interface ICoreWebView2Settings

[アーティクル]
10/14/2020

Note

This reference is no longer being maintained. For the latest API reference, see WebView2 API Reference.

interface ICoreWebView2Settings
  : public IUnknown

Defines properties that enable, disable, or modify WebView features.

Summary

Members	Descriptions
get_AreDefaultContextMenusEnabled	The AreDefaultContextMenusEnabled property is used to prevent default context menus from being shown to user in webview.
get_AreDefaultScriptDialogsEnabled	AreDefaultScriptDialogsEnabled is used when loading a new HTML document.
get_AreDevToolsEnabled	AreDevToolsEnabled controls whether the user is able to use the context menu or keyboard shortcuts to open the DevTools window.
get_AreHostObjectsAllowed	The AreHostObjectsAllowed property is used to control whether host objects are accessible from the page in webview.
get_IsBuiltInErrorPageEnabled	The IsBuiltInErrorPageEnabled property is used to disable built in error page for navigation failure and render process failure.
get_IsScriptEnabled	Controls if JavaScript execution is enabled in all future navigations in the WebView.
get_IsStatusBarEnabled	IsStatusBarEnabled controls whether the status bar will be displayed.
get_IsWebMessageEnabled	The IsWebMessageEnabled property is used when loading a new HTML document.
get_IsZoomControlEnabled	The IsZoomControlEnabled property is used to prevent the user from impacting the zoom of the WebView.
put_AreDefaultContextMenusEnabled	Set the AreDefaultContextMenusEnabled property.
put_AreDefaultScriptDialogsEnabled	Set the AreDefaultScriptDialogsEnabled property.
put_AreDevToolsEnabled	Set the AreDevToolsEnabled property.
put_AreHostObjectsAllowed	Set the AreHostObjectsAllowed property.
put_IsBuiltInErrorPageEnabled	Set the IsBuiltInErrorPageEnabled property.
put_IsScriptEnabled	Set the IsScriptEnabled property.
put_IsStatusBarEnabled	Set the IsStatusBarEnabled property.
put_IsWebMessageEnabled	Set the IsWebMessageEnabled property.
put_IsZoomControlEnabled	Set the IsZoomControlEnabled property.

Setting changes made after NavigationStarting event will not apply until the next top level navigation.

Members

get_AreDefaultContextMenusEnabled

The AreDefaultContextMenusEnabled property is used to prevent default context menus from being shown to user in webview.

public HRESULT get_AreDefaultContextMenusEnabled(BOOL * enabled)

Defaults to TRUE.

            BOOL allowContextMenus;
            CHECK_FAILURE(m_settings->get_AreDefaultContextMenusEnabled(
                &allowContextMenus));
            if (allowContextMenus) {
                CHECK_FAILURE(m_settings->put_AreDefaultContextMenusEnabled(FALSE));
                MessageBox(nullptr,
                L"Context menus will be disabled after the next navigation.",
                L"Settings change", MB_OK);
            }
            else {
                CHECK_FAILURE(m_settings->put_AreDefaultContextMenusEnabled(TRUE));
                MessageBox(nullptr,
                    L"Context menus will be enabled after the next navigation.",
                    L"Settings change", MB_OK);
            }

get_AreDefaultScriptDialogsEnabled

AreDefaultScriptDialogsEnabled is used when loading a new HTML document.

public HRESULT get_AreDefaultScriptDialogsEnabled(BOOL * areDefaultScriptDialogsEnabled)

If set to false, then WebView won't render the default javascript dialog box (Specifically those shown by the javascript alert, confirm, prompt functions and beforeunload event). Instead, if an event handler is set by SetScriptDialogOpeningEventHandler, WebView will send an event that will contain all of the information for the dialog and allow the host app to show its own custom UI.

get_AreDevToolsEnabled

AreDevToolsEnabled controls whether the user is able to use the context menu or keyboard shortcuts to open the DevTools window.

public HRESULT get_AreDevToolsEnabled(BOOL * areDevToolsEnabled)

It is true by default.

get_AreHostObjectsAllowed

The AreHostObjectsAllowed property is used to control whether host objects are accessible from the page in webview.

public HRESULT get_AreHostObjectsAllowed(BOOL * allowed)

Defaults to TRUE.

            BOOL allowHostObjects;
            CHECK_FAILURE(m_settings->get_AreHostObjectsAllowed(&allowHostObjects));
            if (allowHostObjects)
            {
                CHECK_FAILURE(m_settings->put_AreHostObjectsAllowed(FALSE));
                MessageBox(
                    nullptr, L"Access to host objects will be denied after the next navigation.",
                    L"Settings change", MB_OK);
            }
            else
            {
                CHECK_FAILURE(m_settings->put_AreHostObjectsAllowed(TRUE));
                MessageBox(
                    nullptr, L"Access to host objects will be allowed after the next navigation.",
                    L"Settings change", MB_OK);
            }

get_IsBuiltInErrorPageEnabled

The IsBuiltInErrorPageEnabled property is used to disable built in error page for navigation failure and render process failure.

public HRESULT get_IsBuiltInErrorPageEnabled(BOOL * enabled)

Defaults to TRUE. When disabled, blank page will be shown when related error happens.

