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--- source_code_webeditionsample_getfeatureclickedon2_cs_100726.zip [2015/08/20 03:08]
127.0.0.1 external edit
+++ source_code_webeditionsample_getfeatureclickedon2_cs_100726.zip [2015/09/09 03:37] (current)
admin
@@ Line 1: / Line 1: @@
-====== Source_Code_WebEditionSample_GetFeatureClickedOn2_CS_100726.zip ======
-<noinclude>{{article rating}}</noinclude>
+====== Source Code WebEditionSample GetFeatureClickedOn2 CS 100726.zip ======
 ====TestForm.aspx.cs====
-^ Code ^
-| <source lang="csharp" line="1">using System;  \\ using System.Configuration;  \\ using System.Collections.ObjectModel;  \\ using ThinkGeo.MapSuite.Core;  \\ using ThinkGeo.MapSuite.WebEdition;  \\  \\ namespace GetFeatureClickedOnWeb2  \\ {  \\     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(-97.7567,30.2701,-97.7361,30.2592);  \\                 Map1.MapUnit = GeographyUnit.DecimalDegree;  \\  \\                 Map1.MapTools.MouseCoordinate.Enabled = true;  \\  \\                 LayerOverlay layerOverlay = new LayerOverlay("StreetOverlay", false, TileType.SingleTile);  \\                 layerOverlay.IsBaseOverlay = false;  \\  \\                 string polygonPath = MapPath("App_Data\\polygons.shp");  \\                 ShapeFileFeatureLayer polygonLayer = new ShapeFileFeatureLayer(polygonPath);  \\                 polygonLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle = AreaStyles.CreateSimpleAreaStyle(GeoColor.StandardColors.LightGreen);  \\                 polygonLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;  \\                 layerOverlay.Layers.Add("PolygonLayer", polygonLayer);  \\  \\                 string polygonPath2 = MapPath("App_Data\\polygons2.shp");  \\                 ShapeFileFeatureLayer polygonLayer2 = new ShapeFileFeatureLayer(polygonPath2);  \\                 polygonLayer2.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle = AreaStyles.CreateSimpleAreaStyle(GeoColor.StandardColors.LightSteelBlue);  \\                 polygonLayer2.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;  \\                 layerOverlay.Layers.Add("PolygonLayer2", polygonLayer2);  \\  \\                 string streetPath = MapPath("App_Data\\Streets.shp");  \\                 ShapeFileFeatureLayer streetLayer = new ShapeFileFeatureLayer(streetPath);  \\                 streetLayer.ZoomLevelSet.ZoomLevel01.DefaultLineStyle = LineStyles.LocalRoad1;  \\                 streetLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;  \\                 layerOverlay.Layers.Add("StreetLayer", streetLayer);  \\  \\                 string pointPath = MapPath("App_Data\\points.shp");  \\                 ShapeFileFeatureLayer pointLayer = new ShapeFileFeatureLayer(pointPath);  \\                 pointLayer.ZoomLevelSet.ZoomLevel01.DefaultPointStyle = PointStyles.CreateSimplePointStyle(PointSymbolType.Circle, GeoColor.StandardColors.LightPink,  \\                                                                           GeoColor.StandardColors.Black,10);  \\                 pointLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;  \\                 layerOverlay.Layers.Add("PointLayer", pointLayer);  \\  \\                 string pointPath2 = MapPath("App_Data\\points2.shp");  \\                 ShapeFileFeatureLayer pointLayer2 = new ShapeFileFeatureLayer(pointPath2);  \\                 pointLayer2.ZoomLevelSet.ZoomLevel01.DefaultPointStyle = PointStyles.CreateSimplePointStyle(PointSymbolType.Circle, GeoColor.StandardColors.LightSeaGreen,  \\                                                                           GeoColor.StandardColors.Black, 10);  \\                 pointLayer2.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;  \\                 layerOverlay.Layers.Add("PointLayer2", pointLayer2);  \\  \\                 Map1.CustomOverlays.Add(layerOverlay);  \\  \\                 <nowiki>//</nowiki>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.DefaultPointStyle = PointStyles.CreateSimplePointStyle(PointSymbolType.Circle, GeoColor.FromArgb(150, GeoColor.StandardColors.Red), 10);  \\                 selectLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle = AreaStyles.CreateSimpleAreaStyle(GeoColor.FromArgb(150, GeoColor.StandardColors.Red));  \\                 selectLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;  \\  \\                 LayerOverlay selectOverlay = new LayerOverlay();  \\                 selectOverlay.Layers.Add("SelectLayer", selectLayer);  \\                 selectOverlay.IsBaseOverlay = false;  \\  \\                 Map1.CustomOverlays.Add(selectOverlay);  \\  \\  \\                 ScaleBarAdornmentLayer scaleBar = new ScaleBarAdornmentLayer();  \\                 scaleBar.UnitFamily = UnitSystem.Metric;  \\                 scaleBar.Location = AdornmentLocation.LowerLeft;  \\                 LayerOverlay adornmentLayerOverlay = new LayerOverlay("AdornmentOverlay", false, TileType.SingleTile);  \\                 adornmentLayerOverlay.Layers.Add(scaleBar);  \\                 Map1.CustomOverlays.Add(adornmentLayerOverlay);  \\  \\              }  \\         }  \\  \\         protected void Map1_Click(object sender, MapClickedEventArgs e)  \\         {  \\             <nowiki>//</nowiki>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  \\             <nowiki>//</nowiki>within 1 pixels to where we clicked.  \\             int screenBuffer = 1;  \\             <nowiki>//</nowiki>Here we have to use the ToScreencoordinate function because the MapClickedEventArgs does not provide the mouse screen position, only the  \\             <nowiki>//</nowiki>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);  \\  \\             <nowiki>//</nowiki>Logic for converting screen coordinate values to world coordinate for the spatial query. Notice that the distance buffer for the spatial query  \\             <nowiki>//</nowiki>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 layerOverlay = (LayerOverlay)Map1.CustomOverlays[[0]];  \\  \\             <nowiki>//</nowiki>Loops thru all the layers to find the nearest feature clicked on giving priority to point features, then line features and  \\             <nowiki>//</nowiki>last to polygon features.  \\             <nowiki>//</nowiki>We have that priority order because due to the gemetric nature polygons and then lines are more likely to be clicked on.  \\             Feature closestPointFeature = new Feature();  \\             Feature closestLineFeature = new Feature();  \\             Feature closestPolygonFeature = new Feature();  \\             double minPointDist=  double.MaxValue ;  \\             double minLineDist = double.MaxValue;  \\             double minPolygonDist = double.MaxValue;  \\             foreach (ShapeFileFeatureLayer shapefileLayer in layerOverlay.Layers)  \\             {  \\                 shapefileLayer.Open();  \\                 PointShape pointShape = new PointShape(e.Position.X, e.Position.Y);  \\                 Collection<Feature> tempFeatures = shapefileLayer.FeatureSource.GetFeaturesNearestTo(pointShape, Map1.MapUnit, 1,  \\                                                                                                 ReturningColumnsType.NoColumns);  \\                 shapefileLayer.Close();  \\  \\                 if (tempFeatures.Count > 0)  \\                 {  \\                     BaseShape baseShape = tempFeatures[[0]].GetShape();  \\                     double currentDist = baseShape.GetDistanceTo(pointShape, Map1.MapUnit, DistanceUnit.Meter);  \\                     switch (baseShape.GetType().Name)  \\                     {  \\                         case "MultipolygonShape":  \\                             if ((currentDist < minPolygonDist)&& (currentDist <= distanceBuffer))  \\                             {  \\                                 closestPolygonFeature = tempFeatures[[0]];  \\                                 minPolygonDist = currentDist;  \\                             }  \\                             break;  \\  \\                         case "MultilineShape":  \\                             if ((currentDist < minLineDist)&& (currentDist <= distanceBuffer))  \\                             {  \\                                 closestLineFeature = tempFeatures[[0]];  \\                                 minLineDist = currentDist;  \\                             }  \\                             break;  \\  \\                         case "PointShape":  \\                             if ((currentDist < minPointDist)&& (currentDist <= distanceBuffer))  \\                             {  \\                                 closestPointFeature = tempFeatures[[0]];  \\                                 minPointDist = currentDist;  \\                             }  \\                             break;  \\                     }  \\                 }  \\             }  \\  \\             LayerOverlay selectOverlay = (LayerOverlay)Map1.CustomOverlays[[1]];  \\             InMemoryFeatureLayer selectLayer = (InMemoryFeatureLayer)selectOverlay.Layers[["SelectLayer"]];  \\  \\             selectLayer.InternalFeatures.Clear();  \\  \\             if (minPointDist < double.MaxValue)  \\             {  \\                 selectLayer.InternalFeatures.Add(closestPointFeature);  \\             }  \\             else if (minLineDist < double.MaxValue)  \\             {  \\                 selectLayer.InternalFeatures.Add(closestLineFeature);  \\             }  \\             else if (minPolygonDist < double.MaxValue)  \\             {  \\                 selectLayer.InternalFeatures.Add(closestPolygonFeature);  \\             }  \\  \\             selectOverlay.Redraw();  \\         }  \\     }  \\ }  \\ </source>   |
