[android help] Monodroid ListView update problems

Monodroid ListView update problems

I'm not sure how much this will help anyone, but it seems to work fine in my instance.

I have a ViewModel class that keeps all the data I update within the App and trigger a "Collection Updated" action when a collection changes.

// All within ViewModel.cs

private Action SearchResultsUpdated;

private List m_oSearchResults;

Public List SearchResults
{
    get
    {
        if (m_oSearchResults == null)
            m_oSearchResults = new List ();
        return m_oSearchResults;
    }
    set
    {
        if (value != m_oSearchResults)
        {
            m_oSearchResults = value;
            //
            // Fire update event
            if (SearchResultsUpdated != null)
                SearchResultsUpdated ();
        }
    }
}

I then add a handler for this event within the adapter class.

// All within SearchResultsAdapter.cs

public class SearchResultsAdapter : BaseAdapter
{
.
.
    // Constructor
    public SearchResultsAdapter (Activity oContext)
        : base ()
    {
        // Add handler for list refresh
        ViewModel.SearchResultsUpdated += NotifyDataSetChanged;
        //
        m_oContext = oContext;
    }
}

Within the adapter I use the collection ViewModel.SearchResults as the data context for the list view. Hope that helps and is thorough enough for everyone to understand.

.

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