Question

I am using IExcelDataReader to reader to read a excel sheet using following code:

private static IExcelDataReader FetchDataReaderForExcel(HttpPostedFile file)
{
    IExcelDataReader dataReader = null;

    if (null != file)
    {
        string fileExtension = Path.GetExtension(file.FileName);

        switch (fileExtension)
        {
            case ".xls":
                dataReader = ExcelReaderFactory.CreateBinaryReader(file.InputStream);
                break;
            case ".xlsx":
                dataReader = ExcelReaderFactory.CreateOpenXmlReader(file.InputStream);
                break;
            default:
                dataReader = null;
                break;
        }
    }

    return dataReader;
}

When i am reading the excel sheet using this method sometime i am not able to read the data correctly. Sometime it is not able to read column other time it is not able to read the entire data. I need to format each column to normal text and then upload again, it works then. Excel contains data contains integer, string, datetime, hyperlink. Can anyone tell me what could be the problem or alternative for this?

Answer 1

I’m using oledb and it works perfect for me. Here is my example:

    using (OleDbConnection con = new OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + Filename + ";Extended Properties=\"Excel 12.0 Xml;HDR=YES\""))
    {
        //
        string listName = "Sheet1";
        con.Open();
        try
        {
            DataSet ds = new DataSet();
            OleDbDataAdapter odb = new OleDbDataAdapter("select * from [" + listName + "$]", con);
            odb.Fill(ds);
            con.Close();
            foreach (DataRow myrow in ds.Tables[0].Rows)
            {

                Object[] cells = myrow.ItemArray;
                if (cells[0].ToString().Length > 0 || cells[1].ToString().Length > 0 || cells[2].ToString().Length > 0)
                {
                    /*
                    cells[0]
                    cells[1]
                    cells[2]
                    are getting values
                    */

                }
            }


        }
        catch (Exception ex)
        {
            return null;
        }
    }

OLEDB.12.0 works with both .xls and .xlsx