C#でワークシートにパスワードを設定する方法: xlsxファイル対応 Excel操作 C# ガイド

using IronXL;

// Load the workbook
WorkBook workBook = WorkBook.Load("financial-report.xlsx");

// Protect each worksheet with a different password
workBook.GetWorkSheet("Summary").ProtectSheet("SummaryPass123");
workBook.GetWorkSheet("Details").ProtectSheet("DetailsSecure456");
workBook.GetWorkSheet("Charts").ProtectSheet("ChartsProtect789");

// Save the workbook with all protections applied
workBook.SaveAs("protected-financial-report.xlsx");

Imports IronXL

' Load the workbook
Dim workBook As WorkBook = WorkBook.Load("financial-report.xlsx")

' Protect each worksheet with a different password
workBook.GetWorkSheet("Summary").ProtectSheet("SummaryPass123")
workBook.GetWorkSheet("Details").ProtectSheet("DetailsSecure456")
workBook.GetWorkSheet("Charts").ProtectSheet("ChartsProtect789")

' Save the workbook with all protections applied
workBook.SaveAs("protected-financial-report.xlsx")

using IronXL;

// Load a workbook and protect specific worksheets based on content
WorkBook workBook = WorkBook.Load("employee-data.xlsx");

foreach (WorkSheet sheet in workBook.WorkSheets)
{
    // Check if the sheet name contains sensitive keywords
    if (sheet.Name.Contains("Salary") || sheet.Name.Contains("Personal"))
    {
        // Apply stronger password protection to sensitive sheets
        sheet.ProtectSheet($"Secure_{sheet.Name}_2024!");
    }
    else
    {
        // Apply standard protection to other sheets
        sheet.ProtectSheet("StandardProtection");
    }
}

// Save the selectively protected workbook
workBook.SaveAs("employee-data-protected.xlsx");

Imports IronXL

' Load a workbook and protect specific worksheets based on content
Dim workBook As WorkBook = WorkBook.Load("employee-data.xlsx")

For Each sheet As WorkSheet In workBook.WorkSheets
    ' Check if the sheet name contains sensitive keywords
    If sheet.Name.Contains("Salary") OrElse sheet.Name.Contains("Personal") Then
        ' Apply stronger password protection to sensitive sheets
        sheet.ProtectSheet($"Secure_{sheet.Name}_2024!")
    Else
        ' Apply standard protection to other sheets
        sheet.ProtectSheet("StandardProtection")
    End If
Next

' Save the selectively protected workbook
workBook.SaveAs("employee-data-protected.xlsx")

using IronXL;
using System;

// Load the protected workbook
WorkBook workBook = WorkBook.Load("multi-protected.xlsx");

// Counter for tracking operations
int unprotectedCount = 0;

// Iterate through all worksheets and remove protection
foreach (WorkSheet sheet in workBook.WorkSheets)
{
    try
    {
        sheet.UnprotectSheet();
        unprotectedCount++;
        Console.WriteLine($"Unprotected: {sheet.Name}");
    }
    catch (Exception ex)
    {
        Console.WriteLine($"Failed to unprotect {sheet.Name}: {ex.Message}");
    }
}

Console.WriteLine($"Successfully unprotected {unprotectedCount} worksheets");

// Save the unprotected workbook
workBook.SaveAs("multi-unprotected.xlsx");

Imports IronXL
Imports System

' Load the protected workbook
Dim workBook As WorkBook = WorkBook.Load("multi-protected.xlsx")

' Counter for tracking operations
Dim unprotectedCount As Integer = 0

' Iterate through all worksheets and remove protection
For Each sheet As WorkSheet In workBook.WorkSheets
    Try
        sheet.UnprotectSheet()
        unprotectedCount += 1
        Console.WriteLine($"Unprotected: {sheet.Name}")
    Catch ex As Exception
        Console.WriteLine($"Failed to unprotect {sheet.Name}: {ex.Message}")
    End Try
Next

Console.WriteLine($"Successfully unprotected {unprotectedCount} worksheets")

' Save the unprotected workbook
workBook.SaveAs("multi-unprotected.xlsx")