Solved

Excel Automation Using C#

Posted on 2006-11-03
2
1,619 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 500 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

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

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

Extention Methods in C# 3.0 by Ivo Stoykov C# 3.0 offers extension methods. They allow extending existing classes without changing the class's source code or relying on inheritance. These are static methods invoked as instance method. This…
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…
There are cases when e.g. an IT administrator wants to have full access and view into selected mailboxes on Exchange server, directly from his own email account in Outlook or Outlook Web Access. This proves useful when for example administrator want…
Monitoring a network: why having a policy is the best policy? Michael Kulchisky, MCSE, MCSA, MCP, VTSP, VSP, CCSP outlines the enormous benefits of having a policy-based approach when monitoring medium and large networks. Software utilized in this v…

705 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