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From: Chris Hlade on 7 Apr 2010 09:01
I have an application that calls a routine within an AppDomain. The
AppDomain will raise an event outside the AppDomain called StatusUpdate. It
will possibly pass back a SystemException object.

In general, this works fine. However, if I call the AppDomain routine from
a form (versus a console app or a windows service), then the exception will
not properly pass back all pieces of a Soap Exception.

Specifically, I want the Detail attribute of the Soap Exception. I can see
that it has a value in the AppDomain but when this value is passed back via
the event call, the detail gets lost.

I attached the code for a small app that demonstrates the problem. Here is
the output of the application:

Inside AppDomain
Message: test
Detail: <A>1</A>
Outside AppDomain
Message: test
Detail: Nothing


I am not all that well-versed in AppDomains and would appreciate any ideas
that might help me get to the bottom of the problem.

Thanks,
Chris



Imports System.Web.Services.Protocols

Public Class Form1

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load

Dim exeAssembly As String =
System.Reflection.Assembly.GetExecutingAssembly().FullName

Dim ads As New AppDomainSetup()
ads.ApplicationBase = System.Environment.CurrentDirectory
ads.DisallowBindingRedirects = False
ads.DisallowCodeDownload = True
ads.ConfigurationFile =
AppDomain.CurrentDomain.SetupInformation.ConfigurationFile

Dim ad2 As AppDomain = AppDomain.CreateDomain("TestMapAppDomain",
Nothing, ads)

Dim mbrt As MarshalByRefType =
CType(ad2.CreateInstanceAndUnwrap(exeAssembly,
GetType(MarshalByRefType).FullName), MarshalByRefType)

AddHandler mbrt.StatusUpdate, AddressOf
ProcessQueueRecord_StatusUpdate

mbrt.RunTest()

End

End Sub

Private Sub ProcessQueueRecord_StatusUpdate(ByVal ex As Exception)

Console.WriteLine("Outside AppDomain")
Dim soapex As SoapException = CType(ex.GetBaseException,
SoapException)
Console.WriteLine(" Message: " & soapex.Message)
If soapex.Detail IsNot Nothing Then
Console.WriteLine(" Detail: " & soapex.Detail.OuterXml)
Else
Console.WriteLine(" Detail: Nothing")
End If

Console.WriteLine(ex.Message)

End Sub


Public Class MarshalByRefType
Inherits MarshalByRefObject

Public Event StatusUpdate(ByVal ex As Exception)

Sub RunTest()

Try
Dim xmldoc As New Xml.XmlDocument
xmldoc.LoadXml("<A>1</A>")
Throw New
System.Web.Services.Protocols.SoapException("test", New
System.Xml.XmlQualifiedName(), "", xmldoc.FirstChild)
Catch ex As Exception
Console.WriteLine("Inside AppDomain")
Dim soapex As SoapException = CType(ex.GetBaseException,
SoapException)
Console.WriteLine(" Message: " & soapex.Message)
If soapex.Detail IsNot Nothing Then
Console.WriteLine(" Detail: " &
soapex.Detail.OuterXml)
Else
Console.WriteLine(" Detail: Nothing")
End If
RaiseEvent StatusUpdate(ex)
End Try

End Sub

End Class

End Class
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