Question

On my local machine everything works well but..

After publishing my MVC4 web project there is a problem with an uploaded Excel file.
I load an HttpPostedFileBase and send the path to my BL. There I load it to dataTable and on my second call I get it to a list.

Here is the code..

Controller:

  [HttpPost]
    public ActionResult UploadCards(HttpPostedFileBase file, string sheetName, int ProductID)
    {
        try
        {
            if (file == null || file.ContentLength == 0)
                throw new Exception("The user not selected a file..");

            var fileName = Path.GetFileName(file.FileName);
            var path = Server.MapPath("/bin");

            if (!Directory.Exists(path))
                Directory.CreateDirectory(path);

            path = Path.Combine(path, fileName);
            file.SaveAs(path);

            DataTable cardsDataTable = logic.LoadXLS(path, sheetName);
            cardsToUpdate = logic.getUpdateCards(cardsDataTable, ProductID);

            foreach (var item in cardsToUpdate)
            {
                if (db.Cards.ToList().Exists(x => x.SerialNumber == item.SerialNumber))
                    cardsToUpdate.Remove(item);
            }
            Session["InfoMsg"] = "click update to finish";
        }
        catch (Exception ex)
        {
            Session["ErrorMsg"] = ex.Message;
        }
        return View("viewUploadCards", cardsToUpdate);
    }

BL:

     public DataTable LoadXLS(string strFile, String sheetName)
    {
        DataTable dtXLS = new DataTable(sheetName);

        try
        {
            string strConnectionString = "";

            if (strFile.Trim().EndsWith(".xlsx"))
                strConnectionString = string.Format("Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=\"Excel 12.0 Xml;HDR=YES;IMEX=1\";", strFile);
            else if (strFile.Trim().EndsWith(".xls"))
                strConnectionString = string.Format("Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0};Extended Properties=\"Excel 8.0;HDR=Yes;IMEX=1\";", strFile);

            OleDbConnection SQLConn = new OleDbConnection(strConnectionString);

            SQLConn.Open();

            OleDbDataAdapter SQLAdapter = new OleDbDataAdapter();

            string sql = "SELECT * FROM [" + sheetName + "$]";

            OleDbCommand selectCMD = new OleDbCommand(sql, SQLConn);

            SQLAdapter.SelectCommand = selectCMD;

            SQLAdapter.Fill(dtXLS);

            SQLConn.Close();

        }

        catch (Exception ex)
        {
            string res = ex.Message;
            return null;
        }

        return dtXLS;
    }

and:

    public List<Card> getUpdateCards(DataTable dt, int prodId)
    {
        List<Card> cards = new List<Card>();
        try
        {
            Product product = db.Products.Single(p => p.ProductID == prodId);
            foreach (DataRow row in dt.Rows)
            {
                cards.Add(new Card
                {
                    SerialNumber = row[0].ToString(),
                    UserName = row[1].ToString(),
                    Password = row[2].ToString(),

                    Activated = false,

                    Month = product.Months,
                    Bandwidth = product.Bandwidth,
                    ProductID = product.ProductID,
                    // Product = product
                });
            }
        }
        catch (Exception ex)
        {
            db.Log.Add(new Log { LogDate = DateTime.Now, LogMsg = "Error : " + ex.Message });

        }
        return cards;
    }

Now I think Windows Azure doesn’t let me save this file because on the middle view when I supposed to see the data – I don’t see it.

I thought of some ways…
one – not saving the file, but I don’t see how to complete the ConnectionString…
second maybe there is a way to save the file there.

I’d love to get suggestions for solving this problem…

10x and sorry for my bad English =)

Answer 1

I’m embarrassed but I found a similar question here.. Not exactly but it gave me a good direction.

Hare the finally result:

[HttpPost]
    public ActionResult UploadCards(HttpPostedFileBase file, string sheetName, int ProductID)
    {
        IExcelDataReader excelReader = null;
        try
        {
            if (file == null || file.ContentLength == 0)
                throw new Exception("The user not selected a file..");

            if (file.FileName.Trim().EndsWith(".xlsx"))
                excelReader = ExcelReaderFactory.CreateOpenXmlReader(file.InputStream);
            else if (file.FileName.Trim().EndsWith(".xls"))
                excelReader = ExcelReaderFactory.CreateBinaryReader(file.InputStream);
            else
                throw new Exception("Not a excel file");

            cardsToUpdate = logic.getUpdateCards(excelReader.AsDataSet().Tables[sheetName], ProductID);

            foreach (var item in cardsToUpdate)
            {
                if (db.Cards.ToList().Exists(x => x.SerialNumber == item.SerialNumber))
                    cardsToUpdate.Remove(item);
            }
            Session["InfoMsg"] = "Click Update to finish";
        }
        catch (Exception ex)
        {
            Session["ErrorMsg"] = ex.Message;
        }
        finally
        {
            excelReader.Close();
        }
        return View("viewUploadCards", cardsToUpdate);
    }  

10q all.

EDIT: download, reference and using

the dll is avalibale hare
i add the reference to the Excel.dll and i add the using Excel;