I am getting this error on live server when I create a excel file with format xlsx, while on local server its working fine. I had used DocumentFormat.OpenXml and ClosedXML library. Please help me to solve this issue. This is my code.
using (XLWorkbook wb = new XLWorkbook()) { wb.Worksheets.Add(dtAgentQuery); wb.Style.Alignment.Horizontal = XLAlignmentHorizontalValues.Center; wb.Style.Font.Bold = true; Response.Clear(); Response.Buffer = true; Response.Charset = ""; Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"; Response.AddHeader("content-disposition", "attachment;filename=GTFKushmha.xlsx"); using (MemoryStream MyMemoryStream = new MemoryStream()) { wb.SaveAs(MyMemoryStream); MyMemoryStream.WriteTo(Response.OutputStream); Response.Flush(); Response.End(); } } Could not load file or assembly 'DocumentFormat.OpenXml, Version=2.7.2.0, Culture=neutral, PublicKeyToken=8fb06cb64d019a17' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)
