does not implement it.
true if focused; otherwise, false.
This is also how the Microsoft's WebBrowserControl implements the Focused property.
When minimized set the browser window size to 0x0 to reduce resource usage.
https://github.com/chromiumembedded/cef/blob/c7701b8a6168f105f2c2d6b239ce3958da3e3f13/tests/cefclient/browser/browser_window_std_win.cc#L87
Show the browser (called after previous minimised)
Returns the current IBrowser Instance
browser instance
Gets the associated with
a specific instance.
browser
returns the assocaited or null if Disposed or no host found.
Used as workaround for issue https://github.com/cefsharp/CefSharp/issues/3021
The browser initialized - boolean represented as 0 (false) and 1(true) as we use Interlocker to increment/reset
The value for disposal, if it's 1 (one) then this instance is either disposed
or in the process of getting disposed
The browser
Initial browser load task complection source
Initial browser load action
Get access to the core instance.
Maybe null if the underlying CEF Browser has not yet been
created or if this control has been disposed. Check
before accessing.
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
Implement and assign to handle dialog events.
The dialog handler.
Implement and assign to handle events related to JavaScript Dialogs.
The js dialog handler.
Implement and assign to handle events related to key press.
The keyboard handler.
Implement and assign to handle events related to browser requests.
The request handler.
Implement and assign to handle events related to downloading files.
The download handler.
Implement and assign to handle events related to browser load status.
The load handler.
Implement and assign to handle events related to popups.
The life span handler.
Implement and assign to handle events related to browser display state.
The display handler.
Implement and assign to handle events related to the browser context menu
The menu handler.
Implement and assign to handle messages from the render process.
The render process message handler.
Implement to handle events related to find results.
The find handler.
Implement to handle audio events.
Implement to handle frame events.
The for this ChromiumWebBrowser.
The focus handler.
If you need customized focus handling behavior for WinForms, the suggested
best practice would be to inherit from DefaultFocusHandler and try to avoid
needing to override the logic in OnGotFocus. The implementation in
DefaultFocusHandler relies on very detailed behavior of how WinForms and
Windows interact during window activation.
Implement and assign to handle events related to dragging.
The drag handler.
Implement and control the loading of resources
The resource handler factory.
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.
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.
Whilst this may seem like a logical place to execute js, it's called before the DOM has been loaded, implement
as it's called when the underlying V8Context is created
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.
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.
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).
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).
Event handler that will get called when the message that originates from CefSharp.PostMessage
A flag that indicates whether the WebBrowser is initialized (true) or not (false).
true if this instance is browser initialized; otherwise, false.
Handles the event.
The instance containing the event data.
Handles the event.
The instance containing the event data.
Handles the event.
The instance containing the event data.
Handles the event.
The instance containing the event data.
Handles the event.
The instance containing the event data.
Gets or sets a value indicating whether this instance has parent.
true if this instance has parent; otherwise, false.
Gets the browser adapter.
The browser adapter.
Sets the loading state change.
The instance containing the event data.
Called after browser created.
The browser.
Sets the loading state change.
The instance containing the event data.
Sets the handler references to null.
Where required also calls Dispose().
Check is browser is initialized
true if browser is initialized
Throw exception if browser not initialized.
Thrown when an exception error condition occurs.
Throw exception if disposed.
Thrown when a supplied object has been disposed.
ChromiumWebBrowser Control Designer
Receives a call when the control that the designer is managing has painted its surface so the designer can paint any additional adornments on top of the control.
args
Adjusts the set of properties the component exposes through a TypeDescriptor.
properties
ChromiumWidgetHandleFinder is a helper class used to find the
child Hwnd for the browser instance.
Class Name of the Chrome_RenderWidgetHostHWND Child Window
EnumWindowProc delegate used by
A handle to a child window of the parent window specified in EnumChildWindows
The application-defined value given in EnumChildWindows
To continue enumeration, the callback function must return true; to stop enumeration, it must return false.
Chromium's message-loop Window isn't created synchronously, so this may not find it.
