How convert stream excel file to datatable C#?

Question

I use Epplus to reading xlsx files from stream.

It has a bug , it cant read some columns in my workbook.How can read xlsx files from stream to datatable without epplus ?

my older code:

 public static DataSet ReadExcelFile(Stream stream)
    {
        try
        {
            //2. Reading from a OpenXml Excel file (2007 format; *.xlsx)
            IExcelDataReader excelReader =    
                             ExcelReaderFactory.CreateOpenXmlReader(stream);
            //...
            DataSet result = excelReader.AsDataSet();

            return result;

        }
        catch (Exception x)
        {
            throw x;
        }
    }

I didnt report it, but i tried so much combinations.If there are empty columns in worksheet ,epplus reader cant read correctly column values.

Answer 1

"It has a bug , it cant read some columns in my workbook"

Can you describe the bug, have you reported it or is it already known, what version are you using?

Here's a simple approach to load an excel file into a DataTable with EPPlus.

public static DataTable getDataTableFromExcel(string path)
{
    using (var pck = new OfficeOpenXml.ExcelPackage())
    {
        using (var stream = File.OpenRead(path))
        {
            pck.Load(stream);
        }
        var ws = pck.Workbook.Worksheets.First();  
        DataTable tbl = new DataTable();
        bool hasHeader = true; // adjust it accordingly( i've mentioned that this is a simple approach)
        foreach (var firstRowCell in ws.Cells[1, 1, 1, ws.Dimension.End.Column])
        {
            tbl.Columns.Add(hasHeader ? firstRowCell.Text : string.Format("Column {0}", firstRowCell.Start.Column));
        }
        var startRow = hasHeader ? 2 : 1;
        for (var rowNum = startRow; rowNum <= ws.Dimension.End.Row; rowNum++)
        {
            var wsRow = ws.Cells[rowNum, 1, rowNum, ws.Dimension.End.Column];
            var row = tbl.NewRow();
            foreach (var cell in wsRow)
            {
                row[cell.Start.Column - 1] = cell.Text;
            }
            tbl.Rows.Add(row);
        }
        return tbl;
    }
}

Answer 2

This is way past, however it could still help someone. Apparently some columns in my worksheet were merged, so for example, if columns A and B are merged it only recognizes column A as the one with the value, and so it returns column B as empty, when i call on that particular cell's value(B). To get past this, make sure you know which cells are merged and then grab only the first one and regard the rest of the merged cells as null