using System;

using System.Data;

using System.Drawing;

using System.Web;

using System.Web.UI;

using SharpMap;

using SharpMap.Data;

using SharpMap.Data.Providers;

using GeoAPI.Geometries;

using SharpMap.Layers;

using SharpMap.Styles;

using SharpMap.Web;

using Point=GeoAPI.Geometries.Coordinate;

public partial class GeometryFeature : Page

{

private Map myMap;

public VectorLayer CreateGeometryLayer()

{

var gf = new NetTopologySuite.Geometries.GeometryFactory();

var fdt = new FeatureDataTable();

fdt.Columns.Add(new DataColumn("Name", typeof (String)));

fdt.BeginLoadData();

var fdr = (FeatureDataRow)fdt.LoadDataRow(new[] {(object) "Mayence"}, true);

fdr.Geometry = gf.CreatePoint(new Point(8.1, 50.0));

fdt.EndLoadData();

var vLayer = new VectorLayer("GeometryProvider");

vLayer.DataSource = new GeometryFeatureProvider(fdt);

vLayer.SRID = 4326;

return vLayer;

}

protected void Page_Load(object sender, EventArgs e)

{

//Set up the map. We use the method in the App_Code folder for initializing the map

myMap = MapHelper.InitializeMap(new Size((int) imgMap.Width.Value, (int) imgMap.Height.Value));

VectorLayer GeomLayer = CreateGeometryLayer();

LabelLayer layGeomProviderLabel = new LabelLayer("LabelOfTheCityMayence");

layGeomProviderLabel.DataSource = GeomLayer.DataSource;

layGeomProviderLabel.Enabled = true;

layGeomProviderLabel.LabelColumn = "Name";

layGeomProviderLabel.Style = new LabelStyle();

layGeomProviderLabel.Style.ForeColor = Color.AliceBlue;

layGeomProviderLabel.Style.Font = new Font(FontFamily.GenericSansSerif, 14, FontStyle.Bold);

layGeomProviderLabel.Style.Offset = new PointF(4, 4);

layGeomProviderLabel.Style.HorizontalAlignment = LabelStyle.HorizontalAlignmentEnum.Left;

layGeomProviderLabel.Style.VerticalAlignment = LabelStyle.VerticalAlignmentEnum.Bottom;

layGeomProviderLabel.SRID = 4326;

myMap.Layers.Add(GeomLayer);

myMap.Layers.Add(layGeomProviderLabel);

myMap.Center = new Point(8, 50);

myMap.Zoom = 10;

if (Page.IsPostBack)

{

//Page is post back. Restore center and zoom-values from viewstate

myMap.Center = (Point) ViewState["mapCenter"];

myMap.Zoom = (double) ViewState["mapZoom"];

}

else

{

//This is the initial view of the map. Zoom to the extents of the map:

//myMap.ZoomToExtents();

//or center on 0,0 and zoom to full earth (360 degrees)

//myMap.Center = new GeoAPI.Geometries.Coordinate(0,0);

//myMap.Zoom = 360;

//Create the map

GenerateMap();

}

}

protected void imgMap_Click(object sender, ImageClickEventArgs e)

{

//Set center of the map to where the client clicked

myMap.Center = myMap.ImageToWorld(new System.Drawing.Point(e.X, e.Y));

//Set zoom value if any of the zoom tools were selected

if (rblMapTools.SelectedValue == "0") //Zoom in

myMap.Zoom = myMap.Zoom*0.5;

else if (rblMapTools.SelectedValue == "1") //Zoom out

myMap.Zoom = myMap.Zoom*2;

//Create the map

GenerateMap();

}

/// <summary>

/// Creates the map, inserts it into the cache and sets the ImageButton Url

/// </summary>

private void GenerateMap()

{

//Save the current mapcenter and zoom in the viewstate

ViewState.Add("mapCenter", myMap.Center);

ViewState.Add("mapZoom", myMap.Zoom);

//Render map

Image img = myMap.GetMap();

string imgID = Caching.InsertIntoCache(1, img);

imgMap.ImageUrl = "getmap.aspx?ID=" + HttpUtility.UrlEncode(imgID);

}

}