If so, you need to wait and try again later.
ChromiumWebBrowser instance
Handle of the child HWND with the name
returns true if the HWND was found otherwise false.
Chromium's message-loop Window isn't created synchronously, so this may not find it.
If so, you need to wait and try again later.
IBrowser instance
Handle of the child HWND with the name
returns true if the HWND was found otherwise false.
Helper function used to find the child HWND with the ClassName matching
Chromium's message-loop Window isn't created synchronously, so this may not find it.
If so, you need to wait and try again later.
In most cases you should use the overload.
control Handle
class name used to match
Handle of the child HWND with the name
returns true if the HWND was found otherwise false.
Provides a convenient implement
that can be used without having to create your own class
ChromiumWidgetMessageInterceptor constructor
Control is used to handled the event so
we can automatically call . If null then you are responsible
for calling
Hwnd to intercept messages for.
Register a Func which is used to intercept
calls. should return true if the message
was handled, otherwise false.
Func to be used to intercept messages, null to clear an existing function.
A WinForms Specific implementation that simplifies
the process of hosting a Popup as a Control/Tab. Use this implementation as a base
for your own custom implementation if you are using
Called beforethe popup is created, can be used to cancel popup creation if required
or modify .
It's important to note that the methods of this interface are called on a CEF UI thread,
which by default is not the same as your application UI thread.
the ChromiumWebBrowser control
The browser instance that launched this popup.
The HTML frame that launched this popup.
The URL of the popup content. (This may be empty/null)
The name of the popup. (This may be empty/null)
The value indicates where the user intended to
open the popup (e.g. current tab, new tab, etc)
The value will be true if the popup was opened via explicit user gesture
(e.g. clicking a link) or false if the popup opened automatically (e.g. via the DomContentLoaded event).
browser settings, defaults to source browsers
To cancel creation of the popup return true otherwise return false.
Called when the has been created.
When called you must add the control to it's intended parent
so the can be calculated to set the initial
size correctly.
popup host control
url
Called when the instance has been created.
The reference will be valid until is called
popup host control, maybe null if Browser is hosted in a native Popup window.
DevTools by default will be hosted in a native popup window.
browser
Called when the is to be removed from it's parent.
When called you must remove/dispose of the .
popup host control
browser
Called to create a new instance of . Allows creation of a derived
implementation of .
A custom instance of .
A WinForms Specific implementation that simplifies
the process of hosting a Popup as a Control/Tab.
This implementation returns true in
so no WM_CLOSE message is sent, this differs from the default CEF behaviour.
NOTE: DevTools popups DO NOT trigger OnBeforePopup.
The will be called before the popup has been created and
can be used to cancel popup creation if required or modify .
Action to be invoked before popup is created.
instance allowing you to chain method calls together
The will be called when the has been
created. When the is called you must add the control to it's intended parent
so the can be calculated to set the initial
size correctly.
Action to be invoked when the Popup host has been created and is ready to be attached to it's parent.
instance allowing you to chain method calls together
The will be called when the has been
created. The instance is valid until
is called. provides low level access to the CEF Browser, you can access frames, view source,
perform navigation (via frame) etc.
Action to be invoked when the has been created.
instance allowing you to chain method calls together
The will be called when the is to be
removed from it's parent.
When the is called you must remove/dispose of the .
Action to be invoked when the Popup is to be destroyed.
instance allowing you to chain method calls together
Create a new instance of the
which can be used to create a WinForms specific
implementation that simplifies the process of hosting a Popup as a Control/Tab.
In scnarios where you also need to implement then instead
of implementing directly you will need to inherit from .
As it provides base functionality required to make events work correctly.
A which can be used to fluently create an .
Call to create the actual instance after you have call
etc.
Fluent Builder
The will be called before the popup has been created and
can be used to cancel popup creation if required, modify and disable javascript.
Action to be invoked before popup is created.
instance allowing you to chain method calls together
The will be called when the has been
created. When the is called you must add the control to it's intended parent
so the can be calculated to set the initial
size correctly.
