Export to Excel delay when records are too big & formatted RRS feed

  • Question

  • User-1578974752 posted


    Here the values are above 2000 and hece it is taking 4 minutes to open the Excel sheet & some time hang. How can I improve the speed?

    if (Session["dse"] != null)


    ASPEXCELL.ExcelExport.ExportDataSetToExcel((DataSet)Session["dse"], "Data_" + DateTime.Now.ToString() + ".xls");



    Monday, April 12, 2021 2:35 AM


All replies

  • User409696431 posted

    What is the code behind "ASPEXCELL.ExcelExport.ExportDataSetToExcel".  Are you using a library, and if so, which one?

    Is there a reason you are storing the data in session, which may cause memory issues if the dataset is large?

    Monday, April 12, 2021 9:09 AM
  • User-1578974752 posted

    Below is my code in that specific code. it is in a repeater as below.

    protected void ExportToExcel(object sender, EventArgs e)



    Response.Buffer = true;

    Response.AddHeader("content-disposition", "attachment;filename=RepeaterExport.xls");

    Response.Charset = "";

    Response.ContentType = "application/vnd.ms-excel";

    StringWriter sw = new StringWriter();

    HtmlTextWriter hw = new HtmlTextWriter(sw);






    Thursday, April 15, 2021 9:43 AM
  • User409696431 posted

    ExportToExcel exports the contents of a control, rptCustomers.

    How does that relate to ExportDataSetToExcel, which has as its parameters a dataset in Session and an .xls filename?

    And what do you mean that ExportToExcel is in a repeater?  Is it called for each line of the repeater?

    Regardless, if you are handling a large amount of data it will take more time than a small small amount of data.  There is not much you can do about it as far as the ExportToExcel portion goes.

    Friday, April 16, 2021 4:24 AM
  • User-821857111 posted

    You might find that working directly with Excel is quicker: https://www.mikesdotnetting.com/article/278/a-better-way-to-export-gridviews-to-excel

    • Marked as answer by Anonymous Thursday, October 7, 2021 12:00 AM
    Friday, April 16, 2021 5:18 AM