Export DataTable to Excel with EPPlus

Question

I want to export a data table to an Excel file with EPPlus. That data table has a property with int type, so I want the same format in the Excel file.

Does anyone know way to export a DataTable like this to Excel?

Answer 1

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

That should do the trick for you. If your fields are defined as int EPPlus will properly cast the columns into a number or float.

Answer 2

and if you want to download in browser response

Response.Clear();
Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
Response.AddHeader("content-disposition", "attachment;filename=" + HttpUtility.UrlEncode("Logs.xlsx", System.Text.Encoding.UTF8));

using (ExcelPackage pck = new ExcelPackage())
{
    ExcelWorksheet ws = pck.Workbook.Worksheets.Add("Logs");
    ws.Cells["A1"].LoadFromDataTable(dt, true);                 
    var ms = new System.IO.MemoryStream();
    pck.SaveAs(ms);
    ms.WriteTo(Response.OutputStream);                          
}

Answer 3

For downloading excelsheet in browser use HttpContext.Current.Response instead of Response otherwise you will get Response is not available in this context. error.Here is my code

public void ExporttoExcel(DataTable table, string filename)
{
    HttpContext.Current.Response.Clear();
    HttpContext.Current.Response.ClearContent();
    HttpContext.Current.Response.ClearHeaders();
    HttpContext.Current.Response.Buffer = true;
    HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.UTF8;
    HttpContext.Current.Response.Cache.SetCacheability(HttpCacheability.NoCache);
    HttpContext.Current.Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
    HttpContext.Current.Response.AddHeader("content-disposition", "attachment;filename=GridData.xlsx");


    using (ExcelPackage pack = new ExcelPackage())
    {
        ExcelWorksheet ws = pack.Workbook.Worksheets.Add(filename);
        ws.Cells["A1"].LoadFromDataTable(table, true);
        var ms = new System.IO.MemoryStream();
        pack.SaveAs(ms);
        ms.WriteTo(HttpContext.Current.Response.OutputStream); 
    }

    HttpContext.Current.Response.Flush();
    HttpContext.Current.Response.End();

}

Answer 4

Here is a snippet to export DataSet to Excel:

    private static void DataSetToExcel(DataSet dataSet, string filePath)
    {
        using (ExcelPackage pck = new ExcelPackage())
        {
            foreach (DataTable dataTable in dataSet.Tables)
            {
                ExcelWorksheet workSheet = pck.Workbook.Worksheets.Add(dataTable.TableName);
                workSheet.Cells["A1"].LoadFromDataTable(dataTable, true);
            }

            pck.SaveAs(new FileInfo(filePath));
        }
    }

And using statements:

using OfficeOpenXml;
using System.Data;
using System.IO;

Answer 5

Here are some number formatting for epplus cells

//integer (not really needed unless you need to round numbers, Excel will use default cell properties)
ws.Cells["A1:A25"].Style.Numberformat.Format = "0";

//integer without displaying the number 0 in the cell
ws.Cells["A1:A25"].Style.Numberformat.Format = "#";

//number with 1 decimal place
ws.Cells["A1:A25"].Style.Numberformat.Format = "0.0";

//number with 2 decimal places
ws.Cells["A1:A25"].Style.Numberformat.Format = "0.00";

//number with 2 decimal places and thousand separator
ws.Cells["A1:A25"].Style.Numberformat.Format = "#,##0.00";

//number with 2 decimal places and thousand separator and money symbol
ws.Cells["A1:A25"].Style.Numberformat.Format = "€#,##0.00";

//percentage (1 = 100%, 0.01 = 1%)
ws.Cells["A1:A25"].Style.Numberformat.Format = "0%";

//accounting number format
ws.Cells["A1:A25"].Style.Numberformat.Format = "_-$* #,##0.00_-;-$* #,##0.00_-;_-$* \"-\"??_-;_-@_-";