NodeGetAncestor(Type) Method

Gets the first ancestor of the specified object type.

Namespace:  Aspose.Words
Assembly:  Aspose.Words (in Aspose.Words.dll) Version: 21.3.0

ExpandedSyntax

public CompositeNode GetAncestor(
	Type ancestorType
)

Parameters

ancestorType
Type: SystemType
The object type of the ancestor to retrieve.

Return Value

Type: CompositeNode
The ancestor of the specified type or null if no ancestor of this type was found.

ExpandedRemarks

The ancestor type matches if it is equal to ancestorType or derived from ancestorType.

ExpandedExamples

Shows how to find out if a tables are nested.
public void CalculateDepthOfNestedTables()
{
    Document doc = new Document(MyDir + "Nested tables.docx");
    NodeCollection tables = doc.GetChildNodes(NodeType.Table, true);

    for (int i = 0; i < tables.Count; i++)
    {
        Table table = (Table)tables[i];

        // Find out if any cells in the table have other tables as children.
        int count = GetChildTableCount(table);
        Console.WriteLine("Table #{0} has {1} tables directly within its cells", i, count);

        // Find out if the table is nested inside another table, and, if so, at what depth.
        int tableDepth = GetNestedDepthOfTable(table);

        if (tableDepth > 0)
            Console.WriteLine("Table #{0} is nested inside another table at depth of {1}", i,
                tableDepth);
        else
            Console.WriteLine("Table #{0} is a non nested table (is not a child of another table)", i);
    }
}

/// <summary>
/// Calculates what level a table is nested inside other tables.
/// </summary>
/// <returns>
/// An integer indicating the nesting depth of the table (number of parent table nodes).
/// </returns>
private static int GetNestedDepthOfTable(Table table)
{
    int depth = 0;
    Node parent = table.GetAncestor(table.NodeType);

    while (parent != null)
    {
        depth++;
        parent = parent.GetAncestor(typeof(Table));
    }

    return depth;
}

/// <summary>
/// Determines if a table contains any immediate child table within its cells.
/// Do not recursively traverse through those tables to check for further tables.
/// </summary>
/// <returns>
/// Returns true if at least one child cell contains a table.
/// Returns false if no cells in the table contain a table.
/// </returns>
private static int GetChildTableCount(Table table)
{
    int childTableCount = 0;

    foreach (Row row in table.Rows.OfType<Row>())
    {
        foreach (Cell Cell in row.Cells.OfType<Cell>())
        {
            TableCollection childTables = Cell.Tables;

            if (childTables.Count > 0)
                childTableCount++;
        }
    }

    return childTableCount;
}

ExpandedSee Also