Code to open a workbook of excel from a uploaded file

Let us consider a file has been uploaded and it is saved at some where.
We can open the work book as shown below.

FileUpload1.PostedFile.SaveAs(StrFileLoc);
                xl = new Excel.Application();
                wb = (Excel._Workbook)(xl.Workbooks.Open(StrFileLoc, 0, false, 5, "", "", true, Excel.XlPlatform.xlWindows, "\t", false, false, 0, true, false, false));