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Article ID: 224422 - Last Review: July 16, 2004 - Revision: 3.2
PRB: Returning a UDT from a VB COM Object Brings an Error
This article was previously published under Q224422
When you return a user-defined data type (UDT) from a Visual Basic COM object, you might get one of the following error messages:
Microsoft VBScript runtime error '800a01a8'
Object required
-or-
Response object error 'ASP 0106 : 80020005'
Type Mismatch
?
An unhandled data type was encountered
User-defined data types are not supported in the current version of Active Server Pages (ASP).
Active Server Pages does not support UDTs, but you can work around this by creating a new class to handle the data in place of the UDT and setting the instancing property to PublicNotCreateable. This will ensure that you can pass the necessary information to and from ASP, as well as ensuring that the class cannot be created outside of the DLL.
This behavior is by design.
Steps to Reproduce Behavior
- Create a Visual Basic ActiveX DLL project called VBUDTPrj.
- Add class module called VBUDTObj.
- Define a UDT as follows:
Public Type TestUDT
strName as String
strDept as String
End Type
- Implement the following method:
Public Function TestMethod() As Variant
Dim udtTestData As TestUDT
udtTestData.strDept = "TestDept"
udtTestData.strName = "TestName"
TestMethod = udtTestData
End Function
- Create an ASP page that calls this method:
<%
Dim objTest, udtData
Set objTest = Server.CreateObject("VBUDTPrj.VBUDTObj")
udtData = objTest.TestMethod()
Response.Write( "Name = " & udtData.strName & "<BR>" )
Response.Write( "Dept = " & udtData.strDept & "<BR>" )
%>
- Run the ASP page. The the following error occurs:
Microsoft VBScript runtime error '800a01a8'
Object required
See the
TYPE statement in the Visual Basic Documentation.
APPLIES TO
- Microsoft Active Server Pages 4.0
- Microsoft Visual Basic 5.0 Learning Edition
- Microsoft Visual Basic 6.0 Learning Edition
- Microsoft Visual Basic 5.0 Professional Edition
- Microsoft Visual Basic 6.0 Professional Edition
- Microsoft Visual Basic 5.0 Enterprise Edition
- Microsoft Visual Basic Enterprise Edition for Windows 6.0
- Microsoft Internet Information Server 4.0
- Microsoft Internet Information Services 5.0
| kbcodesnippet kberrmsg kbprb KB224422 |
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