Framework.Reflection.CreateObject throwing exception on DataProvider - Extend It! ( Programming in VS2003, ASP.Net 1.1 )

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2/28/2006 12:08 PM

	Glenn Goodrich
6 posts

Framework.Reflection.CreateObject throwing exception on DataProvider

Hi,

I am going crazy here, so any help is appreciated. I have a custom module that throws an exception on this line:

private static void CreateProvider()
        {
            objProvider = ((DataProvider)DotNetNuke.Framework.Reflection.CreateObject("data", "Enspiria.DNN.Modules.RupModule.Data", "Enspiria.DNN.Modules.RupModule"));
        }

The exception is:

DotNetNuke.Services.Exceptions.ModuleLoadException: The type initializer for "Enspiria.DNN.Modules.RupModule.Data.DataProvider" threw an exception. ---> System.TypeInitializationException: The type initializer for "Enspiria.DNN.Modules.RupModule.Data.DataProvider" threw an exception. ---> System.ArgumentNullException: Value cannot be null. Parameter name: type at System.Activator.CreateInstance(Type type, Boolean nonPublic) at System.Activator.CreateInstance(Type type) at DotNetNuke.Framework.Reflection.CreateObject(String TypeName, String CacheKey) at DotNetNuke.Framework.Reflection.CreateObject(String ObjectProviderType, String ObjectProviderName, String ObjectNamespace, String ObjectAssemblyName) at DotNetNuke.Framework.Reflection.CreateObject(String ObjectProviderType, String ObjectNamespace, String ObjectAssemblyName) at Enspiria.DNN.Modules.RupModule.Data.DataProvider.CreateProvider() in C:\dotnetnuke\DesktopModules\RupModule\Components\DataProvider.cs:line 27 at Enspiria.DNN.Modules.RupModule.Data.DataProvider..cctor() in C:\dotnetnuke\DesktopModules\RupModule\Components\DataProvider.cs:line 21 --- End of inner exception stack trace --- at Enspiria.DNN.Modules.RupModule.Data.DataProvider.Instance() at Enspiria.DNN.Modules.RupModule.Business.RupModuleController.GetByModules(Int32 ModuleId) in c:\dotnetnuke\desktopmodules\rupmodule\components\rupmodulecontroller.cs:line 25 at Enspiria.DNN.Modules.RupModule.RupModule.Page_Load(Object sender, EventArgs e) in c:\dotnetnuke\desktopmodules\rupmodule\rupmodule.ascx.cs:line 51 --- End of inner exception stack trace ---

I have tried just about everything I can think of. This is my first custom module, so I am literally following the Wrox book step by step, but it doesn't work. PLEASE HELP!

Thanks,
Ruprict

2/28/2006 1:54 PM

	Glenn Goodrich
6 posts

Re: Framework.Reflection.CreateObject throwing exception on DataProvider

More info.....

The exception actually occurs in DotNetNuke.Framework.Reflection in this method:

Public Shared Function CreateObject(ByVal TypeName As String, ByVal CacheKey As String) As Object
on this line:
objType = Type.GetType(TypeName, True)

TypeName seems valid to me: "Enspiria.DNN.Modules.RupModule.SqlDataProvider, Enspiria.DNN.Modules.RupModule.SqlDataProvider" which is a class.

Finally, the actual exception is (and it's a weird one):

"System.TypeLoadException: ?
at System.Type.GetType(String typeName, Boolean throwOnError)
at DotNetNuke.Framework.Reflection.CreateObject(String TypeName, String CacheKey) in C:\dotnetnuke\components\Shared\Reflection.vb:line 90"

So, there is something wrong with the type name it's deriving, is my guess, but I can't seem to figure out what it is.

2/28/2006 2:11 PM

	Glenn Goodrich
6 posts

Re: Framework.Reflection.CreateObject throwing exception on DataProvider

Solved....

My SqlDataProvider class was in a SqlDataProvider namespace, so the type needed to be SqlDataProvider.SqlDataProvider or I needed to remove that part of the namespace, which is what I did.

Real problem: I am not smart.

Sorry to kill forum space.

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