Facing problem of XMLDOMDocument2 in Tridion 2011

Question

I am migrating Tridion version 2009 to 2011. My existing event code of the EventSystem in Tridion 2009 for event named OnPagePublishPost is like below.

public void OnPagePublishPost(Tridion.ContentManager.Interop.TDS.Page page, IXMLDOMDocument2 publishResult, EventPhases phase) 
{
    XmlDocument doc = new XmlDocument();
    doc.LoadXml(publishResult.xml);

    XmlNamespaceManager ns = new XmlNamespaceManager(doc.NameTable);
    ns.AddNamespace("tcm", "http://www.tridion.com/ContentManager/5.0");
    ns.AddNamespace("xlink", "http://www.w3.org/1999/xlink");
    string publishOrUnpublish;
    publishOrUnpublish = doc.DocumentElement.SelectSingleNode("/tcm:PublishResponse/tcm:PublisherRequest/tcm:Instruction/@Title", ns).Value;
    EventHelper.WriteEventToHTMLLog("publishOrUnpublish: " + publishOrUnpublish);
    String pubTargUri = doc.DocumentElement.SelectSingleNode("/tcm:PublishResponse/tcm:PublisherRequest/tcm:PublicationTarget/@xlink:href", ns).Value;
    EventHelper.WriteEventToHTMLLog("pubTargUri: " + pubTargUri);

    string schemaID = Convert.ToString(page.ComponentPresentations[1].Component.Schema.ID;
}

Now when I subscribe this event using below code, shows me the error.

EventSystem.Subscribe<Tridion.ContentManager.CommunicationManagement.Page,
                      PublishEventArgs>(OnPagePublishPost, EventPhases.Processed);

Error Message

The best overloaded method match for 'Tridion.ContentManager.Extensibility.EventSystem.Subscribe<Tridion.ContentManager.CommunicationManagement.Page,Tridion.ContentManager.Extensibility.Events.PublishEventArgs>(Tridion.ContentManager.Extensibility.TcmEventHandler<Tridion.ContentManager.CommunicationManagement.Page,Tridion.ContentManager.Extensibility.Events.PublishEventArgs>, Tridion.ContentManager.Extensibility.EventPhases)' has some invalid arguments

I know something is going wrong with the parameter type IXMLDOMDocument2, but not getting how to solve this problem.

Answer 1

You are mixing 2 APIs here. As of Tridion 2011 SP1 there's a new event system based on TOM.NET, the previous event system was based on TOM.

You subscribe code:

EventSystem.Subscribe<Tridion.ContentManager.CommunicationManagement.Page, PublishEventArgs>(OnPagePublishPost, EventPhases.Processed);

is from new event system, however your handler:

public void OnPagePublishPost(Tridion.ContentManager.Interop.TDS.Page page, IXMLDOMDocument2 publishResult, EventPhases phase) { //Code to execute }

Is expecting TDS.Page which is from TOM. The two worlds are not going to work together.

I suggest you reading some blog posts on new event system, like http://www.curlette.com/?p=90

Answer 2

First thing, error is not occurred due to IXMLDOMDocument2. If this is the case then error message will be different.

However, you are doing two mistakes:

1. As @user978511 said you are mixing two API's
2. Subscribing and Calling function is not matching with the arguments

How to Subscribe to an EventSystem?

Below is the code,

EventSystem.Subscribe<Tridion.ContentManager.CommunicationManagement.Page, PublishEventArgs>(OnPagePublishPost, EventPhases.Processed);

How to Create a Calling Method?

Currently you are passing two arguments which is why, below error is occurred.

The best overloaded method match for 'Tridion.ContentManager.Extensibility.EventSystem.Subscribe(Tridion.ContentManager.Extensibility.TcmEventHandler, Tridion.ContentManager.Extensibility.EventPhases)' has some invalid arguments

You need to pass three arguments to the calling method that is Page, PublishEventArgs and EventPhases.

Below is the code,

public void OnPagePublishPost(Tridion.ContentManager.CommunicationManagement.Page page, PublishEventArgs publishEventArgs, EventPhases phase)
{
    IXMLDOMDocument2 result = null;

    // Do Your Stuff 

    ProcessOnPagePublishPost(page, result);
}

public void ProcessOnPagePublishPost(Tridion.ContentManager.CommunicationManagement.Page page, IXMLDOMDocument2 publishResult)
{
    // Execute your code further 
}

Hope this will help you.

Update:

As per request, below is updated code to access the schema Id of the first component presentation

public void ProcessOnPagePublishPost(Tridion.ContentManager.CommunicationManagement.Page page, IXMLDOMDocument2 publishResult)
{
    TcmUri schemaId = null;

    IList<ComponentPresentation> mComponentPresentations = page.ComponentPresentations;
    if (mComponentPresentations.Count > 0)
    {
        // Holds the first Component Presentation, Component's schema Id
        schemaId = mComponentPresentations[1].Component.Schema.Id;
    }

    XmlDocument doc = new XmlDocument();
    doc.LoadXml(publishResult.xml);

    // Execute your code further 
}

Update 2:

As per your further comments, my suggestion is not to use IXMLDOMDocument2. Access the publishEventArgs.Targets to read the information of Publishing Targets.

OnPagePublishPost will be called only, if the Page is Published.

EventSystem.Subscribe<Tridion.ContentManager.CommunicationManagement.Page, PublishEventArgs>(OnPagePublishPost, EventPhases.Processed);

// This method will be calling only if Page is Published.
public void OnPagePublishPost(Tridion.ContentManager.CommunicationManagement.Page page, PublishEventArgs publishEventArgs, EventPhases phase)
{
    TcmUri schemaId = null;

    IList<ComponentPresentation> mComponentPresentations = page.ComponentPresentations;
    if (mComponentPresentations.Count > 0)
    {
        // Holds the first Component Presentation, Component's schema Id
        schemaId = mComponentPresentations[1].Component.Schema.Id;
    }

    foreach (PublishingTarget publishingTarget in publishEventArgs.Targets)
    {
        String pubTargetTitle = publishingTarget.Title;
        TcmUri pubTargetId = publishingTarget.Id;

        // Do Your Stuff
    }
}

Hope this will help in understanding.