Append to excel file with ClosedXML

Question

I need to append new data to existing excel file created with ClosedXML.

How can I append to an excel file using ClosedXML? How can I get the row number of the last record and append to that or is there something other?

Thanks!

Answer 1

Open the existing workbook and then use the Last*Used methods:

XLWorkbook Workbook = new XLWorkbook(@"C:\existing_excel_file.xlsx");
IXLWorksheet Worksheet = Workbook.Worksheet("Name or index of the sheet to use");

int NumberOfLastRow = Worksheet.LastRowUsed().RowNumber();
IXLCell CellForNewData = Worksheet.Cell(NumberOfLastRow + 1, 1);

And then use one of the following depending on your data:

CellForNewData.SetValue(data);
CellForNewData.InsertData(data2);

CellForNewData.InsertTable(datatable);

For more information see the documentation under Inserting Data or Inserting Tables.