Excel worksheet protection

The following example demonstrates how to protect a worksheet.

Note that specifying advanced settings like sheet password or allowing some objects to be editable is supported only for XLSX file format.

Screenshot of Excel worksheet protected with GemBox.Spreadsheet
Excel worksheet protected with GemBox.Spreadsheet
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("Sheet Protection");

        worksheet.Cells[0, 2].Value = "Only cells from A1 to A10 are editable.";

        for (int i = 0; i < 10; i++)
        {
            var cell = worksheet.Cells[i, 0];
            cell.SetValue(i);
            cell.Style.Locked = false;
        }

        worksheet.Protected = true;

        // ProtectionSettings class is supported only for XLSX file format.
        worksheet.Cells[2, 2].Value = "Inserting columns is allowed (only supported for XLSX file format).";
        var protectionSettings = worksheet.ProtectionSettings;
        protectionSettings.AllowInsertingColumns = true;

        worksheet.Cells[3, 2].Value = "Sheet password is 123 (only supported for XLSX file format).";
        protectionSettings.SetPassword("123");

        workbook.Save("Sheet Protection.%OutputFileType%");
    }
}
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("Sheet Protection")

        worksheet.Cells(0, 2).Value = "Only cells from A1 to A10 are editable."

        For i = 0 To 9 Step 1

            Dim cell = worksheet.Cells(i, 0)
            cell.SetValue(i)
            cell.Style.Locked = False
        Next

        worksheet.Protected = True

        ' ProtectionSettings class is supported only for XLSX file format.
        worksheet.Cells(2, 2).Value = "Inserting columns is allowed (only supported for XLSX file format)."
        Dim protectionSettings = worksheet.ProtectionSettings
        protectionSettings.AllowInsertingColumns = True

        worksheet.Cells(3, 2).Value = "Sheet password is 123 (only supported for XLSX file format)."
        protectionSettings.SetPassword("123")

        workbook.Save("Sheet Protection.%OutputFileType%")
    End Sub
End Module

Check next example or download examples from GitHub.