.NET Framework 4.5.2+
.NET Framework 4.5.2+
.NET Standard 2.0+

Workbook.EndUpdate() Method

Unlocks the Workbook object.

You need an active license for the DevExpress Office File API Subscription or DevExpress Universal Subscription to use this method in production code.

Namespace: DevExpress.Spreadsheet

Assembly: DevExpress.Docs.v21.2.dll


public void EndUpdate()


Enclose your code in the BeginUpdate() - EndUpdate method calls to improve performance when you apply multiple modifications to a document.

Each call to BeginUpdate() must be paired with the EndUpdate call. You can use the try…finally statement to ensure that EndUpdate is always called even if an exception occurs.

The following example shows how to use the BeginUpdate() - EndUpdate methods.

// Create a new document.
Workbook workbook = new Workbook();

    Worksheet worksheet = workbook.Worksheets[0];
    workbook.Unit = DevExpress.Office.DocumentUnit.Point;

    // Create a multiplication table.
    worksheet.Cells["A1"].Value = "*";
    for(int i = 1; i < 11; i++)
        // Create a header column.
        worksheet.Columns["A"][i].Value = i;
        // Create a header row.
        worksheet.Rows["1"][i].Value = i;

    // Multiply values of header cells.
    worksheet.Range["B2:K11"].Formula = "=B$1*$A2";

    // Obtain the data range.
    CellRange tableRange = worksheet.GetDataRange();

    // Specify the row height and column width.
    tableRange.RowHeight = 40;
    tableRange.ColumnWidth = 40;

    // Align the table content.
    tableRange.Alignment.Horizontal = SpreadsheetHorizontalAlignment.Center;
    tableRange.Alignment.Vertical = SpreadsheetVerticalAlignment.Center;

    // Fill the header cells.
    CellRange headerCells = worksheet.Range.Union(worksheet.Range["A1:K1"], worksheet.Range["A2:A11"]);
    headerCells.FillColor = Color.FromArgb(0xf7, 0x9b, 0x77);
    headerCells.Font.Bold = true;

    // Fill cells that contain multiplication results.
    worksheet.Range["B2:K11"].FillColor = Color.FromArgb(0xfe, 0xf2, 0xe4);
See Also