Want to win a PS4? Go Premium and enter to win our High-Tech Treats giveaway. Enter to Win

x
?
Solved

Excel Automation Using C#

Posted on 2006-11-03
2
Medium Priority
?
1,622 Views
Last Modified: 2012-06-27
This is a bit complex so I'll try to explain as best I can:

I want to use Excel Automation inside ASP.NET.  I added the Microsoft.Excel COM object to my solution and everything compiled fine.  When I go to run a page that has an object that includes the automation I get the following error:

Retrieving the COM class factory for component with CLSID {00024500-0000-0000-C000-000000000046} failed due to the following error: 80070005.

All I really want to be able to do is open a workbook (already populated) and use Excel's WORKDAY function.  The question is, can Excel be used inside of an ASP.NET page (via an object, etc.)   I am not locked to this solution so if someone has a better way to do this or an C# implementation of WORKDAY that is just as good (or even better).

Thanks
0
Comment
Question by:techhound
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 2

Accepted Solution

by:
aquila98 earned 2000 total points
ID: 17869550
Hello

Try this:
Imports System.Reflection
Imports System.Runtime.InteropServices
Imports Microsoft.Win32
Imports System.Collections.Generic
Imports Microsoft.Office.Interop.Excel

Public Class TableLoader
    Public Function Load(ByVal path As String, ByRef pctfree As Integer, ByRef pctused As Integer, ByRef definition As String) As ArrayList
        Dim _Ret As ArrayList = New ArrayList
        Dim _XLBook As Workbook
        Dim _XLApp As Application
        Dim _XLSheet As Worksheet
        Dim _XLCell As Range
        Dim i As Integer
        Dim j As Integer
        Dim aTable As Table
        Dim tmp As String


        _XLApp = New Application
        _XLBook = _XLApp.Workbooks.Open(path)
        _XLSheet = CType(_XLBook.Worksheets("Sheet1"), Worksheet)
        _XLCell = CType(_XLSheet.Cells(2, 2), Range)
        pctfree = CType(_XLCell.Value2, Integer)
        _XLCell = CType(_XLSheet.Cells(3, 2), Range)
        pctused = CType(_XLCell.Value2, Integer)
        _XLCell = CType(_XLSheet.Cells(7, 1), Range)
        tmp = CType(_XLCell.Value2, String)
        i = 1
        definition = ""
        While tmp <> "" And i < 50 ' 50 lines maximum
            definition = definition + tmp + vbCrLf
            _XLCell = CType(_XLSheet.Cells(7 + i, 1), Range)
            tmp = CType(_XLCell.Value2, String)
            i = i + 1
        End While

        _XLBook.Close()
        _XLApp.Quit()
        Return _Ret
    End Function

End Class

Is it VB.Net code but it is not that hard to code equivalence in C#. You will need the following references:
Microsoft excel 11.0 object library (com)
and microsoft office object library (com)
microsoft visual basic for applications extensinility (com)
microsoft.office.tools.excel (.net)
microsoft.visualstudio.tools.application.runtime
0
 

Author Comment

by:techhound
ID: 17869835
I found the solution on the Web.  Excel was not configured for DCOM for user ASPNET.  See http://blog.crowe.co.nz/archive/2006/03/02/589.aspx. I'll give you credit because this is a valid alternative solution.
0

Featured Post

Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction Hi all and welcome to my first article on Experts Exchange. A while ago, someone asked me if i could do some tutorials on object oriented programming. I decided to do them on C#. Now you may ask me, why's that? Well, one of the re…
Performance in games development is paramount: every microsecond counts to be able to do everything in less than 33ms (aiming at 16ms). C# foreach statement is one of the worst performance killers, and here I explain why.
How to fix incompatible JVM issue while installing Eclipse While installing Eclipse in windows, got one error like above and unable to proceed with the installation. This video describes how to successfully install Eclipse. How to solve incompa…
We’ve all felt that sense of false security before—locking down external access to a database or component and feeling like we’ve done all we need to do to secure company data. But that feeling is fleeting. Attacks these days can happen in many w…

618 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question