.NET에서의 Excel 자동화: Aspose.Cells.LowCode의 장점

Install-Package Aspose.Cells

using Aspose.Cells.LowCode;

// 간단한 Excel to CSV 변환
var loadOptions = new LowCodeLoadOptions { InputFile = "quarterly_sales.xlsx" };
var saveOptions = new LowCodeTextSaveOptions { 
    OutputFile = "quarterly_sales.csv",
    Format = TextFormat.Csv
};

var converter = new TextConverter(loadOptions, saveOptions);
converter.Convert();

var saveOptions = new LowCodeTextSaveOptions { 
    OutputFile = "quarterly_sales.csv",
    Format = TextFormat.Csv,
    Delimiter = ';'  // 쉼표 대신 세미콜론 사용
};

using Aspose.Cells.LowCode;

var loadOptions = new LowCodeLoadOptions { InputFile = "product_catalog.xlsx" };
var jsonOptions = new LowCodeJsonSaveOptions { 
    OutputFile = "product_catalog.json",
    IndentOutput = true
};

var jsonConverter = new JsonConverter(loadOptions, jsonOptions);
jsonConverter.Convert();

using Aspose.Cells.LowCode;

var loadOptions = new LowCodeLoadOptions { InputFile = "financial_report.xlsx" };
var htmlOptions = new LowCodeHtmlSaveOptions { 
    OutputFile = "financial_report.html",
    ExportImagesAsBase64 = true  // HTML에 이미지를 직접 포함
};

var htmlConverter = new HtmlConverter(loadOptions, htmlOptions);
htmlConverter.Convert();

using Aspose.Cells.LowCode;

var loadOptions = new LowCodeLoadOptions { InputFile = "annual_report.xlsx" };
var pdfOptions = new LowCodePdfSaveOptions { 
    OutputFile = "annual_report.pdf",
    Compliance = PdfCompliance.PdfA1b,  // 보관 목적
    EmbedFonts = true
};

var pdfConverter = new PdfConverter(loadOptions, pdfOptions);
pdfConverter.Convert();

using Aspose.Cells.LowCode;

var loadOptions = new LowCodeLoadOptions { InputFile = "sales_dashboard.xlsx" };
var imageOptions = new LowCodeImageSaveOptions { 
    OutputDirectory = "dashboard_images/",
    ImageFormat = ImageFormat.Png,
    ScaleFactor = 2.0  // 더 선명한 이미지를 위한 높은 해상도
};

var imageConverter = new ImageConverter(loadOptions, imageOptions);
imageConverter.Convert();

using Aspose.Cells.LowCode;

// 간단한 보호 제공자 정의
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;
}

// 비밀번호 보호 적용
var loadOptions = new LowCodeLoadOptions { InputFile = "financial_data.xlsx" };
var saveOptions = new LowCodeSaveOptions { 
    SaveFormat = SaveFormat.Xlsx, 
    OutputFile = "financial_data_protected.xlsx" 
};
var provider = new SimpleProtectionProvider("OpenSecure123", "EditSecure456");

SpreadsheetLocker.Process(loadOptions, saveOptions, provider);

// 비밀번호 보호 제거
var removeProvider = new SimpleProtectionProvider(string.Empty, string.Empty);
SpreadsheetLocker.Process(
    new LowCodeLoadOptions { InputFile = "financial_data_protected.xlsx" },
    new LowCodeSaveOptions { 
        SaveFormat = SaveFormat.Xlsx, 
        OutputFile = "financial_data_unlocked.xlsx" 
    },
    removeProvider
);

using Aspose.Cells.LowCode;
using System.IO;

string[] excelFiles = Directory.GetFiles("input_folder", "*.xlsx");

foreach (string file in excelFiles)
{
    string filename = Path.GetFileNameWithoutExtension(file);
    
    var loadOptions = new LowCodeLoadOptions { InputFile = file };
    var saveOptions = new LowCodeTextSaveOptions { 
        OutputFile = $"output_folder/{filename}.csv",
        Format = TextFormat.Csv
    };

    var converter = new TextConverter(loadOptions, saveOptions);
    converter.Convert();
}

using Aspose.Cells.LowCode;
using System.Net.Http;
using System.IO;

// API에서 Excel 파일 다운로드
using (var client = new HttpClient())
{
    byte[] excelData = await client.GetByteArrayAsync("https://api.example.com/reports/latest");
    File.WriteAllBytes("temp_report.xlsx", excelData);
    
    // PDF로 변환
    var loadOptions = new LowCodeLoadOptions { InputFile = "temp_report.xlsx" };
    var pdfOptions = new LowCodePdfSaveOptions { 
        OutputFile = "latest_report.pdf",
        EmbedFonts = true
    };

    var pdfConverter = new PdfConverter(loadOptions, pdfOptions);
    pdfConverter.Convert();
    
    // 임시 파일 정리
    File.Delete("temp_report.xlsx");
}

using Aspose.Cells;

// 애플리케이션 시작 시 라이센스 설정
Metered matered = new Metered();
matered.SetMeteredKey("PublicKey", "PrivateKey");