## HtmlSaveOptions::get_ExportRoundtripInformation method


Specifies whether to write the roundtrip information when saving to HTML, MHTML or EPUB. Default value is **true** for HTML and **false** for MHTML and EPUB.

```cpp
bool Aspose::Words::Saving::HtmlSaveOptions::get_ExportRoundtripInformation() const
```

## Remarks


[Saving](../../) of the roundtrip information allows to restore document properties such as tab stops, comments, headers and footers during the HTML documents loading back into a [Document](../../../aspose.words/document/) object.

When **true**, the roundtrip information is exported as -aw-* CSS properties of the corresponding HTML elements.

When **false**, causes no roundtrip information to be output into produced files.

## Examples



Shows how to preserve hidden elements when converting to .html. 
```cpp
auto doc = System::MakeObject<Aspose::Words::Document>(System::String(get_MyDir() + u"Rendering.docx"));

// When converting a document to .html, some elements such as hidden bookmarks, original shape positions,
// or footnotes will be either removed or converted to plain text and effectively be lost.
// Saving with a HtmlSaveOptions object with ExportRoundtripInformation set to true will preserve these elements.

// When we save the document to HTML, we can pass a SaveOptions object to determine
// how the saving operation will export document elements that HTML does not support or use,
// such as hidden bookmarks and original shape positions.
// If we set the "ExportRoundtripInformation" flag to "true", the save operation will preserve these elements.
// If we set the "ExportRoundTripInformation" flag to "false", the save operation will discard these elements.
// We will want to preserve such elements if we intend to load the saved HTML using Aspose.Words,
// as they could be of use once again.
auto options = System::MakeObject<Aspose::Words::Saving::HtmlSaveOptions>();
options->set_ExportRoundtripInformation(exportRoundtripInformation);

doc->Save(get_ArtifactsDir() + u"HtmlSaveOptions.RoundTripInformation.html", options);

System::String outDocContents = System::IO::File::ReadAllText(get_ArtifactsDir() + u"HtmlSaveOptions.RoundTripInformation.html");
doc = System::MakeObject<Aspose::Words::Document>(System::String(get_ArtifactsDir() + u"HtmlSaveOptions.RoundTripInformation.html"));

if (exportRoundtripInformation)
{
    ASSERT_TRUE(outDocContents.Contains(u"<div style=\"-aw-headerfooter-type:header-primary; clear:both\">"));
    ASSERT_TRUE(outDocContents.Contains(u"<span style=\"-aw-import:ignore\">&#xa0;</span>"));

    ASSERT_TRUE(outDocContents.Contains(System::String(u"td colspan=\"2\" style=\"width:210.6pt; border-style:solid; border-width:0.75pt 6pt 0.75pt 0.75pt; ") + u"padding-right:2.4pt; padding-left:5.03pt; vertical-align:top; -aw-border-bottom:0.5pt single #000000; " + u"-aw-border-left:0.5pt single #000000; -aw-border-right:6pt single #000000; -aw-border-top:0.5pt single #000000\">"));

    ASSERT_TRUE(outDocContents.Contains(u"<li style=\"margin-left:30.2pt; padding-left:5.8pt; -aw-font-family:'Courier New'; -aw-font-weight:normal; -aw-number-format:'o'\">"));

    ASSERT_TRUE(outDocContents.Contains(System::String(u"<img src=\"HtmlSaveOptions.RoundTripInformation.003.jpeg\" width=\"350\" height=\"180\" alt=\"\" ") + u"style=\"-aw-left-pos:0pt; -aw-rel-hpos:column; -aw-rel-vpos:paragraph; -aw-top-pos:0pt; -aw-wrap-type:inline\" />"));

    ASSERT_TRUE(outDocContents.Contains(System::String(u"<span>Page number </span>") + u"<span style=\"-aw-field-start:true\"></span>" + u"<span style=\"-aw-field-code:' PAGE   \\\\* MERGEFORMAT '\"></span>" + u"<span style=\"-aw-field-separator:true\"></span>" + u"<span>1</span>" + u"<span style=\"-aw-field-end:true\"></span>"));

    ASSERT_EQ(1, doc->get_Range()->get_Fields()->LINQ_Count(static_cast<System::Func<System::SharedPtr<Aspose::Words::Fields::Field>, bool>>(static_cast<std::function<bool(System::SharedPtr<Aspose::Words::Fields::Field> f)>>([](System::SharedPtr<Aspose::Words::Fields::Field> f) -> bool
    {
        return f->get_Type() == FieldType::FieldPage;
    }))));
}
else
{
    ASSERT_TRUE(outDocContents.Contains(u"<div style=\"clear:both\">"));
    ASSERT_TRUE(outDocContents.Contains(u"<span>&#xa0;</span>"));

    ASSERT_TRUE(outDocContents.Contains(System::String(u"<td colspan=\"2\" style=\"width:210.6pt; border-style:solid; border-width:0.75pt 6pt 0.75pt 0.75pt; ") + u"padding-right:2.4pt; padding-left:5.03pt; vertical-align:top\">"));

    ASSERT_TRUE(outDocContents.Contains(u"<li style=\"margin-left:30.2pt; padding-left:5.8pt\">"));

    ASSERT_TRUE(outDocContents.Contains(u"<img src=\"HtmlSaveOptions.RoundTripInformation.003.jpeg\" width=\"350\" height=\"180\" alt=\"\" />"));

    ASSERT_TRUE(outDocContents.Contains(u"<span>Page number 1</span>"));

    ASSERT_EQ(0, doc->get_Range()->get_Fields()->LINQ_Count(static_cast<System::Func<System::SharedPtr<Aspose::Words::Fields::Field>, bool>>(static_cast<std::function<bool(System::SharedPtr<Aspose::Words::Fields::Field> f)>>([](System::SharedPtr<Aspose::Words::Fields::Field> f) -> bool
    {
        return f->get_Type() == FieldType::FieldPage;
    }))));
}
```

## See Also

* Class [HtmlSaveOptions](../)
* Namespace [Aspose::Words::Saving](../../)
* Library [Aspose.Words for C++](../../../)