CssStyleSheetType

HtmlSaveOptions.CssStyleSheetType property

Specifies how CSS (Cascading Style Sheet) styles are exported to HTML, MHTML or EPUB. Default value is Inline for HTML/MHTML and External for EPUB.

public CssStyleSheetType CssStyleSheetType { get; set; }

Remarks

Saving CSS style sheet into an external file is only supported when saving to HTML. When you are exporting to one of the container formats (EPUB or MHTML) and specifying External, CSS file will be encapsulated into the output package.

Examples

Shows how to work with CSS stylesheets that an HTML conversion creates.

public void ExternalCssFilenames()
{
    Document doc = new Document(MyDir + "Rendering.docx");

    // Create an "HtmlFixedSaveOptions" object, which we can pass to the document's "Save" method
    // to modify how we convert the document to HTML.
    HtmlSaveOptions options = new HtmlSaveOptions();

    // Set the "CssStylesheetType" property to "CssStyleSheetType.External" to
    // accompany a saved HTML document with an external CSS stylesheet file.
    options.CssStyleSheetType = CssStyleSheetType.External;

    // Below are two ways of specifying directories and filenames for output CSS stylesheets.
    // 1 -  Use the "CssStyleSheetFileName" property to assign a filename to our stylesheet:
    options.CssStyleSheetFileName = ArtifactsDir + "SavingCallback.ExternalCssFilenames.css";

    // 2 -  Use a custom callback to name our stylesheet:
    options.CssSavingCallback =
        new CustomCssSavingCallback(ArtifactsDir + "SavingCallback.ExternalCssFilenames.css", true, false);

    doc.Save(ArtifactsDir + "SavingCallback.ExternalCssFilenames.html", options);
}

/// <summary>
/// Sets a custom filename, along with other parameters for an external CSS stylesheet.
/// </summary>
private class CustomCssSavingCallback : ICssSavingCallback
{
    public CustomCssSavingCallback(string cssDocFilename, bool isExportNeeded, bool keepCssStreamOpen)
    {
        mCssTextFileName = cssDocFilename;
        mIsExportNeeded = isExportNeeded;
        mKeepCssStreamOpen = keepCssStreamOpen;
    }

    public void CssSaving(CssSavingArgs args)
    {
        // We can access the entire source document via the "Document" property.
        Assert.True(args.Document.OriginalFileName.EndsWith("Rendering.docx"));

        args.CssStream = new FileStream(mCssTextFileName, FileMode.Create);
        args.IsExportNeeded = mIsExportNeeded;
        args.KeepCssStreamOpen = mKeepCssStreamOpen;

        Assert.True(args.CssStream.CanWrite);
    }

    private readonly string mCssTextFileName;
    private readonly bool mIsExportNeeded;
    private readonly bool mKeepCssStreamOpen;
}

See Also

HtmlSaveOptions.CssStyleSheetFileName HtmlSaveOptions.DocumentPartSavingCallback