using System;

using System.Drawing;

using System.Globalization;

using System.Web.UI;

using GeoAPI.Geometries;

using SharpMap;

using SharpMap.Layers;

using SharpMap.Web.Wms;

public partial class WmsClient : Page

{

private Coordinate Center;

private double Zoom;

protected void Page_Load(object sender, EventArgs e)

{

if (Page.IsPostBack)

{

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

Center = (Coordinate) ViewState["mapCenter"];

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

}

else

{

Center = new Coordinate(0, 0);

Zoom = 360;

//Create the map

GenerateMap();

}

PrintWmsInfo();

}

private void PrintWmsInfo()

{

WmsLayer layWms = MapHelper.GetWmsLayer();

//Get request url for WMS

hlWmsImage.NavigateUrl = layWms.GetRequestUrl(

new Envelope(Center.X - Zoom*0.5, Center.X + Zoom*0.5,

Center.Y - Zoom*0.25, Center.Y + Zoom*0.25),

new Size((int) imgMap.Width.Value, (int) imgMap.Height.Value));

litLayers.Text = "<p><b>WMS Title</b>: " + layWms.ServiceDescription.Title + "<br/>Abstract: <i>" +

layWms.ServiceDescription.Abstract + "</i>";

litLayers.Text += "<br/><b>WMS Layers:</b><br/>";

foreach (Client.WmsServerLayer layer in layWms.RootLayer.ChildLayers)

PrintLayers(layer, layWms);

litLayers.Text += "</ul></p>";

}

/// <summary>

/// Recursive function for retriving layer names

/// </summary>

/// <param name="layer"></param>

/// <param name="layWms"></param>

private void PrintLayers(Client.WmsServerLayer layer, WmsLayer layWms)

{

litLayers.Text += "<li>" + layer.Name;

if (layWms.LayerList.Contains(layer.Name))

litLayers.Text += " (Enabled)";

litLayers.Text += "</li>";

if (layer.ChildLayers != null && layer.ChildLayers.Length > 0)

{

litLayers.Text += "<ul>";

foreach (Client.WmsServerLayer childlayer in layer.ChildLayers)

PrintLayers(childlayer, layWms);

litLayers.Text += "</ul>";

}

}

protected void imgMap_Click(object sender, ImageClickEventArgs e)

{

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

//We set up a simple empty map so we can use the ImageToWorld() method for easy conversion from Image to World coordinates

Map myMap = new Map(new Size(Convert.ToInt32(imgMap.Width.Value), Convert.ToInt32(imgMap.Height.Value)));

myMap.Center = Center;

myMap.Zoom = Zoom;

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

Zoom = Zoom*0.5;

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

Zoom = 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", Center);

ViewState.Add("mapZoom", Zoom);

string ResponseFormat = "maphandler.ashx?MAP=WmsClient&Width=[WIDTH]&Height=[HEIGHT]&Zoom=[ZOOM]&X=[X]&Y=[Y]";

NumberFormatInfo numberFormat_EnUS = new CultureInfo("en-US", false).NumberFormat;

imgMap.ImageUrl = ResponseFormat.Replace("[WIDTH]", imgMap.Width.Value.ToString()).

Replace("[HEIGHT]", imgMap.Height.Value.ToString()).

Replace("[ZOOM]", Zoom.ToString(numberFormat_EnUS)).

Replace("[X]", Center.X.ToString(numberFormat_EnUS)).

Replace("[Y]", Center.Y.ToString(numberFormat_EnUS));

hlCurrentImage.NavigateUrl = imgMap.ImageUrl;

}

}