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

Export DataTable to Excel with EPPlus: Preserving Integer Format

When exporting a DataTable containing integer properties to an Excel file using EPPlus, it is essential to retain the original data format. This article addresses this specific need and provides a solution to ensure that integer values are exported correctly.

EPPlus Data Loading

EPPlus offers a convenient method to load data from a DataTable into an Excel worksheet using the LoadFromDataTable() function. By default, EPPlus attempts to infer the data type of each column based on the values in the DataTable. In the case of integer properties, this can lead to undesired conversion to floating-point numbers.

Preserving Integer Format

To ensure that integer properties are exported in their original format, the LoadFromDataTable() function can be used with the true parameter, which specifies that the data types should be preserved. This ensures that integer values are exported as numbers, preserving their integrity.

Example Code

The following code demonstrates how to export a DataTable with integer properties to an Excel file while preserving the data format:

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

This code will load the data from the DataTable into the Excel worksheet named "Accounts", ensuring that the integer properties retain their original format.

By utilizing this approach, you can export DataTables containing integer properties to Excel while preserving the intended data format, allowing for accurate analysis and data integrity.

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