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  • Google Maps API - Marker not showing

    - by popnbrown
    I'm trying to add markers for every single row from a table, that sits on the page. The page is http://www.sravanks.com/first/2013ftcmap.php This is the JS code that's loading the markers: $(document).ready(function() { var mapOptions = { center: new google.maps.LatLng(39.740, -89.503), zoom: 7 }; var map = new google.maps.Map(document.getElementById("map-canvas"), mapOptions); var infowindow = new google.maps.InfoWindow(); /* City Markers */ var cityCircle = new Array(); var i = 0; $.each($('.events tr'), function(index, value) { var name = $(this).find('td:first()').html(); var address = $(this).find('.address').html(); var linkUrl = "http://www.sravanks.com/first/geocode.php?address=" + address; $.ajax({ url: linkUrl }).done(function(data){ var json = $.parseJSON(data.substring(0, data.length-1)); lat = json.results[0].geometry.location.lat; lng = json.results[0].geometry.location.lng; var latlng = new google.maps.LatLng(lat, lng); var marker = new google.maps.Marker({ position: latlng, map: map, icon: 'map-pointer-medium.gif' }); google.maps.event.addListener(marker, 'click', function() { infowindow.setContent(name); infowindow.open(map, marker); cityCircle[i] = new google.maps.Circle({strokeColor: '#00FF00', strokeOpacity: 0.8, strokeWeight: 2, fillColor: '#00FF00', fillOpacity: 0.35, map: map, center: latlng, radius: 144841}); i++; }); }); }); /*Team Markers*/ var markers = {}; var teamName, teamNumber, lat, lng, content; $.each($('.list tr'), function(index, value) { teamName = $(this).find('td.name').html(); teamNumber = $(this).find('td.number').html(); markers[teamNumber] = {}; lat = parseFloat($(this).find('td.lat').html()); lng = parseFloat($(this).find('td.lng').html()); content = "Name: " + teamName + "<br />Number: " + teamNumber; markers[teamNumber]['latlng'] = new google.maps.LatLng(lat, lng); markers[teamNumber]['marker'] = new google.maps.Marker({ position: markers[teamNumber]['latlng'], map: map }); google.maps.event.addListener(markers[teamNumber]['marker'], 'click', function() { infowindow.setContent(content); infowindow.open(map, markers[teamNumber]['marker']); }); }); google.maps.event.addListener(infowindow, 'closeclick', function() { for(var i=0;i<cityCircle.length;i++){ cityCircle[i].setMap(null); } }); }); I've got no errors, but the Team Markers do not show up. The strange thing is that the City Markers do show up. Some more info, the City Markers ajax call is just to a proxy that calls the google geocoding api. Again the link's at http://www.sravanks.com/first/2013ftcmap.php

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  • Silverlight 4 + RIA Services - Ready for Business: Exposing OData Services

    OData is an emerging set of extensions for the ATOM protocol that makes it easier to share data over the web. To show off OData in RIA Services, lets continue our series.       We think it is very interesting to expose OData from a DomainService to facilitate data sharing.   For example I might want users to be able to access my data in a rich way in Excel as well as my custom Silverlight client.   Id like to be able to enable that without writing...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Replication Services as ETL extraction tool

