KB195180 - PRB: VBScript "Type Mismatch" Error When Field Type Is adNumeric

Article ID: 195180

Article Last Modified on 12/3/2003

Microsoft Open Database Connectivity 2.5
Microsoft ActiveX Data Objects 1.0
Microsoft ActiveX Data Objects 1.5
Microsoft ActiveX Data Objects 2.0
Microsoft ActiveX Data Objects 2.5
Microsoft ActiveX Data Objects 2.6
Microsoft ActiveX Data Objects 2.7
Microsoft Data Access Components 1.5
Microsoft Data Access Components 2.0
Microsoft Data Access Components 2.5
Microsoft Data Access Components 2.6
Microsoft Data Access Components 2.7
Microsoft Active Server Pages 4.0
Microsoft Open Database Connectivity Driver for Visual FoxPro 5.0

This article was previously published under Q195180

SYMPTOMS

When you perform a numeric comparison or calculation on an adNumeric (131) field type using VBScript, the following errors may be returned:

Microsoft VBScript runtime error '800a000d'
Type mismatch

Microsoft VBScript runtime error '800a01ca' Variable uses an Automation type not supported in VBScript

CAUSE

The errors occur because VBScript cannot properly convert adNumeric values to a valid numeric type.

RESOLUTION

You can use either of the following two possible workarounds:

Convert the adNumeric field using CDbl() (or CInt()) as in the following example:

   <%@ LANGUAGE="VBScript"%>
   <%
   Set oConn = Server.CreateObject("ADODB.Connection")
   oConn.Open "MyDSN", "MyUserID", "MyPassWord"
   set oRS = oConn.Execute("Select list_price FROM DEMO.PRICE")
   Response.Write("List Price * 100 = " & CDbl(oRS("list_price")) * 100)
   %>

-or-

Use JScript, because JScript does not exhibit this behavior.

MORE INFORMATION

Steps to Reproduce the Behavior

The following code exhibits the above-mentioned error:

<%
    Set oConn = Server.CreateObject("ADODB.COnnection")
    oConn.Open "MyDSN", "MyUserID", "MyPassWord"
    set oRS = oConn.Execute("Select list_price FROM DEMO.PRICE")

    'This is the bad line of code, "list_price" is being returned as
    'type adNumeric.
    Response.Write("List Price * 100 = " & oRS("list_price") * 100)
    %>

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