BuildingBlockCollection class

A collection of BuildingBlock objects in the document.

To learn more, visit the Aspose.Words Document Object Model (DOM) documentation article.

public class BuildingBlockCollection : NodeCollection


Count { get; }Gets the number of nodes in the collection.
Item { get; }Retrieves a building block at the given index. (2 indexers)


Add(Node)Adds a node to the end of the collection.
Clear()Removes all nodes from this collection and from the document.
Contains(Node)Determines whether a node is in the collection.
GetEnumerator()Provides a simple “foreach” style iteration over the collection of nodes.
IndexOf(Node)Returns the zero-based index of the specified node.
Insert(int, Node)Inserts a node into the collection at the specified index.
Remove(Node)Removes the node from the collection and from the document.
RemoveAt(int)Removes the node at the specified index from the collection and from the document.
ToArray()Copies all building blocks from the collection to a new array of building blocks. (2 methods)


You do not create instances of this class directly. To access a collection of building blocks use the BuildingBlocks property.


Shows ways of accessing building blocks in a glossary document.

public void GlossaryDocument()
    Document doc = new Document();
    GlossaryDocument glossaryDoc = new GlossaryDocument();

    BuildingBlock child1 = new BuildingBlock(glossaryDoc) { Name = "Block 1" };
    BuildingBlock child2 = new BuildingBlock(glossaryDoc) { Name = "Block 2" };
    BuildingBlock child3 = new BuildingBlock(glossaryDoc) { Name = "Block 3" };
    BuildingBlock child4 = new BuildingBlock(glossaryDoc) { Name = "Block 4" };
    BuildingBlock child5 = new BuildingBlock(glossaryDoc) { Name = "Block 5" };

    Assert.AreEqual(5, glossaryDoc.BuildingBlocks.Count);

    doc.GlossaryDocument = glossaryDoc;

    // There are various ways of accessing building blocks.
    // 1 -  Get the first/last building blocks in the collection:
    Assert.AreEqual("Block 1", glossaryDoc.FirstBuildingBlock.Name);
    Assert.AreEqual("Block 5", glossaryDoc.LastBuildingBlock.Name);

    // 2 -  Get a building block by index:
    Assert.AreEqual("Block 2", glossaryDoc.BuildingBlocks[1].Name);
    Assert.AreEqual("Block 3", glossaryDoc.BuildingBlocks.ToArray()[2].Name);

    // 3 -  Get the first building block that matches a gallery, name and category:
    Assert.AreEqual("Block 4", 
        glossaryDoc.GetBuildingBlock(BuildingBlockGallery.All, "(Empty Category)", "Block 4").Name);

    // We will do that using a custom visitor,
    // which will give every BuildingBlock in the GlossaryDocument a unique GUID
    GlossaryDocVisitor visitor = new GlossaryDocVisitor();

    // In Microsoft Word, we can access the building blocks via "Insert" -> "Quick Parts" -> "Building Blocks Organizer".
    doc.Save(ArtifactsDir + "BuildingBlocks.GlossaryDocument.dotx"); 

/// <summary>
/// Gives each building block in a visited glossary document a unique GUID.
/// Stores the GUID-building block pairs in a dictionary.
/// </summary>
public class GlossaryDocVisitor : DocumentVisitor
    public GlossaryDocVisitor()
        mBlocksByGuid = new Dictionary<Guid, BuildingBlock>();
        mBuilder = new StringBuilder();

    public string GetText()
        return mBuilder.ToString();

    public Dictionary<Guid, BuildingBlock> GetDictionary()
        return mBlocksByGuid;

    public override VisitorAction VisitGlossaryDocumentStart(GlossaryDocument glossary)
        mBuilder.AppendLine("Glossary document found!");
        return VisitorAction.Continue;

    public override VisitorAction VisitGlossaryDocumentEnd(GlossaryDocument glossary)
        mBuilder.AppendLine("Reached end of glossary!");
        mBuilder.AppendLine("BuildingBlocks found: " + mBlocksByGuid.Count);
        return VisitorAction.Continue;

    public override VisitorAction VisitBuildingBlockStart(BuildingBlock block)
        block.Guid = Guid.NewGuid();
        mBlocksByGuid.Add(block.Guid, block);
        return VisitorAction.Continue;

    public override VisitorAction VisitBuildingBlockEnd(BuildingBlock block)
        mBuilder.AppendLine("\tVisited block \"" + block.Name + "\"");
        mBuilder.AppendLine("\t Type: " + block.Type);
        mBuilder.AppendLine("\t Gallery: " + block.Gallery);
        mBuilder.AppendLine("\t Behavior: " + block.Behavior);
        mBuilder.AppendLine("\t Description: " + block.Description);

        return VisitorAction.Continue;

    private readonly Dictionary<Guid, BuildingBlock> mBlocksByGuid;
    private readonly StringBuilder mBuilder;

See Also