    - by jorg
    In my last blog post I explained the principles of Replication Services and the possibilities it offers in a BI environment. One of the possibilities I described was the use of snapshot replication as an ETL extraction tool: “Snapshot Replication can also be useful in BI environments, if you don’t need a near real-time copy of the database, you can choose to use this form of replication. Next to an alternative for Transactional Replication it can be used to stage data so it can be transformed and moved into the data warehousing environment afterwards. In many solutions I have seen developers create multiple SSIS packages that simply copies data from one or more source systems to a staging database that figures as source for the ETL process. The creation of these packages takes a lot of (boring) time, while Replication Services can do the same in minutes. It is possible to filter out columns and/or records and it can even apply schema changes automatically so I think it offers enough features here. I don’t know how the performance will be and if it really works as good for this purpose as I expect, but I want to try this out soon!” Well I have tried it out and I must say it worked well. I was able to let replication services do work in a fraction of the time it would cost me to do the same in SSIS. What I did was the following: Configure snapshot replication for some Adventure Works tables, this was quite simple and straightforward. Create an SSIS package that executes the snapshot replication on demand and waits for its completion. This is something that you can’t do with out of the box functionality. While configuring the snapshot replication two SQL Agent Jobs are created, one for the creation of the snapshot and one for the distribution of the snapshot. Unfortunately these jobs are  asynchronous which means that if you execute them they immediately report back if the job started successfully or not, they do not wait for completion and report its result afterwards. So I had to create an SSIS package that executes the jobs and waits for their completion before the rest of the ETL process continues. Fortunately I was able to create the SSIS package with the desired functionality. I have made a step-by-step guide that will help you configure the snapshot replication and I have uploaded the SSIS package you need to execute it. Configure snapshot replication   The first step is to create a publication on the database you want to replicate. Connect to SQL Server Management Studio and right-click Replication, choose for New.. Publication…   The New Publication Wizard appears, click Next Choose your “source” database and click Next Choose Snapshot publication and click Next   You can now select tables and other objects that you want to publish Expand Tables and select the tables that are needed in your ETL process In the next screen you can add filters on the selected tables which can be very useful. Think about selecting only the last x days of data for example. Its possible to filter out rows and/or columns. In this example I did not apply any filters. Schedule the Snapshot Agent to run at a desired time, by doing this a SQL Agent Job is created which we need to execute from a SSIS package later on. Next you need to set the Security Settings for the Snapshot Agent. Click on the Security Settings button.   In this example I ran the Agent under the SQL Server Agent service account. This is not recommended as a security best practice. Fortunately there is an excellent article on TechNet which tells you exactly how to set up the security for replication services. Read it here and make sure you follow the guidelines!   On the next screen choose to create the publication at the end of the wizard Give the publication a name (SnapshotTest) and complete the wizard   The publication is created and the articles (tables in this case) are added Now the publication is created successfully its time to create a new subscription for this publication.   Expand the Replication folder in SSMS and right click Local Subscriptions, choose New Subscriptions   The New Subscription Wizard appears   Select the publisher on which you just created your publication and select the database and publication (SnapshotTest)   You can now choose where the Distribution Agent should run. If it runs at the distributor (push subscriptions) it causes extra processing overhead. If you use a separate server for your ETL process and databases choose to run each agent at its subscriber (pull subscriptions) to reduce the processing overhead at the distributor. Of course we need a database for the subscription and fortunately the Wizard can create it for you. Choose for New database   Give the database the desired name, set the desired options and click OK You can now add multiple SQL Server Subscribers which is not necessary in this case but can be very useful.   You now need to set the security settings for the Distribution Agent. Click on the …. button Again, in this example I ran the Agent under the SQL Server Agent service account. Read the security best practices here   Click Next   Make sure you create a synchronization job schedule again. This job is also necessary in the SSIS package later on. Initialize the subscription at first synchronization Select the first box to create the subscription when finishing this wizard Complete the wizard by clicking Finish The subscription will be created In SSMS you see a new database is created, the subscriber. There are no tables or other objects in the database available yet because the replication jobs did not ran yet. Now expand the SQL Server Agent, go to Jobs and search for the job that creates the snapshot:   Rename this job to “CreateSnapshot” Now search for the job that distributes the snapshot:   Rename this job to “DistributeSnapshot” Create an SSIS package that executes the snapshot replication We now need an SSIS package that will take care of the execution of both jobs. The CreateSnapshot job needs to execute and finish before the DistributeSnapshot job runs. After the DistributeSnapshot job has started the package needs to wait until its finished before the package execution finishes. The Execute SQL Server Agent Job Task is designed to execute SQL Agent Jobs from SSIS. Unfortunately this SSIS task only executes the job and reports back if the job started succesfully or not, it does not report if the job actually completed with success or failure. This is because these jobs are asynchronous. The SSIS package I’ve created does the following: It runs the CreateSnapshot job It checks every 5 seconds if the job is completed with a for loop When the CreateSnapshot job is completed it starts the DistributeSnapshot job And again it waits until the snapshot is delivered before the package will finish successfully Quite simple and the package is ready to use as standalone extract mechanism. After executing the package the replicated tables are added to the subscriber database and are filled with data:   Download the SSIS package here (SSIS 2008) Conclusion In this example I only replicated 5 tables, I could create a SSIS package that does the same in approximately the same amount of time. But if I replicated all the 70+ AdventureWorks tables I would save a lot of time and boring work! With replication services you also benefit from the feature that schema changes are applied automatically which means your entire extract phase wont break. Because a snapshot is created using the bcp utility (bulk copy) it’s also quite fast, so the performance will be quite good. Disadvantages of using snapshot replication as extraction tool is the limitation on source systems. You can only choose SQL Server or Oracle databases to act as a publisher. So if you plan to build an extract phase for your ETL process that will invoke a lot of tables think about replication services, it would save you a lot of time and thanks to the Extract SSIS package I’ve created you can perfectly fit it in your usual SSIS ETL process.

