[Mono-bugs] [Bug 645553] New: Empty ArrayList returned from WCF fails to deserialize, fixed in Mono need fix applied to MonoTouch

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https://bugzilla.novell.com/show_bug.cgi?id=645553

https://bugzilla.novell.com/show_bug.cgi?id=645553#c0


           Summary: Empty ArrayList returned from WCF fails to
                    deserialize, fixed in Mono need fix applied to
                    MonoTouch
    Classification: Mono
           Product: MonoTouch
           Version: unspecified
          Platform: x86
        OS/Version: Other
            Status: NEW
          Severity: Major
          Priority: P5 - None
         Component: Class Libraries
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: dsandor at mdsiinc.com
         QAContact: mono-bugs at lists.ximian.com
          Found By: Customer
           Blocker: ---


Description of Problem:

Atsushi Eno fixed this error in the Mono svc.  The bug still exists in
MonoTouch SDK version 3.2.

http://go-mono.com/forums/#nabble-td1576794

---Summary from forum---
I am using a basicHttpBinding to communicate with an IIS 7 hosted WCF service
from a WinForms ported application (running on Mono 2.6.1). 

If the WCF Service returns an empty array or an object containing an empty
array the call results in the following exception: 

Exception in async operation: System.InvalidOperationException: Failed to set
va 
lue of type System.Collections.ArrayList for property
MonoTest.SearchService.DAS 
earchField[] Fields ---> System.ArgumentException: failed to convert parameters 
  at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags
invoke 
Attr, System.Reflection.Binder binder, System.Object[] parameters,
System.Global 
ization.CultureInfo culture) [0x00000] in <filename unknown>:0 
.. 

The error goes away if I return null instead of the empty array. 

Patch to mono was applied here:
http://lists.ximian.com/pipermail/mono-patches/2010-March/167770.html


Steps to reproduce the problem:
1. Return an EMPTY ArrayList from WCF.
2. Consume WCF in MonoTouch by exporting WSDL to Proxy using SL3 SDK.


Actual Results:
xception in async operation: System.InvalidOperationException: Failed to set va 
lue of type System.Collections.ArrayList for property
MonoTest.SearchService.DAS 
earchField[] Fields ---> System.ArgumentException: failed to convert parameters 
  at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags
invoke 
Attr, System.Reflection.Binder binder, System.Object[] parameters,
System.Global 
ization.CultureInfo culture) [0x00000] in <filename unknown>:0 

Expected Results:
Array that is empty should have been initialized.

How often does this happen? 
Always

Additional Information:

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