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);

Conclusion

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

You can refer to our WinForms PDF feature tour page to know about its other groundbreaking feature representations and documentation, and how to quickly get started for configuration specifications. You can also explore our 
WinForms PDF example to understand how to create and manipulate data.

For current customers, you can check out our components from the License and Downloads page. If you are new to Syncfusion, you can try our 30-day free trial to check out our other controls.

If you have any queries or require clarifications, please let us know in the comments section below. You can also contact us through our support forums, Direct-Trac, or feedback portal. We are always happy to assist you!