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  • The Evolution of Search: A History of Google Search [Video]

    - by Jason Fitzpatrick
    Internet search has changed enormously in the last decade; this video tour of Google evolving search strategies shows us where we’ve been and where we’re going. In the above video Google staff reflect on the last decade of search, innovations at Google, and where they’re taking the search engine experience in the future. While the video clearly has a Google bias (they produced it after all) it’s still an interesting look at how Google and internet search as a whole have changed over the years. The Evolution of Search in Six Minutes [The Official Google Blog] How to See What Web Sites Your Computer is Secretly Connecting To HTG Explains: When Do You Need to Update Your Drivers? How to Make the Kindle Fire Silk Browser *Actually* Fast!

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  • Add a non-Google Tasks List to Chrome

    - by Asian Angel
    Most people rely on a task list to help them remember what they need to do but not everyone wants one that is tied to a Google account. If you have been wanting an independent tasks list then join us as we look at the Tasks extension for Google Chrome. Tasks in Action As soon as you have finished installing the extension you are ready to start adding new tasks to your list. Enter your task into the “Text Area” and press “Enter” to add the task to the list. Note: Your tasks list will be retained (in the order you set) when you close and then reopen your browser. In just moments you can have your task list ready to go. Notice that there is also a “numerical indicator” attached to the “Toolbar Button” so that you will always know how many tasks you have left to complete. You can use the “drag and drop” function to rearrange your list into a more proper order if needed. When you are finished with a task all that you will need to do is click on the “Checkmark” to remove it from the list. If you need to make a new entry similar to an existing one simply right click and the text is automatically pasted into the “Text Area”. Make any desired changes and press “Enter” to add your new task to the list. Prefer to skip using the drop-down window? Click on “Tasks” at the top to open your list in a new tab instead. The tasks list looked very nice in our new tab. Being able to use the style that best suits your needs makes this a very convenient extension. Conclusion The Tasks extension is a perfect fit for anyone who needs a tasks list available but does not want to be tied down with an online account. Quick, simple and best of all hassle free. Links Download the Tasks extension (Google Chrome Extensions) Similar Articles Productive Geek Tips Turn Chrome’s New Tab Page into a Google Tasks PageAccess Google Tasks in Chrome the Easy WayHow to Make Google Chrome Your Default BrowserAdd a To-Do List to Chrome’s New Tab PageAccess Remember The Milk in Google Chrome the Easy Way TouchFreeze Alternative in AutoHotkey The Icy Undertow Desktop Windows Home Server – Backup to LAN The Clear & Clean Desktop Use This Bookmarklet to Easily Get Albums Use AutoHotkey to Assign a Hotkey to a Specific Window Latest Software Reviews Tinyhacker Random Tips Revo Uninstaller Pro Registry Mechanic 9 for Windows PC Tools Internet Security Suite 2010 PCmover Professional Test Drive Mobile Phones Online With TryPhone Ben & Jerry’s Free Cone Day, 3/23/10 New Stinger from McAfee Helps Remove ‘FakeAlert’ Threats Google Apps Marketplace: Tools & Services For Google Apps Users Get News Quick and Precise With Newser Scan for Viruses in Ubuntu using ClamAV

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  • Implementing User-Defined Hierarchies in SQL Server Analysis Services

    To be able to drill into multidimensional cube data at several levels, you must implement all of the hierarchies on the database dimensions. Then you'll create the attribute relationships necessary to optimize performance. Analysis Services hierarchies offer plenty of possibilities for displaying the data that your business requires. Rob Sheldon continues his series on SQL Server Analysis Services 2008.

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  • How To Use Google Drive on Linux: 2 Unofficial Solutions

    - by Chris Hoffman
    When Google announced Google Drive, they promised Linux support. That was about 7 months ago. While Google said Google Drive for Linux was “still a priority” back in July, it seems it’s no longer a priority. If you want to use Google Drive on Linux, both Insync and grive can bring Google Drive to Linux. They’re not official, but they’re better than nothing if you’re waiting for an official client. How To Boot Your Android Phone or Tablet Into Safe Mode HTG Explains: Does Your Android Phone Need an Antivirus? How To Use USB Drives With the Nexus 7 and Other Android Devices

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  • Will rewriting your .htaccess to 404 to return search results from your site negatively effect your ranking in Google?

