לחסום ולהגן על דפי Excel עם Aspose.Cells עבור .NET

using Aspose.Cells;
using Aspose.Cells.LowCode;

public class SimpleProtectionProvider : AbstractLowCodeProtectionProvider
{
    private readonly string openPwd, writePwd;

    public SimpleProtectionProvider(string openPwd, string writePwd)
    {
        this.openPwd = openPwd;
        this.writePwd = writePwd;
    }

    public override string GetOpenPassword() => openPwd;
    public override string GetWritePassword() => writePwd;
}

var loadOpts = new LowCodeLoadOptions { InputFile = "sensitive.xlsx" };
var saveOpts = new LowCodeSaveOptions { SaveFormat = SaveFormat.Xlsx, OutputFile = "protected.xlsx" };
var provider = new SimpleProtectionProvider("open123", "modify123");
SpreadsheetLocker.Process(loadOpts, saveOpts, provider); 

var removeProvider = new SimpleProtectionProvider(string.Empty, string.Empty);
SpreadsheetLocker.Process(
  new LowCodeLoadOptions { InputFile = "protected.xlsx" },
  new LowCodeSaveOptions { SaveFormat = SaveFormat.Xlsx, OutputFile = "unlocked.xlsx" },
  removeProvider
);

using System;
using Aspose.Cells.LowCode;

namespace ProtectionExample
{
    public class SimpleProtectionProvider : AbstractLowCodeProtectionProvider
    {
        private readonly string openPwd, writePwd;

        public SimpleProtectionProvider(string openPwd, string writePwd)
        {
            this.openPwd = openPwd;
            this.writePwd = writePwd;
        }

        public override string GetOpenPassword() => openPwd;
        public override string GetWritePassword() => writePwd;
    }

    class Program
    {
        static void Main()
        {
            // Apply Protection
            var loadOpts = new LowCodeLoadOptions { InputFile = "report.xlsx" };
            var saveOpts = new LowCodeSaveOptions { SaveFormat = SaveFormat.Xlsx, OutputFile = "report_protected.xlsx" };
            var provider = new SimpleProtectionProvider("OpenMe", "EditMe");
            SpreadsheetLocker.Process(loadOpts, saveOpts, provider);
            Console.WriteLine("Workbook protected successfully.");

            // Remove Protection
            var removeProvider = new SimpleProtectionProvider(string.Empty, string.Empty);
            SpreadsheetLocker.Process(
            new LowCodeLoadOptions { InputFile = "report_protected.xlsx" },
            new LowCodeSaveOptions { SaveFormat = SaveFormat.Xlsx, OutputFile = "report_unlocked.xlsx" },
            removeProvider
            );
            Console.WriteLine("Protection removed successfully.");
        }
    }
}