using System;
using System.Configuration;
using System.Collections.ObjectModel;
using ThinkGeo.MapSuite.Core;
using ThinkGeo.MapSuite.WebEdition;
namespace GetFeatureClickedOnWeb
{
    public partial class TestForm : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!Page.IsPostBack)
            {
                Map1.MapBackground.BackgroundBrush = new GeoSolidBrush(GeoColor.FromHtml("#E5E3DF"));
                Map1.CurrentExtent = new RectangleShape(-97.7583, 30.2714, -97.7444, 30.2632);
                Map1.MapUnit = GeographyUnit.DecimalDegree;
                Map1.MapTools.MouseCoordinate.Enabled = true;
                LayerOverlay streetOverlay = new LayerOverlay("StreetOverlay", false, TileType.SingleTile);
                streetOverlay.IsBaseOverlay = false;
                string shapePath = MapPath("App_Data
Streets.shp");
                ShapeFileFeatureLayer streetLayer = new ShapeFileFeatureLayer(shapePath);
                streetLayer.ZoomLevelSet.ZoomLevel01.DefaultLineStyle = LineStyles.LocalRoad1;
                streetLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;
                streetOverlay.Layers.Add("StreetLayer", streetLayer);
                Map1.CustomOverlays.Add(streetOverlay);
                //InMemoryFeature to show the selected feature (the feature clicked on).
                InMemoryFeatureLayer selectLayer = new InMemoryFeatureLayer();
                selectLayer.Open();
                selectLayer.Columns.Add(new FeatureSourceColumn("FENAME"));
                selectLayer.Close();
                selectLayer.ZoomLevelSet.ZoomLevel01.DefaultLineStyle = LineStyles.CreateSimpleLineStyle(GeoColor.FromArgb(150, GeoColor.StandardColors.Red), 10, true);
                selectLayer.ZoomLevelSet.ZoomLevel01.DefaultTextStyle = TextStyles.LocalRoad1("FENAME");
                selectLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;
                LayerOverlay selectOverlay = new LayerOverlay();
                selectOverlay.Layers.Add("SelectLayer", selectLayer);
                selectOverlay.IsBaseOverlay = false;
                Map1.CustomOverlays.Add(selectOverlay);
             }
        }
        protected void Map1_Click(object sender, MapClickedEventArgs e)
        {
            //Here we use a buffer of 15 in screen coordinate. This means that regardless of the zoom level, we will always find the nearest feature
            //within 15 pixels to where we clicked.
            int screenBuffer = 15;
            //Here we have to use the ToScreencoordinate function because the MapClickedEventArgs does not provide the mouse screen position, only the
            //mouse world position.
            ScreenPointF clickedPointF = ExtentHelper.ToScreenCoordinate(Map1.CurrentExtent, e.Position, (float)Map1.Width.Value, (float)Map1.Height.Value);
            ScreenPointF bufferPointF = new ScreenPointF(clickedPointF.X + screenBuffer, clickedPointF.Y);
            //Logic for converting screen coordinate values to world coordinate for the spatial query. Notice that the distance buffer for the spatial query
            //will change according to the zoom level while it remains the same for the screen buffer distance.
            double distanceBuffer = ExtentHelper.GetWorldDistanceBetweenTwoScreenPoints(Map1.CurrentExtent, clickedPointF, bufferPointF,
                                                                (float)Map1.Width.Value, (float)Map1.Height.Value, Map1.MapUnit, DistanceUnit.Meter);
 
            LayerOverlay streetOverlay = (LayerOverlay)Map1.CustomOverlays[0];
            ShapeFileFeatureLayer streetLayer = (ShapeFileFeatureLayer)streetOverlay.Layers["StreetLayer"];
            Collection<string> columnNames = new Collection<string>();
            columnNames.Add("FENAME");
            streetLayer.Open();
            Collection<Feature> features = streetLayer.FeatureSource.GetFeaturesNearestTo(new PointShape(e.Position.X, e.Position.Y),
                                           Map1.MapUnit, 1, columnNames, distanceBuffer, DistanceUnit.Meter);
            streetLayer.Close();
            //Adds the feature clicked on to the selected layer to be displayed as highlighed and with the name labeled.
            LayerOverlay selectOverlay = (LayerOverlay)Map1.CustomOverlays[1];
            InMemoryFeatureLayer selectLayer = (InMemoryFeatureLayer)selectOverlay.Layers["SelectLayer"];
            selectLayer.InternalFeatures.Clear();
            if (features.Count > 0)
            {
                selectLayer.InternalFeatures.Add(features[0]);
            }
            selectOverlay.Redraw();
        }
    }
}

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="TestForm.aspx.cs" Inherits="GetFeatureClickedOnWeb.TestForm" %>
<%@ Register Assembly="WebEdition" Namespace="ThinkGeo.MapSuite.WebEdition" TagPrefix="cc1" %>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <link href="~/theme/default/samplepic/style.css" rel="stylesheet" type="text/css" />
    <title>Get Feature Clicked On</title>
</head>
<body>
    <form id="form1" runat="server">
    <asp:ScriptManager ID="ScriptManager1" runat="server">
    </asp:ScriptManager>
    <cc1:Map ID="Map1" runat="server" Height="100%" Width="100%"
        onclick="Map1_Click">
    </cc1:Map>
   <%-- <description:descriptionpanel ID="DescPanel" runat="server">
        This sample shows how to get the feature clicked on.
        <br />
        <br />
        <asp:Button CssClass="btn" ID="btnRoad" runat="server" Text="Normal" OnClientClick="Map1.SetCurrentBackgroundMapType(G_NORMAL_MAP); return false;" />
        <asp:Button CssClass="btn" ID="btnAerial" runat="server" Text="Hybrid" OnClientClick="Map1.SetCurrentBackgroundMapType(G_HYBRID_MAP); return false;" /><br />
        <asp:Button CssClass="btn" ID="btnSatellite" runat="server" Text="Satellite" OnClientClick="Map1.SetCurrentBackgroundMapType(G_SATELLITE_MAP); return false;" />
        <asp:Button CssClass="btn" ID="btnPhysical" runat="server" Text="Physical" OnClientClick="Map1.SetCurrentBackgroundMapType(G_PHYSICAL_MAP); return false;" />
    </description:descriptionpanel>--%>
    </form>
</body>
</html>