Hi -

We have multiple data providers that we've been using for several years on our DNN site. We recently upgraded the site from 4.9.5 to 5.1.2 and the site does not load now. In the web.config file we define our providers like so:

<connectionStrings>

and defined in the default providers:

data defaultProvider="SqlDataProvider">

We receive the following error:

Server Error in '/DNN' Application.

---

Could not load provider Bold.Providers.OasisDataProvider, Bold.Providers

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Configuration.ConfigurationErrorsException: Could not load provider Bold.Providers.OasisDataProvider, Bold.Providers

Source Error:

Line 67:             Dim type As Type = System.Web.Compilation.BuildManager.GetType(provider.Type, False, True)
Line 68:             If type Is Nothing Then
Line 69:                 Throw New ConfigurationErrorsException(String.format("Could not load provider {0}", provider.Type))
Line 70:             End If
Line 71: 

[ConfigurationErrorsException: Could not load provider Bold.Providers.OasisDataProvider, Bold.Providers]
   DotNetNuke.ComponentModel.ProviderInstaller.InstallProvider(IContainer container, Provider provider) in C:\Dev-TechVSS\DotNetNuke\Library\ComponentModel\ProviderInstaller.vb:69
   DotNetNuke.ComponentModel.ProviderInstaller.InstallComponents(IContainer container) in C:\Dev-TechVSS\DotNetNuke\Library\ComponentModel\ProviderInstaller.vb:59
   DotNetNuke.ComponentModel.ComponentFactory.InstallComponents(IComponentInstaller[] installers) in C:\Dev-TechVSS\DotNetNuke\Library\ComponentModel\ComponentFactory.vb:42
   DotNetNuke.Common.Global.Application_Start(Object Sender, EventArgs E) in C:\Dev-TechVSS\DotNetNuke\Website\App_Code\Global.asax.vb:72

Version Information: Microsoft .NET Framework Version:2.0.50727.3082; ASP.NET Version:2.0.50727.3082

 Any ideas why this is occuring? Thanks!

As Sebastian indicated, all the providers defined in your web.config will need to exist within the application or the application will fail hard (because it tries to instantiate all of them).  I do not *believe* that this behavior has changed since 4.9, but I am only semi-confident about this (if I were wrong here it would explain your issue).

That said, why do you have a provider defined that does not exist? Where IS that class defined, anyway?

Brandon