handling events raised in custom providers

[Datacop]

I am making use of the Provider model to create custom logic providers for an
in house winform application.

I have my own provider consumer that is responsible for loading the proper
provider and delegating the methods back to the provider. The provider
consumer also handles events raised from the provider.

The problem that I'm having is the events are not being established properly
within the providers to the provider consumer..

The event in question is a simple "message" back to the provider consumer,
which the provider consumer then bubbles back to it's calling object using
the same event handler that it uses to bubble up it's own messages.

Attached sample code...

In my ProviderConsume r class:

public event MessageHandlerD elegate ErrorMessage;

private void ErrorMessageHan dler(string msg)
{
if (this.ErrorMess age != null)
{
ErrorMessage(ms g);
}
else
{
throw new Exception(msg);
}
}

private void LoadProviders()
{
if (dataProvider == null)
{
lock (thisLock)
{
if (dataProvider == null)
{
try
{
DataSynchProvid erConfiguration section =
(DataSynchProvi derConfiguratio n)System.Config uration.Configu rationManager.G etSection("Data Providers");
dataProviders = new DataProviderBas eCollection();

System.Web.Conf iguration.Provi dersHelper.Inst antiateProvider s(section.Provi ders, dataProviders, typeof(DataSync h.ProviderBases .DataProviderBa se));
dataProvider =
dataProviders[this.loadingPro vider];
if (dataProvider == null)
{
//throw new
System.Configur ation.Provider. ProviderExcepti on("Unable to load the specified
provider");
ErrorMessageHan dler("Unable to load
specified provider: " + this.loadingPro vider);
}
else
{
dataProvider.Er rorMessage += new
MessageHandlerD elegate(this.Er rorMessageHandl er);
dataProvider.Re portMessage += new
MessageHandlerD elegate(this.Re portMessageHand ler);

ReportMessageHa ndler("DataProv ider " +
this.loadingPro vider + " Loaded Successfully");
}
}
catch (Exception ex)
{
#if DEBUG
System.Windows. Forms.MessageBo x.Show("Message " +
Environment.New Line + "-------" + Environment.New Line + ex.Message +
Environment.New Line + Environment.New Line + "InnerException " +
Environment.New Line + "--------------" + Environment.New Line +
ex.InnerExcepti on, "DataSynch::Dat aProviderConsum er::LoadProvide rs()");
#else
throw new
System.Configur ation.Provider. ProviderExcepti on(ex.Message,
ex.InnerExcepti on);
#endif
}
}
}
}
}

As you can see, in the LoadProviders method, once the provider is loaded,
its events are added the consumers message handler..

In the Prover class:

public event MessageHandlerD elegate ErrorMessage;

private void ErrorMessageHan dler(string msg)
{
// raise message if possible, otherwise, eat it..
if (ErrorMessage != null)
{
ErrorMessage(ms g);
}
}

public override bool ConnectDB()
{
if (this.dbConn.St ate == ConnectionState .Open)
{
return true;
}
else
{
if (this.connectio nString.Length == 0)
{
ErrorMessageHan dler("Connectio n String can not be empty");
return false;
}
else
{
[ ... snip ... ]

Now, when the error event happens in the provider, it goes to the
errormessagehan dler and the errormessage event is null, even though it is set
in the LoadProviders() method in the consumer.

What, if anything am I doing wrong?