How to - Custom WebPart acting as a consumer to SharePoint List Filter WebPart

Question

I am trying to create a custom webpart which will act as a consumer webpart to the SharePoint List Filter WebPart. I have not been able to make this code work, the send filter values to option is disabled on the List filter web part. any ideas?

namespace PageViewerWithConnections.CustomPageViewer
{
    [ToolboxItemAttribute(false)]
    public class CustomPageViewer : System.Web.UI.WebControls.WebParts.WebPart
    {
        IFilterValues _filterVals;

        [ConnectionConsumer("Market")]
        public void ConsumeFilter(IFilterValues filterValues)
        {
            _filterVals = filterValues;
        }

        protected override void CreateChildControls()
        {

        }
    }
}

Answer 1

You've not added any parameters that you support to filterValues. See the example in Walkthrough: Writing a Simple Filter Consumer Web Part Sample specifically step 1 and SetConnectionInterface