interface ICoreWebView2_7

interface ICoreWebView2_7
  : public ICoreWebView2_6

This interface is an extension of ICoreWebView2_6 that supports printing to PDF.

Summary

Members	Descriptions
PrintToPdf	Print the current page to PDF asynchronously with the provided settings.

Applies to

Product	Introduced
WebView2 Win32	1.0.1020.30
WebView2 Win32 Prerelease	1.0.1056

Members

PrintToPdf

Print the current page to PDF asynchronously with the provided settings.

public HRESULT PrintToPdf(LPCWSTR ResultFilePath, ICoreWebView2PrintSettings * printSettings, ICoreWebView2PrintToPdfCompletedHandler * handler)

See ICoreWebView2PrintSettings for description of settings. Passing nullptr for printSettings results in default print settings used.

Use resultFilePath to specify the path to the PDF file. The host should provide an absolute path, including file name. If the path points to an existing file, the file will be overwritten. If the path is not valid, the method fails with E_INVALIDARG.

The async PrintToPdf operation completes when the data has been written to the PDF file. At this time the ICoreWebView2PrintToPdfCompletedHandler is invoked. If the application exits before printing is complete, the file is not saved. Only one Printing operation can be in progress at a time. If PrintToPdf is called while a PrintToPdf or PrintToPdfStream or Print or ShowPrintUI job is in progress, the completed handler is immediately invoked with isSuccessful set to FALSE.

// Shows the user a file selection dialog, then uses the selected path when
// printing to PDF. If `enableLandscape` is true, the page is printed
// in landscape mode, otherwise the page is printed in portrait mode.
void FileComponent::PrintToPdf(bool enableLandscape)
{
    WCHAR defaultName[MAX_PATH] = L"WebView2_PrintedPdf.pdf";
    OPENFILENAME openFileName = CreateOpenFileName(defaultName, L"PDF File\0*.pdf\0");
    if (GetSaveFileName(&openFileName))
    {
        wil::com_ptr<ICoreWebView2PrintSettings> printSettings = nullptr;
        if (enableLandscape)
        {
            wil::com_ptr<ICoreWebView2Environment6> webviewEnvironment6;
            CHECK_FAILURE(m_appWindow->GetWebViewEnvironment()->QueryInterface(
                IID_PPV_ARGS(&webviewEnvironment6)));
            if (webviewEnvironment6)
            {
                CHECK_FAILURE(webviewEnvironment6->CreatePrintSettings(&printSettings));
                CHECK_FAILURE(
                    printSettings->put_Orientation(COREWEBVIEW2_PRINT_ORIENTATION_LANDSCAPE));
            }
        }

        wil::com_ptr<ICoreWebView2_7> webview2_7;
        CHECK_FAILURE(m_webView->QueryInterface(IID_PPV_ARGS(&webview2_7)));
        if (webview2_7)
        {
            m_printToPdfInProgress = true;
            CHECK_FAILURE(webview2_7->PrintToPdf(
                openFileName.lpstrFile, printSettings.get(),
                Callback<ICoreWebView2PrintToPdfCompletedHandler>(
                    [this](HRESULT errorCode, BOOL isSuccessful) -> HRESULT {
                        CHECK_FAILURE(errorCode);
                        m_printToPdfInProgress = false;
                        m_appWindow->AsyncMessageBox(
                            (isSuccessful) ? L"Print to PDF succeeded"
                                           : L"Print to PDF failed",
                            L"Print to PDF Completed");
                        return S_OK;
                    })
                    .Get()));
        }
    }
}