May 2008 - Posts
I started working on an example using the ADO.NET Data Services (formerly Astoria)
in .NET 3.5 SP!. ADO.NET Data Services uses the Entity Framework to
expose data to clients in a restful manner. Its ideally suited to data
access over ajax clients. For some reason, my sample wouldn't
completely run. I could query and delete, but no inserty or updatey
action would work. The error messages I got were crap merely saying
that the operation failed. What good are those messages? I posted
some messages and I decided to contact Pablo Castro
about the issue. Pablo was his usual helpful self. He gave me a bunch
of suggestions. I went through them and it looked like I needed to
have the VJ# redistributable installed. I then mucked up my VPC
session. I went back and started from the beginning with a fresh VPC.
I installed VJ# redistributable, .NET 3.5 SP1 beta1, Sql Express
Management Studio, and voila, I got meaningful error messages finally.
With the meaningful error messages, it was cake to fix the updatey
problem. The inserty problem magically resolved itself. All was right
with the world. Expect a video podcast on this topic shortly along
with source code examples and things that tripped me up in the process..
I've started a new tag on my blog about .NET 3.5 SP1 features as I write some examples up on them. http://morewally.com/cs/blogs/wallym/archive/tags/.NET+3.5+SP1/default.aspx.
This tag will have all of my posts about new features in .NET 3.5 SP1 along with video podcasts and source code.
As if we don't have enough things that waste our time, follow my comments about life and things upto 140 characters on twitter. My twitter url is http://twitter.com/wbm and enjoy.
PS. If you follow me, I'll follow you, assuming you aren't a twitter spammer.
I just made my LinkedIn profile public. Check it out at http://www.linkedin.com/in/wallymcclure Please check it out and tell the world about us.
It looks like CodeStock is going to happen on August 9. More info to follow soon. Michael Neel is doing a lot of work on it.
Wally
Original Url: http://aspnetpodcast.com/CS11/blogs/asp.net_podcast/archive/2008/05/07/asp-net-podcast-show-112-intro-to-asp-net-ajax.aspx
Subscribe to everything <---- This is what the cool kids are doing.
Subscribe to WMV.
Subscribe to MP4/M4V.
Subscribe to MP3.
Download WMV.
Download M4V.
Download MP3.
Show Notes:
- JSON.
- Web Services .
- Client Side Proxy.
- See it run.
- Visual Studio 2008 really is that good.
- UpdatePanel Intro with the client side events.
- New features coming.
- Upcoming community events.
I've created some new feeds for the ASP.NET Podcast There is still the same general feed. It will have all shows and all of the variations of the shows in it. These include WMV, MP4/M4V, MP3, and whatever else one can throw in it. The rest of the feeds are:
If you have any problems, let me know ASAP!
Wally
Original url: http://aspnetpodcast.com/CS11/blogs/asp.net_podcast/archive/2008/05/05/asp-net-podcast-show-111-asp-net-ajax-with-virtual-earth.aspx
Subscribe.
<-- Everybody needs some, how about you!
Download WMV - Video for PC.
Download M4V - Video for iPod.
Download MP3 - Audio only.
Show Notes:
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"> <html xmlns="http://www.w3.org/1999/xhtml"><head runat="server"> <title>ASP.NET Podcast Mapping Page</title> <asp:ContentPlaceHolder id="head" runat="server"> </asp:ContentPlaceHolder> <script src="http://maps.google.com/maps?file=api&v=2.x&key=ABQIAAAA_mrKwezGRvHyiI2zD3-QjxQyvuBphQwgXhP_kHK6Ww2QlMKTbxQ3mY6sQnMU6V5PMK8wQzOfhkt_Vw" language="javascript" type="text/javascript"></script> <script type="text/javascript" src="http://dev.virtualearth.net/mapcontrol/mapcontrol.ashx?v=6.1"></script> </head><body onunload="GUnload()"> <form id="form1" runat="server"> <asp:ScriptManager ID="sm" runat="server"> <Services> <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"><div id="MapDiv" style="position:relative; width:450px; height: 350px;" ></div><br /><div id="MapInfo"></div> <script language="javascript" type="text/javascript">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;}
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