Как да конвертирате Excel в PDF с .NET

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

// Define the path to your Excel file
string excelFilePath = "financial-report-template.xlsx";

// Ensure the file exists
if (!File.Exists(excelFilePath))
{
    throw new FileNotFoundException("The specified Excel file was not found.", excelFilePath);
}

// Create output directory if it doesn't exist
string outputDirectory = "result";
if (!Directory.Exists(outputDirectory))
{
    Directory.CreateDirectory(outputDirectory);
}

// Create the LowCode load options for the source file
LowCodeLoadOptions loadOptions = new LowCodeLoadOptions();
loadOptions.InputFile = excelFilePath;

// Create the LowCode PDF save options
LowCodePdfSaveOptions pdfSaveOptions = new LowCodePdfSaveOptions();

// Configure PDF-specific settings
PdfSaveOptions pdfOptions = new PdfSaveOptions();
pdfOptions.OnePagePerSheet = true;  // This is the key setting for our requirement

// Optionally set additional PDF options
pdfOptions.Compliance = PdfCompliance.PdfA1b;  // For archival compliance if needed
pdfOptions.AllColumnsInOnePagePerSheet = true; // Ensure all columns fit on one page

// Apply the PDF options to our save options
pdfSaveOptions.PdfOptions = pdfOptions;

// Set the output file path
string outputFilePath = Path.Combine(outputDirectory, "FinancialReport.pdf");
pdfSaveOptions.OutputFile = outputFilePath;

try
{
    // Process the conversion using the LowCode PDF Converter
    PdfConverter.Process(loadOptions, pdfSaveOptions);
    
    Console.WriteLine($"Conversion completed successfully. PDF saved to: {outputFilePath}");
}
catch (Exception ex)
{
    Console.WriteLine($"Error during conversion: {ex.Message}");
    // Log the exception or handle it according to your application's requirements
}

// Check if the output file was created
if (File.Exists(outputFilePath))
{
    // Open the file using the default PDF viewer (optional)
    try
    {
        System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo
        {
            FileName = outputFilePath,
            UseShellExecute = true
        });
    }
    catch (Exception ex)
    {
        Console.WriteLine($"The file was created but could not be opened: {ex.Message}");
    }
}
else
{
    Console.WriteLine("The output file was not created.");
}

try
{
    // Create the load options
    LowCodeLoadOptions loadOptions = new LowCodeLoadOptions();
    
    // Verify input file exists before assigning
    if (!File.Exists(excelFilePath))
    {
        throw new FileNotFoundException("Input Excel file not found", excelFilePath);
    }
    
    loadOptions.InputFile = excelFilePath;
    
    // Create and configure PDF save options
    LowCodePdfSaveOptions pdfSaveOptions = new LowCodePdfSaveOptions();
    PdfSaveOptions pdfOptions = new PdfSaveOptions();
    pdfOptions.OnePagePerSheet = true;
    pdfSaveOptions.PdfOptions = pdfOptions;
    pdfSaveOptions.OutputFile = outputFilePath;
    
    // Execute conversion
    PdfConverter.Process(loadOptions, pdfSaveOptions);
    
    // Verify output was created
    if (!File.Exists(outputFilePath))
    {
        throw new Exception("PDF conversion completed but output file was not created");
    }
    
    Console.WriteLine("Conversion successful!");
}
catch (CellsException cellsEx)
{
    // Handle Aspose.Cells specific exceptions
    Console.WriteLine($"Aspose.Cells error: {cellsEx.Message}");
    // Consider logging the exception or custom handling based on cellsEx.Code
}
catch (IOException ioEx)
{
    // Handle file IO exceptions
    Console.WriteLine($"File operation error: {ioEx.Message}");
}
catch (Exception ex)
{
    // Handle other exceptions
    Console.WriteLine($"General error: {ex.Message}");
}

// For high-volume processing, using memory streams can be more efficient
using (MemoryStream outputStream = new MemoryStream())
{
    // Configure save options to use memory stream
    LowCodePdfSaveOptions pdfSaveOptions = new LowCodePdfSaveOptions();
    pdfSaveOptions.OutputStream = outputStream;
    pdfSaveOptions.PdfOptions = new PdfSaveOptions { OnePagePerSheet = true };
    
    // Process the conversion
    PdfConverter.Process(loadOptions, pdfSaveOptions);
    
