How does one successfully connect to the TFS 2010 workitem store?

Question

I've tried two ways of connecting to the workitemstore for the TFS server we're running. Attempt A was to connect to the configuration server and use GetService<WorkItemStore>() method. This always returns null.

Attempt B was to connect to the TfsTeamProjectCollection and use the GetService<WorkItemStore>() method or pass the project collection into the WorkItemStore constructor. On attempt B, I get an exception stating "Error HRESULT E_FAIL has been returned from a call to a COM component." The only info I can find on that seems to indicate some permissions problem, but I've confirmed I'm authenticated as a user with read access to the whole project collection and I connect and meddle appropriately via VS 2011 dev preview.

Here's how I'm connecting...

    public TfsConfigurationServer GetConfigurationServer()
    {
        Uri tfsUri = new Uri(configs.TfsUri);
        TfsConfigurationServer server = TfsConfigurationServerFactory.GetConfigurationServer(tfsUri, credProvider);
        server.Authenticate();
        if (server.HasAuthenticated == false)
            throw new InvalidOperationException("You can't authenticate against the tfs instance.");
        return server;
    }

    public TfsTeamProjectCollection GetProjectCollectionInstance(string projectCollectionName)
    {
        Uri tfsUri = new Uri(configs.TfsUri + "/" + projectCollectionName);         
        TfsTeamProjectCollection collection = TfsTeamProjectCollectionFactory.GetTeamProjectCollection(tfsUri, credProvider);
        collection.Authenticate();
        if (collection.HasAuthenticated == false)
            throw new InvalidOperationException("You can't authenticate against the tfs instance.");
        return collection;
    }

and here's how I'm trying to get the WorkItemStore (silly code to illustrate the problem)...

    public WorkItemProvider()
    {
        if (workItems == null)
            workItems = ServerProvider.ServerInstance.GetService<WorkItemStore>();
        if (workItems == null)
            workItems = ServerProvider.ProjectCollectionInstance.GetService<WorkItemStore>();
        if (workItems == null)
            workItems = new WorkItemStore(ServerProvider.ProjectCollectionInstance);
        if (workItems == null)
            throw new NullReferenceException("Couldn't load work item store.");
    }

I'm not on the same domain as the server, but I'm authenticating as a domain user with an ICredentialsProvider and I've confirmed I'm authenticated as that user. Any pointers would be helpful.

Answer 1

Check if this does what you need:

using System;
using Microsoft.TeamFoundation.Client;
using Microsoft.TeamFoundation.WorkItemTracking.Client;

namespace GetsWorkItem
{
    class Program
    {
        static void Main()
        {
            TfsTeamProjectCollection teamProjectCollection = TfsTeamProjectCollectionFactory.GetTeamProjectCollection(new Uri("http://<TFS>:8080/tfs/<COLLECTION>"));
            WorkItemStore workItemStore= (WorkItemStore) teamProjectCollection.GetService(typeof (WorkItemStore));

            WorkItem workItem = workItemStore.GetWorkItem(1234);
        }
    }
}