Convert Excel Range to ADO.NET DataSet or DataTable, etc

Question

I have an Excel spreadsheet that will sit out on a network share drive. It needs to be accessed by my Winforms C# 3.0 application (many users could be using the app and hit

Answer 1

I made method which can take alredy filtered data from Excel Taking filtered data in Range format

        Worksheet sheet = null;
        sheet = (Worksheet)context.cDocumentExcel.Sheets[requiredSheetName];

        DataTable dt = new DataTable();
        sheet.Activate();
        sheet.UsedRange.Select();
        List ranges = new List();
        Range usedrange = sheet.UsedRange;

        foreach (var oneRange in usedrange.SpecialCells(XlCellType.xlCellTypeVisible))
        {
            ranges.Add(oneRange);
        }


        dt = (_makeTableFromRange(ranges));

Converting from Range to DataTable

 private static DataTable _makeTableFromRange(List ranges)
    {
        var table = new DataTable();


        foreach (var range in ranges)
        {
            while (table.Columns.Count < range.Column)
            {
                table.Columns.Add();
            }

            while (table.Rows.Count < range.Row)
            {
                table.Rows.Add();
            }

            table.Rows[range.Row - 1][range.Column - 1] = range.Value2;
        }


        //clean from empty rows
        var filteredRows = table.Rows.Cast().
                        Where(row => !row.ItemArray.All(field => field is System.DBNull ||
                                                                 string.Compare((field as string).Trim(), string.Empty) ==
                                                                 0));
        table = filteredRows.CopyToDataTable();
        return table;
    }