interface ICoreWebView2ExperimentalFile

Note

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

Note

This an experimental API that is shipped with our prerelease SDK. See WebView2 release notes.

interface ICoreWebView2ExperimentalFile
  : public IUnknown

Representation of a DOM (File)[https://developer.mozilla.org/en-US/docs/Web/API/File] object passed via WebMessage.

Summary

Members	Descriptions
get_Path	Get the absolute file path.

You can use this object to obtain the path of a File dropped on WebView2.

    CHECK_FAILURE(m_webView->add_WebMessageReceived(
        Callback<ICoreWebView2WebMessageReceivedEventHandler>(
            [this](ICoreWebView2* sender, ICoreWebView2WebMessageReceivedEventArgs* args)
            {
                wil::com_ptr<ICoreWebView2ExperimentalWebMessageReceivedEventArgs> args2 =
                    wil::com_ptr<ICoreWebView2WebMessageReceivedEventArgs>(args)
                        .query<ICoreWebView2ExperimentalWebMessageReceivedEventArgs>();
                wil::com_ptr<ICoreWebView2ExperimentalObjectCollectionView> objectsCollection;
                args2->get_AdditionalObjects(&objectsCollection);
                unsigned int length;
                objectsCollection->get_Count(&length);

                // Array of file paths to be sent back to the webview as JSON
                std::wstring pathObjects = L"[";
                for (unsigned int i = 0; i < length; i++)
                {
                    wil::com_ptr<IUnknown> object;
                    objectsCollection->GetValueAtIndex(i, &object);

                    wil::com_ptr<ICoreWebView2ExperimentalFile> file =
                        object.query<ICoreWebView2ExperimentalFile>();
                    if (file)
                    {
                        // Add the file to message to be sent back to webview
                        wil::unique_cotaskmem_string path;
                        file->get_Path(&path);
                        std::wstring pathObject =
                            L"{\"path\":\"" + std::wstring(path.get()) + L"\"}";
                        // Escape backslashes
                        std::wstring pathObjectEscaped;
                        for (const auto& c : pathObject)
                        {
                            if (c == L'\\')
                            {
                                pathObjectEscaped += L"\\\\";
                            }
                            else
                            {
                                pathObjectEscaped += c;
                            }
                        }
                        pathObjects += pathObjectEscaped;

                        if (i < length - 1)
                        {
                            pathObjects += L",";
                        }
                    }
                }
                pathObjects += L"]";

                // Post the message back to the webview so path is accessible to content
                m_webView->PostWebMessageAsJson(pathObjects.c_str());

                return S_OK;
            })
            .Get(),
        &m_webMessageReceivedToken));

Applies to

Product	Introduced
WebView2 Win32	N/A
WebView2 Win32 Prerelease	1.0.1671

Members

get_Path

Get the absolute file path.

public HRESULT get_Path(LPWSTR * path)