How to Select feature and highlight in ArcGIS using C#

Question

Hi I have the following code below for zooming into an arcGIS object based on the attribute now all I need is to be able to highlight that area with a select feature (The feature where you right-click on the area on the map and do select feature).

Currently I have an event which will do the zoom.I want to add this select to the same attribute as well.

Thank you in advance!!!

ESRI.ArcGIS.Carto.ILayer layer = GetLayersClass.GetFieldBoundaryLayer;
if (layer is ESRI.ArcGIS.Carto.IGroupLayer)
{
    ESRI.ArcGIS.Carto.IGroupLayer groupLayer = layer as ESRI.ArcGIS.Carto.IGroupLayer;
    ICompositeLayer pCompositeLayer = layer as ICompositeLayer;
    int layers = pCompositeLayer.Count;
    ILayer pLayer = pCompositeLayer.Layer[0];

    IFeatureLayer pFeatureLayer = (IFeatureLayer)pLayer;

    IFeatureClass pFeatureClass = pFeatureLayer.FeatureClass;
    IQueryFilter pFilter = new QueryFilterClass();
    pFilter.WhereClause = "RightID = '" + selectedRightID.ToString() + "'";

    IFeatureCursor pFeatureCursor = pFeatureClass.Search(pFilter, false);
    IFeature pFeature = pFeatureCursor.NextFeature();

    if (pFeature == null)
    {
        System.Windows.Forms.MessageBox.Show("This section doesn't exist");
        return;
    }

    IApplication m_application = ArcMap.Application;
    IMxDocument pMxDoc = (IMxDocument)m_application.Document;
    IActiveView pActiveView = (IActiveView)pMxDoc.FocusMap;

    IEnvelope pEnv = pFeature.Shape.Envelope;
    pEnv.Expand(1.1, 1.1, true);

    pActiveView.Extent = pEnv;

    pActiveView.Refresh();

I tried by adding this code which I think will add the particular feature to the selection. but no luck with that as well.

IFeatureSelection pfeatSelect = pFeatureLayer as IFeatureSelection;
pfeatSelect.Add(pFeature);

Answer 1

If I understand you correctly, all you need is this:

IFeatureSelection featSelect = pFeatureLayer as IFeatureSelection;
featSelect.SelectFeatures(pFilter, esriSelectionResultEnum.esriSelectionResultNew, false);

This will select all Features that match your filter.