Method ToggleSilent

SampleApps/WebView2APISample/ScenarioSaveAs.cpp:40–121

[ToggleSilent] Turn on/off Silent SaveAs, which won't show the system default save as dialog. This example hides the default save as dialog and shows a customized dialog.

// Turn on/off Silent SaveAs, which won't show the system default save as dialog.
// This example hides the default save as dialog and shows a customized dialog.
bool ScenarioSaveAs::ToggleSilent()
{
    if (!m_webView2_25)
        return false;
    m_silentSaveAs = !m_silentSaveAs;
    if (m_silentSaveAs && m_saveAsUIShowingToken.value == 0)
    {
        // Register a handler for the `SaveAsUIShowing` event.
        m_webView2_25->add_SaveAsUIShowing(
            Callback<ICoreWebView2SaveAsUIShowingEventHandler>(
                [this](ICoreWebView2* sender, ICoreWebView2SaveAsUIShowingEventArgs* args)
                    -> HRESULT
                {
                    // Hide the system default save as dialog.
                    CHECK_FAILURE(args->put_SuppressDefaultDialog(TRUE));

                    auto showCustomizedDialog = [this, args = wil::make_com_ptr(args)]
                    {
                        // Preview the content mime type, optional.
                        wil::unique_cotaskmem_string mimeType;
                        CHECK_FAILURE(args->get_ContentMimeType(&mimeType));

                        SaveAsDialog dialog(m_appWindow->GetMainWindow(), saveAsKind);
                        if (dialog.confirmed)
                        {
                            // Set the SaveAsFilePath, Kind, AllowReplace for the event
                            // args from this customized dialog inputs, optional. If nothing
                            // needs to input, the event args will provide default values.
                            CHECK_FAILURE(args->put_SaveAsFilePath(dialog.path.c_str()));
                            CHECK_FAILURE(args->put_Kind(dialog.selectedKind));
                            CHECK_FAILURE(args->put_AllowReplace(dialog.allowReplace));

                            BOOL allowReplace;
                            CHECK_FAILURE(args->get_AllowReplace(&allowReplace));
                            wil::unique_cotaskmem_string path;
                            CHECK_FAILURE(args->get_SaveAsFilePath(&path));
                            COREWEBVIEW2_SAVE_AS_KIND selectedKind;
                            CHECK_FAILURE(args->get_Kind(&selectedKind));

                            // Preview silent save as event args inputs, optional.
                            MessageBox(
                                m_appWindow->GetMainWindow(),
                                (std::wstring(L"Content Mime Type: ") + mimeType.get() + L"\n" +
                                 L"Fullpath: " + path.get() + L"\n" + L"Allow Replace: " +
                                 (allowReplace ? L"true" : L"false") + L"\n" +
                                 L"Selected Save As Kind: " + saveAsKindString[selectedKind])
                                    .c_str(),
                                L"Silent Save As Parameters Preview", MB_OK);
                        }
                        else
                        {
                            // Save As cancelled from this customized dialog.
                            CHECK_FAILURE(args->put_Cancel(TRUE));
                        }
                    };

                    wil::com_ptr<ICoreWebView2Deferral> deferral;
                    CHECK_FAILURE(args->GetDeferral(&deferral));