Microsoft KB Archive/246596

= Cannot use VBScript classes with Application or Session scope =

Article ID: 246596

Article Last Modified on 8/8/2007

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APPLIES TO


 * Microsoft Internet Information Services 5.0

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This article was previously published under Q246596



SYMPTOMS
The VBScript 5.0 engine allows the creation of user defined classes, similar to the Visual Basic classes.

When you attempt to assign a class as an Application variable, the following error message occurs:

Error Type:

Application object, ASP 0197 (0x80004005)

Disallowed object use

Cannot add object with apartment model behavior to the application intrinsic object.

/ /, line 

In addition, when you assign a class to a Session variable, the following error message occurs when you attempt to use the class:

Error Type:

Microsoft VBScript runtime (0x800A01B6)

Object doesn't support this property or method:

/ /, line 



CAUSE
This behavior is by design. There are specific threading issues that prevent this functionality from being exposed at the Application or Session level.



RESOLUTION
Only use VBScript classes with page-level scope.



WORKAROUND
To work around this issue, use Include files to store VBScript classes. To do this, follow these steps:   Save the following ASP code as Convert.inc in a folder with at least Script access: <% Class Convert Function Celsius(F) Celsius = ((F-32)*5)/9 End Function Function Fahrenheit(C) Fahrenheit = ((C*9)/5)+32 End Function End Class %>   Save the following ASP code as Convert.asp in the same folder as the above file: <% @LANGUAGE="VBSCRIPT" %>

<% Set MyConvert = New Convert %> 32F = <%=MyConvert.Celsius(32)%>C 32C = <%=MyConvert.Fahrenheit(32)%>F  When you browse the Convert.asp page, the following should be returned:

32F = 0C 32C = 89.6F

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Note The above example does not preserve class state between pages. In other words, if any variables are created in the class, they will be destroyed when the page goes out of scope.

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MORE INFORMATION
For more information on Microsoft Scripting Technologies, please see the Microsoft Developer Network (MSDN) Web site at the following URL:

http://msdn2.microsoft.com/en-us/library/ms950396.aspx

NoteMicrosoft provides programming examples for illustration only, without warranty either expressed or implied. This includes, but is not limited to, the implied warranties of merchantability or fitness for a particular purpose. This article assumes that you are familiar with the programming language that is being demonstrated and with the tools that are used to create and to debug procedures. Microsoft support engineers can help explain the functionality of a particular procedure, but they will not modify these examples to provide added functionality or construct procedures to meet your specific requirements.

https://partner.microsoft.com/global/30000104

For more information about the support options that are available and about how to contact Microsoft, visit the following Microsoft Web site:

http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS

Keywords: kbpending kbprb KB246596

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