Excel workbook protection

Workbook protection allows you to protect structure of a workbook against modifications, such as deleting or renaming of sheets.

Note that workbook protection is supported only for XLSX file format.

The following example demonstrates how to protect a workbook.

Screenshot of Excel workbook protected with GemBox.Spreadsheet

C#
VB.NET

using GemBox.Spreadsheet;

class Program
{
    static void Main(string[] args)
    {
        // If using Professional version, put your serial key below.
        SpreadsheetInfo.SetLicense("FREE-LIMITED-KEY");

        var workbook = new ExcelFile();
        var worksheet = workbook.Worksheets.Add("Workbook Protection");

        // ProtectionSettings class is supported only for XLSX file format.
        var protectionSettings = workbook.ProtectionSettings;
        protectionSettings.ProtectStructure = true;

        worksheet.Cells[0, 0].Value = "Workbook password is 123 (only supported for XLSX file format).";
        protectionSettings.SetPassword("123");

        workbook.Save("Workbook Protection.xlsx");
    }
}

Imports GemBox.Spreadsheet

Module Program

    Sub Main()

        ' If using Professional version, put your serial key below.
        SpreadsheetInfo.SetLicense("FREE-LIMITED-KEY")

        Dim workbook = New ExcelFile
        Dim worksheet = workbook.Worksheets.Add("Workbook Protection")

        ' ProtectionSettings class is supported only for XLSX file format.
        Dim protectionSettings = workbook.ProtectionSettings
        protectionSettings.ProtectStructure = True

        worksheet.Cells(0, 0).Value = "Workbook password is 123 (only supported for XLSX file format)."
        protectionSettings.SetPassword("123")

        workbook.Save("Workbook Protection.xlsx")
    End Sub
End Module

Check next example or download examples from GitHub.