ExportRoundtripInformation

HtmlSaveOptions.ExportRoundtripInformation property

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.

public bool ExportRoundtripInformation { get; set; }

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 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.

Document doc = new Document(MyDir + "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.
HtmlSaveOptions options = new HtmlSaveOptions { ExportRoundtripInformation = exportRoundtripInformation };

doc.Save(ArtifactsDir + "HtmlSaveOptions.RoundTripInformation.html", options);

string outDocContents = File.ReadAllText(ArtifactsDir + "HtmlSaveOptions.RoundTripInformation.html");
doc = new Document(ArtifactsDir + "HtmlSaveOptions.RoundTripInformation.html");

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

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

    Assert.True(outDocContents.Contains(
        "<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(
        "<img src=\"HtmlSaveOptions.RoundTripInformation.003.jpeg\" width=\"350\" height=\"180\" alt=\"\" " +
        "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(
        "<span>Page number </span>" +
        "<span style=\"-aw-field-start:true\"></span>" +
        "<span style=\"-aw-field-code:' PAGE   \\\\* MERGEFORMAT '\"></span>" +
        "<span style=\"-aw-field-separator:true\"></span>" +
        "<span>1</span>" +
        "<span style=\"-aw-field-end:true\"></span>"));

    Assert.AreEqual(1, doc.Range.Fields.Count(f => f.Type == FieldType.FieldPage));
}
else
{
    Assert.True(outDocContents.Contains("<div style=\"clear:both\">"));
    Assert.True(outDocContents.Contains("<span>&#xa0;</span>"));

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

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

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

    Assert.True(outDocContents.Contains(
        "<span>Page number 1</span>"));

    Assert.AreEqual(0, doc.Range.Fields.Count(f => f.Type == FieldType.FieldPage));
}

See Also

HtmlSaveOptions.ExportRelativeFontSize HtmlSaveOptions.ExportShapesAsSvg