using System;

using System.Drawing;

using System.Web;

using System.Web.UI;

using GeoAPI.Geometries;

using SharpMap;

using SharpMap.Data;

//using SharpMap.Geometries;

using SharpMap.Layers;

using SharpMap.Rendering.Thematics;

using SharpMap.Styles;

using SharpMap.Web;

using Point = GeoAPI.Geometries.Coordinate;

public partial class Bins : Page

{

private Map myMap;

/// <summary>

/// This method is used for determining the color of country based on attributes.

/// It is used as a delegate for the CustomTheme class.

/// </summary>

/// <param name="row"></param>

/// <returns></returns>

private VectorStyle GetCountryStyle(FeatureDataRow row)

{

VectorStyle style = new VectorStyle();

switch (row["NAME"].ToString().ToLower())

{

case "denmark": //If country name is Danmark, fill it with green

style.Fill = Brushes.Green;

return style;

case "united states": //If country name is USA, fill it with Blue and add a red outline

style.Fill = Brushes.Blue;

style.Outline = Pens.Red;

return style;

case "china": //If country name is China, fill it with red

style.Fill = Brushes.Red;

return style;

default:

break;

}

//If country name starts with S make it yellow

if (row["NAME"].ToString().StartsWith("S"))

{

style.Fill = Brushes.Yellow;

return style;

}

// If geometry is a (multi)polygon and the area of the polygon is less than 30, make it cyan

else if (row.Geometry is IMultiPolygon && (row.Geometry as IMultiPolygon).Area < 30 ||

row.Geometry is IPolygon && (row.Geometry as IPolygon).Area < 30)

{

style.Fill = Brushes.Cyan;

return style;

}

else //None of the above -> Use the default style

return null;

}

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));

//Set a gradient theme on the countries layer, based on Population density

CustomTheme iTheme = new CustomTheme(GetCountryStyle);

VectorStyle defaultstyle = new VectorStyle();

defaultstyle.Fill = Brushes.Gray;

iTheme.DefaultStyle = defaultstyle;

(myMap.Layers[0] as VectorLayer).Theme = iTheme;

//Turn off the river layer and label-layers

myMap.Layers[1].Enabled = false;

myMap.Layers[3].Enabled = false;

myMap.Layers[4].Enabled = false;

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();

myMap.Center = new Point(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);

Image img = myMap.GetMap();

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

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

}

}