Action to be invoked when the Popup is to be destroyed.
instance allowing you to chain method calls together
The will be called when the has been
created. The instance is valid until
is called. provides low level access to the CEF Browser, you can access frames, view source,
perform navigation (via frame) etc.
Action to be invoked when the has been created.
instance allowing you to chain method calls together
The will be called when the is to be
removed from it's parent.
When the is called you must remove/dispose of the .
Action to be invoked when the Popup is to be destroyed.
instance allowing you to chain method calls together
Creates an implementation
that can be used to host popups as tabs/controls. The resulting
returns true in
so no WM_CLOSE message is sent, this differs from the default CEF behaviour.
a instance
A WinForms Specific implementation that simplifies
the process of hosting a Popup as a Control/Tab.Use this implementation as a base
for your own custom implementation if you are using
Popup Creation options
Popup creation is cancled, no further action will occur
Popup creation will continue as per normal.
Popup creation will continue with javascript disabled.
Chromium Browser Host Control, used for hosting Popups in WinForms
Get access to the core instance.
Maybe null if the underlying CEF Browser has not yet been
created or if this control has been disposed. Check
before accessing.
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.
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.
Whilst this may seem like a logical place to execute js, it's called before the DOM has been loaded, implement
as it's called when the underlying V8Context is created
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.
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.
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).
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).
Occurs when the browser address changed.
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.
Occurs when the browser title changed.
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.
A flag that indicates whether the control is currently loading one or more web pages (true) or not (false).
true if this instance is loading; otherwise, false.
In the WPF control, this property is implemented as a Dependency Property and fully supports data
binding.
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).
The address.
In the WPF control, this property is implemented as a Dependency Property and fully supports data
binding.
A flag that indicates whether the state of the control currently supports the GoForward action (true) or not (false).
true if this instance can go forward; otherwise, false.
In the WPF control, this property is implemented as a Dependency Property and fully supports data
binding.
A flag that indicates whether the state of the control current supports the GoBack action (true) or not (false).
true if this instance can go back; otherwise, false.
In the WPF control, this property is implemented as a Dependency Property and fully supports data
binding.
A flag that indicates whether the WebBrowser is initialized (true) or not (false).
true if this instance is browser initialized; otherwise, false.
Handles the event.
The instance containing the event data.
Handles the event.
The instance containing the event data.
Handles the event.
The instance containing the event data.
Handles the event.
The instance containing the event data.
Handles the event.
The instance containing the event data.
Sets the loading state change.
The instance containing the event data.
Sets the title.
The instance containing the event data.
Sets the address.
The instance containing the event data.
Loads the specified in the Main Frame.
The URL to be loaded.
Returns the main (top-level) frame for the browser window.
the main frame
Gets the associated with
a specific instance.
browser
returns the assocaited or null if Disposed or no host found.
Chromium Browser Host Control, provides base functionality for hosting a
CefBrowser instance (main browser and popups) in WinForms.
IntPtr that represents the CefBrowser Hwnd
Used for sending messages to the browser
e.g. resize
Set to true while handing an activating WM_ACTIVATE message.
MUST ONLY be cleared by DefaultFocusHandler.
true if this instance is activating; otherwise, false.
Event called after the underlying CEF browser instance has been created.
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.
Gets the default size of the control.
The default of the control.
Makes certain keys as Input keys when CefSettings.MultiThreadedMessageLoop = false
key data
true for a select list of keys otherwise defers to base.IsInputKey
Raises the event.
An that contains the event data.
Resizes the browser to the specified and .
If and are both 0 then the browser
will be hidden and resource usage will be minimised.
width
height
Resizes the browser.
width
height
To avoid the Designer trying to load CefSharp.Core.Runtime we explicitly
ask for NoInlining.
When minimized set the browser window size to 0x0 to reduce resource usage.
https://github.com/chromiumembedded/cef/blob/c7701b8a6168f105f2c2d6b239ce3958da3e3f13/tests/cefclient/browser/browser_window_std_win.cc#L87
Show the browser (called after previous minimised)
Trigger the event
Gets the or associated with
a specific instance.
browser
returns the assocaited or or null if Disposed or no host found.