+<code csharp>
+using System;
+using System.Configuration;
+using System.Collections.ObjectModel;
+using ThinkGeo.MapSuite.Core;
+using ThinkGeo.MapSuite.WebEdition;
+namespace GetFeatureClickedOnWeb2
+{
+    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(-97.7567,30.2701,-97.7361,30.2592);
+                Map1.MapUnit = GeographyUnit.DecimalDegree;
+                Map1.MapTools.MouseCoordinate.Enabled = true;
+                LayerOverlay layerOverlay = new LayerOverlay("StreetOverlay", false, TileType.SingleTile);
+                layerOverlay.IsBaseOverlay = false;
+                string polygonPath = MapPath("App_Data
+polygons.shp");
+                ShapeFileFeatureLayer polygonLayer = new ShapeFileFeatureLayer(polygonPath);
+                polygonLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle = AreaStyles.CreateSimpleAreaStyle(GeoColor.StandardColors.LightGreen);
+                polygonLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;
+                layerOverlay.Layers.Add("PolygonLayer", polygonLayer);
+                string polygonPath2 = MapPath("App_Data
+polygons2.shp");
+                ShapeFileFeatureLayer polygonLayer2 = new ShapeFileFeatureLayer(polygonPath2);
+                polygonLayer2.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle = AreaStyles.CreateSimpleAreaStyle(GeoColor.StandardColors.LightSteelBlue);
+                polygonLayer2.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;
+                layerOverlay.Layers.Add("PolygonLayer2", polygonLayer2);
+                string streetPath = MapPath("App_Data
+Streets.shp");
+                ShapeFileFeatureLayer streetLayer = new ShapeFileFeatureLayer(streetPath);
+                streetLayer.ZoomLevelSet.ZoomLevel01.DefaultLineStyle = LineStyles.LocalRoad1;
+                streetLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;
+                layerOverlay.Layers.Add("StreetLayer", streetLayer);
+                string pointPath = MapPath("App_Data
+points.shp");
+                ShapeFileFeatureLayer pointLayer = new ShapeFileFeatureLayer(pointPath);
+                pointLayer.ZoomLevelSet.ZoomLevel01.DefaultPointStyle = PointStyles.CreateSimplePointStyle(PointSymbolType.Circle, GeoColor.StandardColors.LightPink,
+                                                                          GeoColor.StandardColors.Black,10);
+                pointLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;
+                layerOverlay.Layers.Add("PointLayer", pointLayer);
+                string pointPath2 = MapPath("App_Data
+points2.shp");
+                ShapeFileFeatureLayer pointLayer2 = new ShapeFileFeatureLayer(pointPath2);
+                pointLayer2.ZoomLevelSet.ZoomLevel01.DefaultPointStyle = PointStyles.CreateSimplePointStyle(PointSymbolType.Circle, GeoColor.StandardColors.LightSeaGreen,
+                                                                          GeoColor.StandardColors.Black, 10);
+                pointLayer2.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;
+                layerOverlay.Layers.Add("PointLayer2", pointLayer2);
+                Map1.CustomOverlays.Add(layerOverlay);
+                //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.DefaultPointStyle = PointStyles.CreateSimplePointStyle(PointSymbolType.Circle, GeoColor.FromArgb(150, GeoColor.StandardColors.Red), 10);
+                selectLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle = AreaStyles.CreateSimpleAreaStyle(GeoColor.FromArgb(150, GeoColor.StandardColors.Red));
+                selectLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;
+                LayerOverlay selectOverlay = new LayerOverlay();
+                selectOverlay.Layers.Add("SelectLayer", selectLayer);
+                selectOverlay.IsBaseOverlay = false;
+                Map1.CustomOverlays.Add(selectOverlay);
+                ScaleBarAdornmentLayer scaleBar = new ScaleBarAdornmentLayer();
+                scaleBar.UnitFamily = UnitSystem.Metric;
+                scaleBar.Location = AdornmentLocation.LowerLeft;
+                LayerOverlay adornmentLayerOverlay = new LayerOverlay("AdornmentOverlay", false, TileType.SingleTile);
+                adornmentLayerOverlay.Layers.Add(scaleBar);
+                Map1.CustomOverlays.Add(adornmentLayerOverlay);
+             }
+        }
+        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 1 pixels to where we clicked.
