Inserting data into an excel sheet from a DataTable

I’m extracting data from the database into a DataTable and displaying it by binding it to a Repeater control. Now I need to copy the same data into an excel spreadsheet. How can i use the same DataTable to the fill the spreadsheet. Please suggest.


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Method 1

I would suggest to create a real excel-file instead of a html table(what many people do). Therefor i can warmly recommend EPPlus(LGPL license).

Then it is simple. Assuming that you have a button BtnExportExcel:

protected void BtnExcelExport_Click(object sender, System.Web.UI.ImageClickEventArgs e)
    try {
        var pck = new OfficeOpenXml.ExcelPackage();
        var ws = pck.Workbook.Worksheets.Add("Name of the Worksheet");
        // get your DataTable
        var tbl = GetDataTable();
        ws.Cells["A1"].LoadFromDataTable(tbl, true, OfficeOpenXml.Table.TableStyles.Medium6);
        foreach (DataColumn col in tbl.Columns) {
            if (col.DataType == typeof(System.DateTime)) {
                var colNumber = col.Ordinal + 1;
                var range = ws.Cells[1, colNumber, tbl.Rows.Count, colNumber];
                // apply the correct date format, here for germany
                range.Style.Numberformat.Format = "dd.MM.yyyy";
        var dataRange = ws.Cells[ws.Dimension.Address.ToString()];

        Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
        Response.AddHeader("content-disposition", "attachment;  filename=NameOfExcelFile.xlsx");
    } catch (Exception ex) {
        // log exception

Method 2

You can create a .csv file. This is quick and easy, and makes it possible to open it in excel.

This post relates to yours:

Convert DataTable to CSV stream

All methods was sourced from or, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0

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