Excel is not opening in C#

Question

I tried opening excel but it doesn't work.... Can Anyone help me ....

        string path = Session["dir"].ToString() + "\\" + e.CommandArgument.ToString();
        Excel.Application xlApp;
        Excel.Workbook xlWorkBook;
        Excel.Worksheet xlWorkSheet;
        object misValue = System.Reflection.Missing.Value;

        xlApp = new Excel.ApplicationClass();
        xlWorkBook = xlApp.Workbooks.Open(path, 0, true, 5, "", "", true,Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, "\t", false, false, 0, true, 1, 0);
        xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);
        xlWorkBook.Close(true, misValue, misValue);
        xlApp.Quit();

        releaseObject(xlWorkSheet);
        releaseObject(xlWorkBook);
        releaseObject(xlApp);

Answer 1

The code tries to activate a COM object. One thing to check would be if the user that is configured for the application pool in IIS has Launch and Activation Permisions in the DCOM Config.

Answer 2

Did you try to remove close and quit? If it is not helping try this:

// Start a new workbook in Excel.
        var excel = new Microsoft.Office.Interop.Excel.Application { Visible = true };
        var excelWorkBooks = (Microsoft.Office.Interop.Excel.Workbooks)excel.Workbooks;
        var workbookAdd = (Microsoft.Office.Interop.Excel._Workbook)excelWorkBooks.Add(); // XlWBATemplate.xlWBATWorksheet

        var worksheets = (Microsoft.Office.Interop.Excel.Sheets)workbookAdd.Worksheets;
        var sheet = (Microsoft.Office.Interop.Excel._Worksheet)worksheets.Item[1];
        sheet.Visible = XlSheetVisibility.xlSheetVisible;