Vista - Trouble using MSScript control with Arrays.

I'm hosting the MSScript control in a bit of c#, then using AddObject
to provide the script with a refenece to a .net object which happens
to have an array field.

I'm having trouble manipulating this array property, in particular
accessing the array elements.

Below is a sample bit of c#, where the script control is instantiated,
then passed a "person" object which looks like so:
public class Person
{
public string Name = "Fred";
public object[] Possessions = new object [] { "Books",
"Pens" };
}

This object and it's properties is usable from the script, except that
I dont seem to be able to access the array property elements.

Specifically, on executing the following vbscript expressions, they
all work except the last one:

Person.Name & " exists "
"Type of host array is " & TypeName(Person.Possessions)
"UBound of host array is " & cstr(UBound(Person.Possessions))
"Element of host array is " & cstr(Person.Possessions(1))

This last statement accessing an array element fails with:
"Wrong number of arguments or invalid property assignment:
'Person.Possessions'"

Any idea why? Or whether there are any known problems accessing
arrays contained within a host from withing a hosted script control?

(If there's a better place to ask such questions then please advise.)

thanks
Michael

---------------




Here's the code I was using:

using System;
public class TestScriptControl
{
public class Person
{
public string Name = "Fred";
public object[] Possessions = new object [] { "Books",
"Pens" };
}

static public void Main()
{
MSScriptControl.IScriptControl scriptControl = new
MSScriptControl.ScriptControlClass();
scriptControl.Language = "VBScript";

Person p = new Person();
scriptControl.AddObject("Person", p, false);

Console.WriteLine(scriptControl.Eval("Person.Name & \" exists
\""));
Console.WriteLine(scriptControl.Eval("\"Type of host array is
\" & TypeName(Person.Possessions) "));
Console.WriteLine(scriptControl.Eval("\"UBound of host array
is \" & cstr(UBound(Person.Possessions)) "));
Console.WriteLine(scriptControl.Eval("\"Element of host array
is \" & cstr(Person.Possessions(1)) "));
}
}

When run this produces:
Fred exists
Type of host array is Variant()
UBound of host array is 1

Unhandled Exception: System.ArgumentException: Wrong number of
arguments or invalid property assignment: 'Person.Possessions'
at MSScriptControl.ScriptControlClass.Eval(String Expression)
at TestScriptControl.Main()

"MichaelL" <google@xxxxxx> wrote in message
news:b290ed75-8386-48fc-aaa9-c13aedf0986c@xxxxxxJust a guess out of the blue, but I wonder if Person.Possessions(1).Value or
Person.Possessions(1).Name would work. The items in the array/collection
might be objects.

--
Richard Mueller
MVP Directory Services
Hilltop Lab - http://www.rlmueller.net
--