interface ICoreWebView2Controller4

interface ICoreWebView2Controller4
  : public ICoreWebView2Controller3

This is the ICoreWebView2Controller4 interface.

Summary

Members	Descriptions
get_AllowExternalDrop	Gets the AllowExternalDrop property.
put_AllowExternalDrop	Gets the AllowExternalDrop property which is used to configure the capability that dragging objects from outside the bounds of webview2 and dropping into webview2 is allowed or disallowed.

The ICoreWebView2Controller4 provides interface to enable/disable external drop.

Applies to

Product	Introduced
WebView2 Win32	1.0.1185.39
WebView2 Win32 Prerelease	1.0.1189

Members

get_AllowExternalDrop

Gets the AllowExternalDrop property.

public HRESULT get_AllowExternalDrop(BOOL * value)

put_AllowExternalDrop

Gets the AllowExternalDrop property which is used to configure the capability that dragging objects from outside the bounds of webview2 and dropping into webview2 is allowed or disallowed.

public HRESULT put_AllowExternalDrop(BOOL value)

The default value is TRUE.

            wil::com_ptr<ICoreWebView2Controller> controller =
                m_appWindow->GetWebViewController();
            wil::com_ptr<ICoreWebView2Controller4> controller4 =
                controller.try_query<ICoreWebView2Controller4>();
            if (controller4)
            {
                BOOL allowExternalDrop;
                CHECK_FAILURE(controller4->get_AllowExternalDrop(&allowExternalDrop));
                if (allowExternalDrop)
                {
                    CHECK_FAILURE(controller4->put_AllowExternalDrop(FALSE));
                    MessageBox(
                        nullptr, L"WebView disallows dropping files now.",
                        L"WebView AllowExternalDrop property changed", MB_OK);
                }
                else
                {
                    CHECK_FAILURE(controller4->put_AllowExternalDrop(TRUE));
                    MessageBox(
                        nullptr, L"WebView allows dropping files now.",
                        L"WebView AllowExternalDrop property changed", MB_OK);
                }
            }