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I am trying to insert a custom HTML table from a code to excel. However, it does not work from the backend side. I always get a raw table string in the cell; however, it works when I open a file and manually copy and paste the cell's value somewhere else, then I get my custom table.

I've been searching for a solution for a few days now, but nothing works for me.

I will appreciate any suggestions.

What I have tried:

string htmlTable = "<table class=\"MsoTableGrid\" border=\"1\" cellspacing=\"0....TABLE CONTENT ETC. </table>

using (var package = new ExcelPackage(file))
    var worksheet = package.Workbook.Worksheets.Add("ReportNamePlaceHolder");

    worksheet.Cells["A1"].IsRichText = true ;
    worksheet.Cells["A1"].RichText.Text = htmlTable;
    worksheet.Cells["A4"].Value = htmlTable;


Updated 6-Jan-22 3:11am

1 solution

You can't just insert HTML content into a cell and expect Excel to render it, Excel doesn't natively support HTML in it's cells. Even using the IsRichText doesn't work because it expects RTF-formatted content.

How can I embed HTML file in excel? - Stack Overflow[^]

Some suggestions include instead embedding a browser viewport within a cell and then rendering it there. I'm not sure if this works, you might need to search around.
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