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Set Page Orientation of RadGrid Excel Export to Landscape

Problem

How can I set the Page Orientation of Excel Export to Landscape in XLSX mode?

Description

The Landscape orientation could be set by using the WorkSheetPageSetup of the WorkBook. By default, the page orientation is set to Portrait.

Solution

  • Subscribe to the OnGridExporting event of the RadGrid control.

  • Get a reference to the XlsxFormatProvider, Workbook, and WorksheetPageSetup.

    if (e.ExportType == ExportType.ExcelXlsx)
    {
       XlsxFormatProvider xlsxProvider = new XlsxFormatProvider();
       Workbook workBook = xlsxProvider.Import(Encoding.Default.GetBytes(e.ExportOutput));
       WorksheetPageSetup pageSetup = workBook.ActiveWorksheet.WorksheetPageSetup;
    } 
    
  • Set the PageOrientation property to Landscape:

     pageSetup.PageOrientation = PageOrientation.Landscape;
    
  • Send the data in the response to be downloaded on the client:

    byte[] data = null;
    using (MemoryStream ms = new MemoryStream())
    {
       xlsxProvider.Export(workBook, ms);
       data = ms.ToArray(); // get the byte data of the document
    }
    // send the data in the response for download
    Response.Clear();
    Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
    Response.Headers.Remove("Content-Disposition");
    Response.AppendHeader("Content-Disposition", "attachment; filename=" + RadGrid1.ExportSettings.FileName + ".xlsx");
    Response.BinaryWrite(data);
    Response.End();
    

    A screenshot representing before and after implementing the abovementioned approach:

    Excel Landscape orientation

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