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comp.lang.ruby

Ruby win32ole properties

Andreas Warberg

6/26/2008 9:12:00 AM

Hi

I'm running simulations in Vissim using ruby and win32ole to connect to
a COM server.

I wish to set a parameter in the COM server using the following
description from the manual:

AttValue ([in] BSTR Attribute, [in] VARIANT Value)
Sets an evaluation attribute. Please get the language independent
attribute
tag from the table at the end of this section.
Parameters
[in] BSTR Attribute : Attribute name (see below)
[in] VARIANT Value : Attribute value. (type according to attribute)
Example
eval.AttValue(â??VEHICLERECORDâ??) = True

In Excel I have created the following sub to perform the task:

Sub test()
Dim vissim
Set vissim = CreateObject("VISSIM.Vissim")

vissim.LoadNet "mynet.inp"

Dim eval
Set eval = vissim.Evaluation
MsgBox "Before: " & eval.AttValue("NODE")
eval.AttValue("NODE") = 1
MsgBox "After: " & eval.AttValue("NODE")

vissim.Exit
End Sub

Which works fine.

In Ruby I am out of luck, however:

def test
vissim = WIN32OLE.new('VISSIM.Vissim')

vissim.LoadNet 'mynet.inp'

eval = vissim.Evaluation
puts "Before: #{eval.AttValue('NODE')}"
#eval.AttValue("NODE") = 1 # this doesn't work, obviously

eval.AttValue["NODE"] = 1 # error here number of parameters

puts "After: #{eval.AttValue('NODE')}"
end

Running test I get:

C:/greenwaves/code/test.rb:33:in `method_missing': AttValue
(WIN32OLERuntimeError)
OLE error code:0 in <Unknown>
<No Description>
HRESULT error code:0x8002000e
Invalid number of parameters.

I tried exchanging 'eval.AttValue["NODE"] = 1' with
eval.AttValue("NODE",1) which also complains about the number of
parameters.

Apparently I can only access the getter-method. Is there something else
I can try?

Kind regards
Andreas
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2 Answers

Siep Korteling

6/26/2008 9:47:00 AM

0

Andreas Warberg wrote:
> eval = vissim.Evaluation
Can't test your code, maybe the variable named 'eval' is confusing
things.

Regards,

Siep
--
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Andreas Warberg

6/26/2008 10:10:00 AM

0

Siep Korteling wrote:
> Can't test your code, maybe the variable named 'eval' is confusing
> things.

Nah that isn't it. I can't set global vissim parameters either:

irb(main):009:0> vissim = WIN32OLE.new('VISSIM.Vissim')
=> #<WIN32OLE:0x2c2a5cc>
irb(main):010:0> vissim.LoadNet 'mynet.inp'
=> nil
irb(main):011:0> vissim.AttValue('UNITDISTANCE1')
=> 0
irb(main):012:0> vissim.AttValue['UNITDISTANCE1'] = 0
WIN32OLERuntimeError: AttValue
OLE error code:0 in <Unknown>
<No Description>
HRESULT error code:0x8002000e
Invalid number of parameters.
from (irb):12:in `method_missing'
from (irb):12
irb(main):013:0> vissim.AttValue('UNITDISTANCE1',0)
WIN32OLERuntimeError: AttValue
OLE error code:0 in <Unknown>
<No Description>
HRESULT error code:0x8002000e
Invalid number of parameters.
from (irb):13:in `method_missing'
from (irb):13
irb(main):014:0>

No 'eval' involved.
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