            BOOL enabled;
            CHECK_FAILURE(m_settings->get_IsBuiltInErrorPageEnabled(&enabled));
            if (enabled)
            {
                CHECK_FAILURE(m_settings->put_IsBuiltInErrorPageEnabled(FALSE));
                MessageBox(
                    nullptr, L"Built-in error page will be disabled for future navigation.",
                    L"Settings change", MB_OK);
            }
            else
            {
                CHECK_FAILURE(m_settings->put_IsBuiltInErrorPageEnabled(TRUE));
                MessageBox(
                    nullptr, L"Built-in error page will be enabled for future navigation.",
                    L"Settings change", MB_OK);
            }

get_IsScriptEnabled

Controls if JavaScript execution is enabled in all future navigations in the WebView.

public HRESULT get_IsScriptEnabled(BOOL * isScriptEnabled)

This only affects scripts in the document; scripts injected with ExecuteScript will run even if script is disabled. It is true by default.

        // Changes to settings will apply at the next navigation, which includes the
        // navigation after a NavigationStarting event.  We can use this to change
        // settings according to what site we're visiting.
        if (ShouldBlockScriptForUri(uri.get()))
        {
            m_settings->put_IsScriptEnabled(FALSE);
        }
        else
        {
            m_settings->put_IsScriptEnabled(m_isScriptEnabled);
        }

get_IsStatusBarEnabled

IsStatusBarEnabled controls whether the status bar will be displayed.

public HRESULT get_IsStatusBarEnabled(BOOL * isStatusBarEnabled)

The status bar is usually displayed in the lower left of the WebView and shows things such as the URI of a link when the user hovers over it and other information. It is true by default.

get_IsWebMessageEnabled

The IsWebMessageEnabled property is used when loading a new HTML document.

public HRESULT get_IsWebMessageEnabled(BOOL * isWebMessageEnabled)

If set to true, communication from the host to the webview's top level HTML document is allowed via PostWebMessageAsJson, PostWebMessageAsString, and window.chrome.webview's message event (see PostWebMessageAsJson documentation for details). Communication from the webview's top level HTML document to the host is allowed via window.chrome.webview's postMessage function and the SetWebMessageReceivedEventHandler method (see the SetWebMessageReceivedEventHandler documentation for details). If set to false, then communication is disallowed. PostWebMessageAsJson and PostWebMessageAsString will fail with E_ACCESSDENIED and window.chrome.webview.postMessage will fail by throwing an instance of an Error object. It is true by default.

    ComPtr<ICoreWebView2Settings> settings;
    CHECK_FAILURE(m_webView->get_Settings(&settings));

    CHECK_FAILURE(settings->put_IsWebMessageEnabled(TRUE));

get_IsZoomControlEnabled

The IsZoomControlEnabled property is used to prevent the user from impacting the zoom of the WebView.

public HRESULT get_IsZoomControlEnabled(BOOL * enabled)

Defaults to TRUE. When disabled, user will not be able to zoom using ctrl+/- or ctrl+mouse wheel, but the zoom can be set via ZoomFactor API.

            BOOL zoomControlEnabled;
            CHECK_FAILURE(m_settings->get_IsZoomControlEnabled(&zoomControlEnabled));
            if (zoomControlEnabled)
            {
                CHECK_FAILURE(m_settings->put_IsZoomControlEnabled(FALSE));
                MessageBox(
                    nullptr, L"Zoom control will be disabled after the next navigation.", L"Settings change",
                    MB_OK);
            }
            else
            {
                CHECK_FAILURE(m_settings->put_IsZoomControlEnabled(TRUE));
                MessageBox(
                    nullptr, L"Zoom control will be enabled after the next navigation.", L"Settings change",
                    MB_OK);
            }

put_AreDefaultContextMenusEnabled

Set the AreDefaultContextMenusEnabled property.

public HRESULT put_AreDefaultContextMenusEnabled(BOOL enabled)

put_AreDefaultScriptDialogsEnabled

Set the AreDefaultScriptDialogsEnabled property.

public HRESULT put_AreDefaultScriptDialogsEnabled(BOOL areDefaultScriptDialogsEnabled)

put_AreDevToolsEnabled

Set the AreDevToolsEnabled property.

public HRESULT put_AreDevToolsEnabled(BOOL areDevToolsEnabled)

put_AreHostObjectsAllowed

Set the AreHostObjectsAllowed property.

public HRESULT put_AreHostObjectsAllowed(BOOL allowed)

put_IsBuiltInErrorPageEnabled

Set the IsBuiltInErrorPageEnabled property.

public HRESULT put_IsBuiltInErrorPageEnabled(BOOL enabled)

put_IsScriptEnabled

Set the IsScriptEnabled property.

public HRESULT put_IsScriptEnabled(BOOL isScriptEnabled)

put_IsStatusBarEnabled

Set the IsStatusBarEnabled property.

public HRESULT put_IsStatusBarEnabled(BOOL isStatusBarEnabled)

put_IsWebMessageEnabled

Set the IsWebMessageEnabled property.

public HRESULT put_IsWebMessageEnabled(BOOL isWebMessageEnabled)

put_IsZoomControlEnabled

Set the IsZoomControlEnabled property.

public HRESULT put_IsZoomControlEnabled(BOOL enabled)