Convert XLSX | AZW3 to EPUB | XLSX in .NET – Boost Your Publishing Workflow with Sheet & Size

using Sheetize;

// 1️⃣ License registration (one‑time per app)
var license = new Sheetize.License();
license.SetLicense(@"C:\Licenses\Sheetize.eBookConverter_for_.NET.lic");

// 2️⃣ Load the source XLSX (any Excel 97‑2003–2021 workbook)
var loadOptions = new LoadOptions
{
InputFile = @"C:\Docs\QuarterlyReport.xlsx"
};

// 3️⃣ Choose output – EPUB for universal readers or AZW3 for Kindle
var saveOptions = new EbookSaveOptions
{
OutputFile = @"C:\Outputs\QuarterlyReport.epub", // or .azw3
SaveFormat = FileFormatType.Epub // FileFormatType.Azw3 works too
};

// 4️⃣ Run the conversion – all metadata & images are auto‑preserved
EbookConverter.Process(loadOptions, saveOptions);

using Sheetize;

// License setup (same as before)
var license = new Sheetize.License();
license.SetLicense(@"C:\Licenses\Sheetize.eBookConverter_for_.NET.lic");

// Load an e‑book – can be .epub or .azw3
var loadOptions = new LoadOptions
{
InputFile = @"C:\Docs\MarketingGuide.epub"
};

// Export to Excel (XLSX) or CSV, XML, etc.
var saveOptions = new EbookSaveOptions
{
OutputFile = @"C:\Outputs\MarketingGuide.xlsx", // swap .xlsx for .csv, .xml, .tsv, .sqlscript …
SaveFormat = FileFormatType.Xlsx // other choices: Csv, Xml, SqlScript, Dif
};

EbookConverter.Process(loadOptions, saveOptions);

using Sheetize;
using System.IO;

try
{
// 1️⃣ License validation
var license = new Sheetize.License();
license.SetLicense(@"C:\Licenses\Sheetize.eBookConverter_for_.NET.lic");

// 2️⃣ Input verification – must be .epub, .azw3, .xlsx, .xlsb, .csv, etc.
string inputPath = @"C:\Docs\SourceFile.epub";
if (!File.Exists(inputPath))
throw new FileNotFoundException($"Input file not found: {inputPath}");

var allowedInputs = new[] { ".epub", ".azw3", ".xlsx", ".xlsb", ".xlsm", ".csv", ".xml" };
if (!allowedInputs.Contains(Path.GetExtension(inputPath).ToLower()))
throw new NotSupportedException("Unsupported input file type.");

// 3️⃣ Output verification – at least one e‑book format and one spreadsheet format
string outputPath = @"C:\Outputs\Result.xlsx";
var allowedOutputs = new[] { ".epub", ".azw3", ".xlsx", ".xlsb", ".xlsm", ".csv", ".xml", ".tsv", ".sqlscript", ".dif" };
if (!allowedOutputs.Contains(Path.GetExtension(outputPath).ToLower()))
throw new NotSupportedException("Unsupported output file type.");

// 4️⃣ Conversion options
var loadOptions = new LoadOptions { InputFile = inputPath };
var saveOptions = new EbookSaveOptions
{
OutputFile = outputPath,
SaveFormat = Path.GetExtension(outputPath).ToLower() switch
{
".epub" => FileFormatType.Epub,
".azw3" => FileFormatType.Azw3,
".xlsx" => FileFormatType.Xlsx,
".csv" => FileFormatType.Csv,
".xml" => FileFormatType.Xml,
".tsv" => FileFormatType.Tsv,
".sqlscript" => FileFormatType.SqlScript,
".dif" => FileFormatType.Dif,
_ => throw new NotSupportedException("Unknown output format.")
}
};

// 5️⃣ Execute
EbookConverter.Process(loadOptions, saveOptions);
Console.WriteLine($"✅ Conversion succeeded: {outputPath}");
}
catch (Exception ex)
{
// Centralized logging (could be Serilog, NLog, Application Insights, etc.)
Console.Error.WriteLine($"❌ Conversion failed: {ex.GetType().Name} – {ex.Message}");
// Re‑throw if you want the hosting service to handle it
// throw;
}

# 1️⃣ Install the NuGet package
dotnet add package Sheetize

# 2️⃣ Pull a free trial license (no credit‑card required)
# https://purchase.sheetize.com/temp-license/113911

# 3️⃣ Drop the .lic file into your project and apply it via the method.

# 4️⃣ Use the snippets above – compile and watch the magic happen!