Excel to DataTable using EPPlus - excel locked for editing

Question

I'm using the following code to convert an Excel to a datatable using EPPlus:

public DataTable ExcelToDataTable(string path)
{
    var pck = new OfficeOpenXml.ExcelPackage();
    pck.Load(File.OpenRead(path));
    var ws = pck.Workbook.Worksheets.First();
    DataTable tbl = new DataTable();
    bool hasHeader = true;
    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);
    }
    pck.Dispose();
    return tbl;
}

It creates the Excel, however, when I try to open it, it gives me the message that it is locked for editing by another user and that I can only open it in Read-Only mode.

I thought using:

pck.Dispose();

would solve the issue, however I'm still getting the same error.

Also, when I try to delete the file, I get the message: The action can't be completed because the file is open in WebDev.WebServer40.EXE.

Any ideas how to resolve this? Thanks in advance. :)

Answer 1

I see, that's what i've posted recently here(now corrected). It can be improved since the ExcelPackage and the FileStream(from File.OpenRead) are not disposed after using.

public static DataTable GetDataTableFromExcel(string path, bool hasHeader = true)
{
    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();
        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 (int rowNum = startRow; rowNum <= ws.Dimension.End.Row; rowNum++)
        {
            var wsRow = ws.Cells[rowNum, 1, rowNum, ws.Dimension.End.Column];
            DataRow row = tbl.Rows.Add();
            foreach (var cell in wsRow)
            {
                row[cell.Start.Column - 1] = cell.Text;
            }
        }
        return tbl;
    }
}