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HomeHomeArchived Discus...Archived Discus...Developing Under Previous Versions of .NETDeveloping Under Previous Versions of .NETASP.Net 2.0ASP.Net 2.0Type Initialization Exception (not caused by upgrade)?Type Initialization Exception (not caused by upgrade)?
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9/24/2007 2:47 PM
 
Geoffrey Morton-Haworth

www.yalaworld.net
Joined: 4/19/2006
Posts: 296

Type Initialization Exception

 

Hi All

I am testing a module in 4.5.5 called "Interface". It works fine and I am trying to package it.

I have compiled the .vb files (using the command line compiler) and added the .dlls to the .dnn install file.

Everything seemed OK (files in the right place when I upload) but I now get this message...

Error: Interface is currently unavailable.

DotNetNuke.Services.Exceptions.ModuleLoadException: The type initializer for 'MheLtd.Modules.Interface.DataProvider' threw an exception. ---> System.TypeInitializationException: The type initializer for 'MheLtd.Modules.Interface.DataProvider' threw an exception. ---> System.ArgumentNullException: Value cannot be null. Parameter name: type at System.Activator.CreateInstance(Type type, Boolean nonPublic) at DotNetNuke.Framework.Reflection.CreateObject(String ObjectProviderType, String ObjectProviderName, String ObjectNamespace, String ObjectAssemblyName, Boolean UseCache) at DotNetNuke.Framework.Reflection.CreateObject(String ObjectProviderType, String ObjectNamespace, String ObjectAssemblyName) at MheLtd.Modules.Interface.DataProvider.CreateProvider() at MheLtd.Modules.Interface.DataProvider..cctor() --- End of inner exception stack trace --- at MheLtd.Modules.Interface.DataProvider.Instance() at MheLtd.Modules.Interface.InterfaceController.GetInterfaces(Int32 PortalId) at MheLtd.Modules.Interface.ListInterface.Page_Load(Object sender, EventArgs e) --- End

of inner exception stack trace ---

I have seen Michael Washington’s advice that this might be caused by upgrading a module from DNN3 to DNN4 and to change

CType(Framework.Reflection.CreateObject("data", "MyModule", "MyModule.dll"), DataProvider)

To:

CType(Framework.Reflection.CreateObject("data", "MyModule", ""), DataProvider)

But my code already says

' dynamically create provider

Private Shared Sub CreateProvider()

objProvider = CType(Framework.Reflection.CreateObject("data", "MheLtd.Modules.Interface", ""), DataProvider)

End Sub

 

So does anyone have any thoughts on what to do next?

Kind regards

Geoffrey

 

Geoffrey Morton-Haworth www.yalaworld.net
 
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1/5/2008 9:57 AM
 
Geoffrey Morton-Haworth

www.yalaworld.net
Joined: 4/19/2006
Posts: 296

Feedback from me, since no one replied to this question.

For anyone encountering this, or similar problems,  the command line compiler is good enough for very simple modules - but why bother to compile  when your  compiled code can be so easily disassembled? The problems came when I had embedded UserControls in aspx pages.

So I shelled out for Visual Studio and followed Vladan Strigo's approach here.

This did the trick.

Good luck

Geoffrey

 

Geoffrey Morton-Haworth www.yalaworld.net
 
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