How to convert multiple xls files to a single WinForms PDF document?

To convert multiple xls files to a single WinForms PDF, convert each excel file to PDF and merge the resultant. Below code snippet illustrates the same.

C#:

//Get files from the specified directory
string[] files = Directory.GetFiles("../../Data", "*.xls");
//Create a new PDF document
PdfDocument mergeDocument = new PdfDocument();
// Iterate the multiple .xls files to merge in single PDF.
foreach (string file in files)
{
//Create a new excel to PDF converter
ExcelToPdfConverter converter = new ExcelToPdfConverter(file);
//convert the excel document to PDF
PdfDocument tempDoc = converter.Convert();
using (MemoryStream ms = new MemoryStream())
{
//Save  the temporary PDF document
tempDoc.Save(ms);
//Close the temp document
tempDoc.Close(true);
//Merges the converted PDF document from excel.
mergeDocument.Append(new PdfLoadedDocument(ms));
}
}
//Save the document and dispose it.
mergeDocument.Save("Output.pdf");
mergeDocument.Close(true);

Note:

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Conclusion:

I hope you enjoyed learning about how to convert multiple xls files to a single WinForms PDF document.

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