Question

Excel interop permissions issue?

Asked by: Chaosian

VB .NET 2005 (ASP.NET); Excel Interop 11 (Excel 2003); Windows 2003

I've got an app that needs to use the Excel Interop to generate a spreadsheet. This works great on my machine. :)

When I put the page on the server, I get a COM access exception. When I look in the registry, the COM id matches the Excel interop id in the DCOM tree in Component Services. Through Component Services, I have given both the ASPNET user and the guest internet use full permissions to the DCOM object. I've also done the same through explorer for Excel.exe.

The stack trace is:
[UnauthorizedAccessException: Retrieving the COM class factory for component with CLSID {00024500-0000-0000-C000-000000000046} failed due to the following error: 80070005.]
   ExcelHelper.FormatWorksheet(String fileName, String lineNumber, Int32 rowCount) +35
   ExcelHelper.GenerateWorkDocument(String templateName, String fileName, Int32 lineId) +221
   Secure_ViewWorkTickets.Page_Load(Object sender, EventArgs e) +97
   System.Web.UI.Control.OnLoad(EventArgs e) +98
   System.Web.UI.Control.LoadRecursive() +71
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +4310

Any suggestions as to what I might be doing wrong?

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Asked On
2007-05-08 at 08:28:29ID22559333
Tags

excel

,

com

,

class

,

interop

Topics

DCOM

,

Programming for ASP.NET

,

Microsoft Visual Basic.Net

Participating Experts
2
Points
500
Comments
4

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Answers

 

by: samtran0331Posted on 2007-05-08 at 08:37:46ID: 19050714

>>I have given both the ASPNET user and the guest internet use full permissions to the DCOM object
Have you tried giving full permissions to NETWORK SERVICE ...maybe the IUSR_servername acct too?

 

by: ChaosianPosted on 2007-05-08 at 08:47:52ID: 19050805

The IUSR_ account is the guest account, so yes.

I didn't give the network service account permissions, since the error (see below) didn't indicate that as an option. I'll go try that.

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

ASP.NET is not authorized to access the requested resource. Consider granting access rights to the resource to the ASP.NET request identity. ASP.NET has a base process identity (typically {MACHINE}\ASPNET on IIS 5 or Network Service on IIS 6) that is used if the application is not impersonating. If the application is impersonating via <identity impersonate="true"/>, the identity will be the anonymous user (typically IUSR_MACHINENAME) or the authenticated request user.

To grant ASP.NET access to a file, right-click the file in Explorer, choose "Properties" and select the Security tab. Click "Add" to add the appropriate user or group. Highlight the ASP.NET account, and check the boxes for the desired access.

 

by: ChaosianPosted on 2007-05-08 at 08:51:29ID: 19050843

(expletives removed)

That worked. Thanks for the advice. :) Maybe if I read the whole error and remembered W2003 runs IIS 6?



 

by: HershPosted on 2010-08-10 at 00:28:48ID: 33397516

Windows 2008 server R2-IIS7.5- Couldnot find Microsoft Excel Application in dcom config.

20120131-EE-VQP-002

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