Part of a simple DSL for creating Word documents using the Open XML Sdk

gistfile1.cs

    public static class OpenXmlExtensions
    {
        public static Paragraph AppendTextParagraph(this OpenXmlCompositeElement element, string text)
        {
            return AppendTextParagraph(element, text, false, kDefaultFontSize);
        }

        public static Paragraph AppendTextParagraph(this OpenXmlCompositeElement element, string text, bool bold)
        {
            return AppendTextParagraph(element, text, bold, kDefaultFontSize);
        }

        public static Paragraph AppendTextParagraph(this OpenXmlCompositeElement element, string text, bool bold, int fontSize)
        {
            var run = new Run(new Text(text));
            var runProperties = run.PrependChild(new RunProperties(new FontSize { Val = fontSize.ToString() }));
            if (bold)
            {
                runProperties.AppendChild(new Bold());
            }
            var paragraph = new Paragraph(run);
            return element.AppendChild(paragraph);
        }

        public static Paragraph Justify(this Paragraph paragraph, JustificationValues justificationValue)
        {
            var properties = paragraph.GetOrAppend<ParagraphProperties>();
            properties.GetOrAppend<Justification>().Val = justificationValue;

            return paragraph;
        }

        public static T GetOrAppend<T>(this OpenXmlCompositeElement element) where T : OpenXmlElement, new()
        {
            var descendant = element.Descendants<T>().FirstOrDefault();
            if (descendant == null)
            {
                descendant = element.AppendChild(new T());
            }
            return descendant;
        }

    }


// Usage:

// First create a document
var dokument = WordprocessingDocument.Create(fileName, WordprocessingDocumentType.Document);
var mainPart = dokument.AddMainDocumentPart();
var body = SetupStandardDocumentAndBody(mainPart);

// Then edit the body
body.AppentTextParagraph("Yay! I can edit a document").Justify(JustificationValues.Center);
body.AppendTextParagraph("I can even bold stuff", true);