Eksportuj dane do Excela za pomocą EPPlus

I jeśli chcesz pobrać w przeglądarce 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);                          
}

Do pobrania excelsheet w przeglądarce użyj HttpContext.Current.Response zamiast Response w przeciwnym razie otrzymasz Response is not available in this context. błąd.Oto Mój kod

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();

}

Oto fragment do eksportu zestawu danych do Excela:

    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));
        }
    }

I używając wyrażeń:

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

Oto kilka formatowania liczb dla komórek epplusa

//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_-;_-$* \"-\"??_-;_-@_-";