ControlExtensions.
Executes the Action asynchronously on the UI thread, does not block execution on the calling thread.
No action will be performed if the control doesn't have a valid handle or the control is Disposed/Disposing.
the control for which the update is required
action to be performed on the control
Executes the Action sync on the UI thread, blocks execution on the calling thread.
No action will be performed if the control doesn't have a valid handle or the control is Disposed/Disposing.
the control for which the update is required
action to be performed on the control
Activates the specified control.
The control.
true if XXXX, false otherwise.
Returns whether the supplied control is the currently
active control.
the control to check
true if the control is the currently active control
Selects the next control.
The control.
if set to true [next].
Default implementation of
for the WinForms implementation
Called when the browser component has received focus.
the ChromiumWebBrowser control
the browser object
Try to avoid needing to override this logic in a subclass. The implementation in
DefaultFocusHandler relies on very detailed behavior of how WinForms and
Windows interact during window activation.
Called when the browser component is requesting focus.
the ChromiumWebBrowser control
the browser object
Indicates where the focus request is originating from.
Return false to allow the focus to be set or true to cancel setting the focus.
Called when the browser component is about to lose focus.
For instance, if focus was on the last HTML element and the user pressed the TAB key.
the ChromiumWebBrowser control
the browser object
Will be true if the browser is giving focus to the next component
and false if the browser is giving focus to the previous component.
Class NativeMethods.
The w m_ move
The w m_ moving
The w m_ activate
ParentFormMessageInterceptor - hooks into the parent forms
message loop to incercept messages like WM_MOVE
Keep track of whether a move is in progress.
Used to determine the coordinates involved in the move
Store the previous window state, used to determine if the
Windows was previously
and resume rendering
Gets or sets the browser.
The browser.
Gets or sets the parent form.
The parent form.
Called when the parent form is moving
Initializes a new instance of the class.
The browser.
Call to force refinding of the parent Form.
(i.e. top level window that owns the ChromiumWebBrowserControl)
Adjust the form to listen to if the ChromiumWebBrowserControl's parent changes.
The ChromiumWebBrowser whose parent has changed.
The instance containing the event data.
Handles the event.
The sender.
The instance containing the event data.
Handles the event.
The sender.
The instance containing the event data.
Invokes the default window procedure associated with this window.
A that is associated with the current Windows message.
Called when [moving].
Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
Releases unmanaged and - optionally - managed resources.
true to release both managed and unmanaged resources; false to release only unmanaged resources.
When overridden in a derived class, manages an unhandled thread exception.
An that specifies the unhandled thread exception.
Winforms Specific Chromium browser implementation, differs from in that
this interface is implemented by both and
where is only implemented by
Occurs when the browser title changed.
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.
Occurs when the browser address changed.
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.
Event called after the underlying CEF browser instance has been created.
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.
WinForms specific implementation, has events the
implementation exposes.
and
Helper extensions for performing common CefSharp related WinForms tasks
Manually call https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-destroywindow
passing in the handle returned from .
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.
the or instance.
If the function succeeds, the return value is true.
//Invoke on the CEF UI Thread
Cef.UIThreadTaskFactory.StartNew(() =>
{
var closed = chromiumWebBrowser.DestroyWindow();
});
Open DevTools using 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 implementation.
(Set to an instance of )
instance
Control used as the parent for DevTools (a custom control will be added to the collection)
x coordinate (used for inspectElement)
y coordinate (used for inspectElement)
Returns the that hosts the DevTools instance if successful, otherwise returns null on error.
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 implementation.
(Set to an instance of )
instance
Action that is Invoked when the DevTools Host Control has been created and needs to be added to it's parent.
It's important the control is added to it's intended parent at this point so the
can be calculated to set the initial display size.
x coordinate (used for inspectElement)
y coordinate (used for inspectElement)
Returns the that hosts the DevTools instance if successful, otherwise returns null on error.