Microsoft Office Interop Excel doesn't save in Windows server 2008

Question

I am using Microsoft Office Excel Interop to create an excel file in ASP.NET C#. Everything is successful when I am running application in Visual Studio 2010. I have published my web application in my own IIS server, it is ok. But when I publish application in Windows Server 2008 , the problem was detected. I looked for much in internet and i have done following, but the problem still was not solved:

1. I have set Application Pool Identity to LocalSystem . In Run -> mmc -32 -> Component Services -> My Computer -> DCOM Config -> Microsoft Excel Application -> right-click -> Properties window: in Identity tab, I have checked all radio buttons in this window.

2. I have set Application Pool Identity to NetworkService , and I have checked all previous radio buttons again.

3. In Run->mmc -32 -> Component Services -> My Computer -> DCOM Config -> Microsoft Excel Application -> right-click -> Properties window: in Security tab: I gave Local Launch and Local Activation for INTERACTIVE, NETWORK SERVICE, IIS_IUSRS users.

   Here is my code which I used Interop Excel :

 Excel.Application xlApp = new Excel.Application(); object misValue = System.Reflection.Missing.Value; Excel.Workbook xlWorkBook = xlApp.Workbooks.Add(misValue); Excel.Worksheet xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1); Workbook.SaveAs(Server.MapPath("DownloadFolder\\\\" + fileName + "_siyahi.xls"));

Answer 1

I found my problem. In my Windows Server system regional settings haven't been United States and I have set worksheet.cells.NumberForm="0.00" in my code.

xlWorkSheet.Cells[rowNumber, 4].NumberFormat = "0.00";

Server doesn't knows this number format . I have changed Format to English (United States) and Current location to United States and my problem solved.