    // Now you can use the stream as needed (save to file, send via network, etc.)
    outputStream.Position = 0;
    using (FileStream fileStream = File.Create(outputFilePath))
    {
        outputStream.CopyTo(fileStream);
    }
}

// Create PDF options once and reuse
PdfSaveOptions pdfOptions = new PdfSaveOptions { OnePagePerSheet = true };

// Process multiple files
foreach (string excelFile in Directory.GetFiles("input-directory", "*.xlsx"))
{
    LowCodeLoadOptions loadOptions = new LowCodeLoadOptions { InputFile = excelFile };
    LowCodePdfSaveOptions saveOptions = new LowCodePdfSaveOptions
    {
        PdfOptions = pdfOptions,
        OutputFile = Path.Combine("output-directory", Path.GetFileNameWithoutExtension(excelFile) + ".pdf")
    };
    
    PdfConverter.Process(loadOptions, saveOptions);
}

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

namespace ExcelToPdfConverter
{
    class Program
    {
        static void Main(string[] args)
        {
            // Define input and output paths
            string inputDirectory = "input-files";
            string outputDirectory = "result";
            string excelFilePath = Path.Combine(inputDirectory, "financial-report.xlsx");
            
            // Ensure directories exist
            Directory.CreateDirectory(outputDirectory);
            
            try
            {
                Console.WriteLine($"Converting {excelFilePath} to PDF...");
                
                // Simple one-line approach (less customization)
                string quickOutputPath = Path.Combine(outputDirectory, "QuickOutput.pdf");
                PdfConverter.Process(excelFilePath, quickOutputPath);
                Console.WriteLine($"Basic conversion completed: {quickOutputPath}");
                
                // Advanced approach with custom options
                // Setup load options
                LowCodeLoadOptions loadOptions = new LowCodeLoadOptions
                {
                    InputFile = excelFilePath
                };
                
                // Setup PDF save options with specific settings
                LowCodePdfSaveOptions pdfSaveOptions = new LowCodePdfSaveOptions();
                PdfSaveOptions pdfOptions = new PdfSaveOptions
                {
                    OnePagePerSheet = true,
                    Compliance = PdfCompliance.PdfA1b,
                    PrintingPageType = PrintingPageType.ActualSize
                };
                pdfSaveOptions.PdfOptions = pdfOptions;
                
                string customOutputPath = Path.Combine(outputDirectory, "CustomOutput.pdf");
                pdfSaveOptions.OutputFile = customOutputPath;
                
                // Execute the conversion
                PdfConverter.Process(loadOptions, pdfSaveOptions);
                Console.WriteLine($"Advanced conversion completed: {customOutputPath}");
                
                // Batch processing example
                BatchProcessExcelFiles(inputDirectory, outputDirectory);
            }
            catch (Exception ex)
            {
                Console.WriteLine($"Error: {ex.Message}");
            }
            
            Console.WriteLine("Press any key to exit...");
            Console.ReadKey();
        }
        
        static void BatchProcessExcelFiles(string inputDir, string outputDir)
        {
            // Get all Excel files
            string[] excelFiles = Directory.GetFiles(inputDir, "*.xlsx");
            
            if (excelFiles.Length == 0)
            {
                Console.WriteLine("No Excel files found for batch processing.");
                return;
            }
            
            // Create reusable PDF options
            PdfSaveOptions pdfOptions = new PdfSaveOptions
            {
                OnePagePerSheet = true
            };
            
            Console.WriteLine($"Batch processing {excelFiles.Length} files...");
            
            foreach (string file in excelFiles)
            {
                try
                {
                    string fileName = Path.GetFileNameWithoutExtension(file);
                    string outputPath = Path.Combine(outputDir, $"{fileName}.pdf");
                    
                    // Configure options
                    LowCodeLoadOptions loadOptions = new LowCodeLoadOptions
                    {
                        InputFile = file
                    };
                    
                    LowCodePdfSaveOptions saveOptions = new LowCodePdfSaveOptions
                    {
                        PdfOptions = pdfOptions,
                        OutputFile = outputPath
                    };
                    
                    // Process conversion
                    PdfConverter.Process(loadOptions, saveOptions);
                    Console.WriteLine($"Converted: {Path.GetFileName(file)} -> {Path.GetFileName(outputPath)}");
                }
                catch (Exception ex)
                {
                    Console.WriteLine($"Error processing {Path.GetFileName(file)}: {ex.Message}");
                }
            }
            
            Console.WriteLine("Batch processing completed.");
        }
    }
}