+            int screenBuffer = 1;
+            //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 layerOverlay = (LayerOverlay)Map1.CustomOverlays[0];
+            //Loops thru all the layers to find the nearest feature clicked on giving priority to point features, then line features and
+            //last to polygon features.
+            //We have that priority order because due to the gemetric nature polygons and then lines are more likely to be clicked on.
+            Feature closestPointFeature = new Feature();
+            Feature closestLineFeature = new Feature();
+            Feature closestPolygonFeature = new Feature();
+            double minPointDist=  double.MaxValue ;
+            double minLineDist = double.MaxValue;
+            double minPolygonDist = double.MaxValue;
+            foreach (ShapeFileFeatureLayer shapefileLayer in layerOverlay.Layers)
+            {
+                shapefileLayer.Open();
+                PointShape pointShape = new PointShape(e.Position.X, e.Position.Y);
+                Collection<Feature> tempFeatures = shapefileLayer.FeatureSource.GetFeaturesNearestTo(pointShape, Map1.MapUnit, 1,
+                                                                                                ReturningColumnsType.NoColumns);
+                shapefileLayer.Close();
+                if (tempFeatures.Count > 0)
+                {
+                    BaseShape baseShape = tempFeatures[0].GetShape();
+                    double currentDist = baseShape.GetDistanceTo(pointShape, Map1.MapUnit, DistanceUnit.Meter);
+                    switch (baseShape.GetType().Name)
+                    {
+                        case "MultipolygonShape":
+                            if ((currentDist < minPolygonDist)&& (currentDist <= distanceBuffer))
+                            {
+                                closestPolygonFeature = tempFeatures[0];
+                                minPolygonDist = currentDist;
+                            }
+                            break;
+                        case "MultilineShape":
+                            if ((currentDist < minLineDist)&& (currentDist <= distanceBuffer))
+                            {
+                                closestLineFeature = tempFeatures[0];
+                                minLineDist = currentDist;
+                            }
+                            break;
+                        case "PointShape":
+                            if ((currentDist < minPointDist)&& (currentDist <= distanceBuffer))
+                            {
+                                closestPointFeature = tempFeatures[0];
+                                minPointDist = currentDist;
+                            }
+                            break;
+                    }
+                }
+            }
+            LayerOverlay selectOverlay = (LayerOverlay)Map1.CustomOverlays[1];
+            InMemoryFeatureLayer selectLayer = (InMemoryFeatureLayer)selectOverlay.Layers["SelectLayer"];
+            selectLayer.InternalFeatures.Clear();
+            if (minPointDist < double.MaxValue)
+            {
+                selectLayer.InternalFeatures.Add(closestPointFeature);
+            }
+            else if (minLineDist < double.MaxValue)
+            {
+                selectLayer.InternalFeatures.Add(closestLineFeature);
+            }
+            else if (minPolygonDist < double.MaxValue)
+            {
+                selectLayer.InternalFeatures.Add(closestPolygonFeature);
+            }
+            selectOverlay.Redraw();
+        }
+    }
+}
+</code>
-====TestForm.aspx====
-^ Code ^
-| <source lang="javascript" line="1"><%@ Page Language="C#" AutoEventWireup="true" CodeBehind="TestForm.aspx.cs" Inherits="GetFeatureClickedOnWeb2.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></source>   |
+====TestForm.aspx====
+<code javascript>
+<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="TestForm.aspx.cs" Inherits="GetFeatureClickedOnWeb2.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></code>

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