ASP.NET Podcast Show #113 - Deep Dive into the ASP.NET AJAX UpdatePanel

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ASP.NET Podcast Show #111 - ASP.NET AJAX with Virtual Earth

2008-05-05T00:00:00Z

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Show Notes:

Upcoming events.
URLs of importance, so important that your life depends on them.
Mapping with Virtual Earth.
Web Services.
Client Script.
IIS7 book.

Source Code:

Master Page:

<%@ Master Language="C#" AutoEventWireup="true" CodeFile="MasterPage.master.cs" Inherits="MasterPage" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<title>ASP.NET Podcast Mapping Page</title>

<asp:ContentPlaceHolder id="head" runat="server">

</asp:ContentPlaceHolder>

</head>

<asp:ScriptManager ID="sm" runat="server">

<asp:ServiceReference Path="~/GetMapData.asmx" />

</Services>

</asp:ScriptManager>

<div>

<asp:ContentPlaceHolder id="ContentPlaceHolder1" runat="server">

</asp:ContentPlaceHolder>

</div>

</form>

</body>

</html>

ASP.NET Page:

<%@ Page Language="C#" MasterPageFile="~/MasterPage.master" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="Live_Default" Title="Virtual Earth Page" %>

<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">

</asp:Content>

<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">

var Map;

function pageLoad()

{

GetMapData.MapData(SetupMap);

}

function SetupMap(result)

{

var Lat = result.Center.Lat;

var Lon = result.Center.Lon;

var ZoomLevel = result.ZoomLevel;

var MapView, TopLeft, BottomRight;

Map = new VEMap('MapDiv');

Map.LoadMap(new VELatLong(Lat, Lon), ZoomLevel ,'h' ,false);

MapView = Map.GetMapView();

TopLeft = MapView.TopLeftLatLong;

BottomRight = MapView.BottomRightLatLong;

//TopleftLatLong and BottomRightLatLong return a VELatLong object.

Map.AttachEvent("onchangeview", MapChangedView);

GetMapData.GetPointData(10, TopLeft.Latitude, TopLeft.Longitude,

BottomRight.Latitude, BottomRight.Longitude, GetDataSuccess);

}

function GetDataSuccess(result)

{

var i = 0;

var Lat, Lon;

$get("MapInfo").innerHTML = "";

for(i=0;i<result.length;i++)

{

Lat = result[i].Location.Lat;

Lon = result[i].Location.Lon;

var shape = new VEShape(VEShapeType.Pushpin, new VELatLong(Lat, Lon));

shape.SetTitle("Title: " + i);

shape.SetDescription(result[i].Description);

Map.AddShape(shape);

$get("MapInfo").innerHTML += "Point Location - Lat: " +

result[i].Location.Lat + " Lon: " + result[i].Location.Lon + "<br />";

}

function MapChangedView(e)

{

Map.DeleteAllShapes();

MapView = Map.GetMapView();

TopLeft = MapView.TopLeftLatLong;

BottomRight = MapView.BottomRightLatLong;

GetMapData.GetPointData(10, TopLeft.Latitude, TopLeft.Longitude,

BottomRight.Latitude, BottomRight.Longitude, GetDataSuccess);

}

</script>

</asp:Content>

Web Service:

using System;

using System.Collections;

using System.Collections.Generic;

using System.Web;

using System.Web.Services;

using System.Web.Services.Protocols;

using System.Web.Script.Services;

/// <summary>

/// Summary description for GetMapData

/// </summary>

[WebService(Namespace = "http://tempuri.org/")]

[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]

[ScriptService]

public class GetMapData : System.Web.Services.WebService {

public GetMapData () {

//Uncomment the following line if using designed components

//InitializeComponent();

}

[WebMethod]

[GenerateScriptType(typeof(MapData))]

public MapData MapData()

{

MapData md = new MapData();

LatLon ll = new LatLon();

ll.Lat = 36;

ll.Lon = -84;

md.Center = ll;

md.ZoomLevel = 8;

return (md);

}

[WebMethod]

[GenerateScriptType(typeof(PointData))]

public PointData[] GetPointData(int PointCount,

double ULLat, double ULLon,

double LRLat, double LRLon)

{

int i = 0;

double PTLat, PTLon;

double LatDelta, LonDelta;

Random rd = new Random();

PointData pd;

LatLon ll;

List<PointData> pdl = new List<PointData>();

LatDelta = ULLat - LRLat;

LonDelta = ULLon - LRLon;

for (i = 0; i < PointCount; i++)

{

pd = new PointData();

ll = new LatLon();

ll.Lat = LRLat + LatDelta * rd.NextDouble();

ll.Lon = LRLon + LonDelta * rd.NextDouble();

pd.Location = ll;

pd.Description = "Point number: " + i.ToString();

pdl.Add(pd);

}

return (pdl.ToArray());

}

public class MapData

{

public LatLon Center;

public int ZoomLevel;

}

public class LatLon

{

public double Lat;

public double Lon;

}

public class PointData

{

public LatLon Location;

public string Description;

}