ID: Q174576
The information in this article applies to:
Active Server Pages developers programming in VBScript (VBS) often encounter "Type Mismatch" errors when attempting to return arrays form server-side objects to server-side script code. This article explains how to do this in VBS version 2.0.
VBS is not as flexible as Visual Basic when it comes to passing variables of different types to or from objects. This is because VBS stores all variables as VARIANTS. Thus, it must convert these VARIANTS to other types when calling methods on objects.
A common scenario is to call a method on a server-side object that returns an array of strings, or some other type, to ASP. Depending on how the server-side object is coded, this may cause a "Type Mismatch" error in the script. The key to making this work, is declaring the object method to return a VARIANT. Inside the method, store the array of data in a VARIANT and return this variable to the server-side script.
The code segments below show a method on a Visual Basic 5.0 object, and the ASP script that calls this method.
Visual Basic 5.0 Object Method:
Public Function GetArray() As Variant
Dim MyVar(5) As Variant
MyVar(0) = "String 0"
MyVar(1) = "String 1"
MyVar(2) = "String 2"
MyVar(3) = "String 3"
MyVar(4) = "String 4"
GetArray = MyVar
End Function
<HTML>
<BODY>
<%
Set Array_Obj = Server.CreateObject("Project1.Class1")
myarray = Array_Obj.GetArray()
Response.Write myarray(0) & "<P>"
Response.Write myarray(1) & "<P>"
Response.Write myarray(2) & "<P>"
Response.Write myarray(3) & "<P>"
Response.Write myarray(4) & "<P>"
%>
</BODY>
</HTML>
Keywords :
Version : WINDOWS:2.0; WINNT:1.0,1.0b
Platform : WINDOWS winnt
Issue type : kbhowtoLast Reviewed: October 5, 1997