How Can I Export a DataTable to Excel Using EPPlus and Preserve Integer Formatting?

Exporting DataTable to Excel with EPPlus While Preserving Integer Format

To export a DataTable to an Excel file using EPPlus, you can employ the following approach:

Solution:

EPPlus offers a straightforward method to export DataTable using the LoadFromDataTable method. This method automatically recognizes and preserves the data types of the columns in the DataTable.

To retain the integrity of integer values, ensure that the properties in your DataTable are defined as integers. EPPlus will intelligently convert these columns to numeric or float formats as appropriate within the Excel file.

Code:

using (ExcelPackage pck = new ExcelPackage(newFile))
{
  ExcelWorksheet ws = pck.Workbook.Worksheets.Add("Accounts");
  ws.Cells["A1"].LoadFromDataTable(dataTable, true);
  pck.Save();
}

By specifying true as the second parameter of LoadFromDataTable, you instruct EPPlus to convert empty cells to null values. This helps maintain data integrity when working with nullable integer fields.

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