SmartTag class

This element specifies the presence of a smart tag around one or more inline structures (runs, images, fields,etc.) within a paragraph.

To learn more, visit the Structured Document Tags or Content Control documentation article.

public class SmartTag : CompositeNode


SmartTag(DocumentBase)Initializes a new instance of the SmartTag class.


Count { get; }Gets the number of immediate children of this node.
CustomNodeId { get; set; }Specifies custom node identifier.
virtual Document { get; }Gets the document to which this node belongs.
Element { get; set; }Specifies the name of the smart tag within the document.
FirstChild { get; }Gets the first child of the node.
HasChildNodes { get; }Returns true if this node has any child nodes.
override IsComposite { get; }Returns true as this node can have child nodes.
LastChild { get; }Gets the last child of the node.
NextSibling { get; }Gets the node immediately following this node.
override NodeType { get; }Returns SmartTag.
ParentNode { get; }Gets the immediate parent of this node.
PreviousSibling { get; }Gets the node immediately preceding this node.
Properties { get; }A collection of the smart tag properties.
Range { get; }Returns a Range object that represents the portion of a document that is contained in this node.
Uri { get; set; }Specifies the namespace URI of the smart tag.


override Accept(DocumentVisitor)Accepts a visitor.
override AcceptEnd(DocumentVisitor)Accepts a visitor for visiting the end of the SmartTag.
override AcceptStart(DocumentVisitor)Accepts a visitor for visiting the start of the SmartTag.
AppendChild<T>(T)Adds the specified node to the end of the list of child nodes for this node.
Clone(bool)Creates a duplicate of the node.
CreateNavigator()Creates navigator which can be used to traverse and read nodes.
GetAncestor(NodeType)Gets the first ancestor of the specified NodeType.
GetAncestor(Type)Gets the first ancestor of the specified object type.
GetChild(NodeType, int, bool)Returns an Nth child node that matches the specified type.
GetChildNodes(NodeType, bool)Returns a live collection of child nodes that match the specified type.
GetEnumerator()Provides support for the for each style iteration over the child nodes of this node.
override GetText()Gets the text of this node and of all its children.
IndexOf(Node)Returns the index of the specified child node in the child node array.
InsertAfter<T>(T, Node)Inserts the specified node immediately after the specified reference node.
InsertBefore<T>(T, Node)Inserts the specified node immediately before the specified reference node.
NextPreOrder(Node)Gets next node according to the pre-order tree traversal algorithm.
PrependChild<T>(T)Adds the specified node to the beginning of the list of child nodes for this node.
PreviousPreOrder(Node)Gets the previous node according to the pre-order tree traversal algorithm.
Remove()Removes itself from the parent.
RemoveAllChildren()Removes all the child nodes of the current node.
RemoveChild<T>(T)Removes the specified child node.
RemoveSmartTags()Removes all SmartTag descendant nodes of the current node.
SelectNodes(string)Selects a list of nodes matching the XPath expression.
SelectSingleNode(string)Selects the first Node that matches the XPath expression.
ToString(SaveFormat)Exports the content of the node into a string in the specified format.
ToString(SaveOptions)Exports the content of the node into a string using the specified save options.


Smart tags is a kind of custom XML markup. Smart tags provide a facility for embedding customer-defined semantics into the document via the ability to provide a basic namespace/name for a run or set of runs within a document.

SmartTag can be a child of a Paragraph or another SmartTag node.

The complete list of child nodes that can occur inside a smart tag consists of BookmarkStart, BookmarkEnd, FieldStart, FieldSeparator, FieldEnd, FormField, Comment, Footnote, Run, SpecialChar, Shape, GroupShape, CommentRangeStart, CommentRangeEnd, SmartTag.


Shows how to create smart tags.

public void Create()
    Document doc = new Document();

    // A smart tag appears in a document with Microsoft Word recognizes a part of its text as some form of data,
    // such as a name, date, or address, and converts it to a hyperlink that displays a purple dotted underline.
    SmartTag smartTag = new SmartTag(doc);

    // Smart tags are composite nodes that contain their recognized text in its entirety.
    // Add contents to this smart tag manually.
    smartTag.AppendChild(new Run(doc, "May 29, 2019"));

    // Microsoft Word may recognize the above contents as being a date.
    // Smart tags use the "Element" property to reflect the type of data they contain.
    smartTag.Element = "date";

    // Some smart tag types process their contents further into custom XML properties.
    smartTag.Properties.Add(new CustomXmlProperty("Day", string.Empty, "29"));
    smartTag.Properties.Add(new CustomXmlProperty("Month", string.Empty, "5"));
    smartTag.Properties.Add(new CustomXmlProperty("Year", string.Empty, "2019"));

    // Set the smart tag's URI to the default value.
    smartTag.Uri = "urn:schemas-microsoft-com:office:smarttags";

    doc.FirstSection.Body.FirstParagraph.AppendChild(new Run(doc, " is a date. "));

    // Create another smart tag for a stock ticker.
    smartTag = new SmartTag(doc);
    smartTag.Element = "stockticker";
    smartTag.Uri = "urn:schemas-microsoft-com:office:smarttags";

    smartTag.AppendChild(new Run(doc, "MSFT"));

    doc.FirstSection.Body.FirstParagraph.AppendChild(new Run(doc, " is a stock ticker."));

    // Print all the smart tags in our document using a document visitor.
    doc.Accept(new SmartTagPrinter());

    // Older versions of Microsoft Word support smart tags.
    doc.Save(ArtifactsDir + "SmartTag.Create.doc");

    // Use the "RemoveSmartTags" method to remove all smart tags from a document.
    Assert.AreEqual(2, doc.GetChildNodes(NodeType.SmartTag, true).Count);


    Assert.AreEqual(0, doc.GetChildNodes(NodeType.SmartTag, true).Count);

/// <summary>
/// Prints visited smart tags and their contents.
/// </summary>
private class SmartTagPrinter : DocumentVisitor
    /// <summary>
    /// Called when a SmartTag node is encountered in the document.
    /// </summary>
    public override VisitorAction VisitSmartTagStart(SmartTag smartTag)
        Console.WriteLine($"Smart tag type: {smartTag.Element}");
        return VisitorAction.Continue;

    /// <summary>
    /// Called when the visiting of a SmartTag node is ended.
    /// </summary>
    public override VisitorAction VisitSmartTagEnd(SmartTag smartTag)
        Console.WriteLine($"\tContents: \"{smartTag.ToString(SaveFormat.Text)}\"");

        if (smartTag.Properties.Count == 0)
            Console.WriteLine("\tContains no properties");
            Console.Write("\tProperties: ");
            string[] properties = new string[smartTag.Properties.Count];
            int index = 0;

            foreach (CustomXmlProperty cxp in smartTag.Properties)
                properties[index++] = $"\"{cxp.Name}\" = \"{cxp.Value}\"";

            Console.WriteLine(string.Join(", ", properties));

        return VisitorAction.Continue;

See Also