如何在 C# 中為工作表設定密碼

保護多個工作表

處理包含多個工作表的複雜工作簿時，您可能需要套用不同的保護策略。 以下是如何使用唯一密碼保護多個工作表的方法：

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");

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");

This approach is particularly useful when managing worksheets that contain different levels of sensitive information. You can also combine worksheet protection with workbook-level password protection for enhanced security.

當使用者嘗試開啟受保護的工作表時會發生什麼？

當使用者嘗試在 Excel 中修改受保護的工作表時，系統會提示他們輸入密碼。 如果沒有正確的密碼，他們只能查看內容，但無法進行任何更改。 這種保護措施在不同版本的 Excel 和其他支援 Excel 格式的電子表格應用程式中仍然有效。

在不同情況下使用受保護的工作表

IronXL 的工作表保護功能與其他 Excel 操作無縫整合。 You can still perform read operations, extract data, and even convert the file to different formats while maintaining the protection status.

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");

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");

大量解除工作表保護

處理多個受保護的工作表時，您可能需要一次取消所有工作表的保護。 以下是一種有效的方法：

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");

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");