CellFormat.HorizontalMerge property

Specifies how the cell is merged horizontally with other cells in the row.

public CellMerge HorizontalMerge { get; set; }


Shows how to merge table cells horizontally.

Document doc = new Document();
DocumentBuilder builder = new DocumentBuilder(doc);

// Insert a cell into the first column of the first row.
// This cell will be the first in a range of horizontally merged cells.
builder.CellFormat.HorizontalMerge = CellMerge.First;
builder.Write("Text in merged cells.");

// Insert a cell into the second column of the first row. Instead of adding text contents,
// we will merge this cell with the first cell that we added directly to the left.
builder.CellFormat.HorizontalMerge = CellMerge.Previous;

// Insert two more unmerged cells to the second row.
builder.CellFormat.HorizontalMerge = CellMerge.None;
builder.Write("Text in unmerged cell.");
builder.Write("Text in unmerged cell.");

doc.Save(ArtifactsDir + "CellFormat.HorizontalMerge.docx");

Prints the horizontal and vertical merge type of a cell.

public void CheckCellsMerged()
    Document doc = new Document(MyDir + "Table with merged cells.docx");
    Table table = doc.FirstSection.Body.Tables[0];

    foreach (Row row in table.Rows.OfType<Row>())
        foreach (Cell cell in row.Cells.OfType<Cell>())

public string PrintCellMergeType(Cell cell)
    bool isHorizontallyMerged = cell.CellFormat.HorizontalMerge != CellMerge.None;
    bool isVerticallyMerged = cell.CellFormat.VerticalMerge != CellMerge.None;
    string cellLocation =
        $"R{cell.ParentRow.ParentTable.IndexOf(cell.ParentRow) + 1}, C{cell.ParentRow.IndexOf(cell) + 1}";

    if (isHorizontallyMerged && isVerticallyMerged)
        return $"The cell at {cellLocation} is both horizontally and vertically merged";
    if (isHorizontallyMerged)
        return $"The cell at {cellLocation} is horizontally merged.";

    return isVerticallyMerged ? $"The cell at {cellLocation} is vertically merged" : $"The cell at {cellLocation} is not merged";

See Also