    - by leeand00
    Depending on the type of site that you are running, it may or may not be advantageous to display search results instead of a 404 page, when someone visits a non-existent page on your site. I believe that the site I've been maintaining recently would benefit from this as it is the site of a publication. With a publication the more people you can get to read your site the better. But after reading up on how Google ranks the "quality" of your site, where you will appear in SERPs, based on how much the meta text of a page relates to the content of the page, I have to wonder if making a 404 page link to the search results would harm the "quality" of your site in Google eyes.

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  • How to make google analytics report on two domains as though they are one site?

    - by Ben
    We have a main site that Google analytics is currently running fine on (www.ourcompany.com). We have a page that is technically part of the site (same design, etc.) but is hosted on another server/domain for various business reasons (www.ourparentcompany.com/ourcompanyapp/). Do we just add the normal google analytics code to the bottom of that page? Or is there something more we have to do? If there isn't anything more then couldn't anyone just take your GA code and start reporting analytics to your profile from their site?

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  • Google's process for publishing/modifying pages [closed]

    - by Glenn Dayton
    I'm assuming that a group of people at Google have control of certain sections of google.com, but how does Google make sure that employees don't accidentally or intentionally sabotage the website? Does Google use Adobe Contribute or some similar product for sharing/publishing the website. Do employees use WebDAV, FTP, SFTP, or SSH to publish the site. Since Google has hundreds of thousands of servers it probably takes some time for its servers to update. Do they transmit the new copy of the website to all servers before publishing at once? This question does not apply to Google editing a database and having a page reflect the database's changes. It applies to employees editing the source code and/ or back end of the site.

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  • The new Google Analytics - what new useful features have you found?

    - by Rob
    If you don't know already a new version of Google Analytics has just come out. On first initial views it doesn't seem like much of an improvement on the previous version. There's lot's linking to Google's social stats but I'm yet to see the value of that. Also it doesn't seem to make the best use of the important data, it's tending to push referral sites, keywords to the back and bring the less important data to the front. Is that a sign of things to come??? One feature I did find interesting was the visitors flow as it shows the visitors path through your site. What new features have you found useful/interesting?

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  • Is it possible to transfer Google Authorship?

    - by Stephanus Yanaputra
    Is it possible to transfer Google Authorship from one account to another? Scenario: I have user A who is a legitimate Google Author in my WordPress site. When I search the 'keyword' in Google, his name and photo will show up in the search result. One day A left the company, so we don't want to use his name again as an author, and transfer it to another person which is B. Technically speaking, I can just alter the display name and Google+ Profile URL of A to B. And then I probably can notify Google of the changes happening. But what will happen then? Will Google get confused and think that I'm doing scam? Is doing this action even correct in the first place?

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  • Silverlight 4 + RIA Services - Ready for Business: Exposing WCF (SOAP\WSDL) Services

    Continuing in our series, I wanted to touch on how a RIA Services can be exposed as a Soap\WSDL service.   This is very useful if you want to enable the exact same business logic\data access logic is available to clients other than Silverlight.    For example to a WinForms application or WPF or even a console application.  SOAP is a particularly good model for interop with the Java\JEE world as well.    First you need to add a reference to Microsoft.ServiceModel.DomainSerivves.Hosting.EndPoints...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Silverlight 4 + RIA Services - Ready for Business: Exposing WCF (SOAP\WSDL) Services

    Continuing in our series, I wanted to touch on how a RIA Services can be exposed as a Soap\WSDL service.   This is very useful if you want to enable the exact same business logic\data access logic is available to clients other than Silverlight.    For example to a WinForms application or WPF or even a console application.  SOAP is a particularly good model for interop with the Java\JEE world as well.    First you need to add a reference to Microsoft.ServiceModel.DomainSerivves.Hosting.EndPoints...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Why google isn't updating my site title in search results? [closed]

    - by SharkTheDark
    Possible Duplicate: Google doesn't seem to update the description or title of my homepage I had my domain for few days before I uploaded site to it, and it had one title, and then when I uploaded content it should get new title, but with my misunderstanding of WordPress it had blocked robots.txt and keyword with no-index and no-follow. But I removed that like 7 days ago, and I see in reports that Google bot is crawling over my site, but my site title isn't updating, it still has old domain title when site wasn't there... My robots.txt has now: User-agent: * Allow: / I have clear title tag on every page. How long does it take to update? Do I need to check something else?

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  • Adding users to multiple/all sites in Google Webmaster Tools?

    - by Christian
    I didn't find an answer to this, but maybe I didn't use the right terms for my search. So I'm sorry if this is a duplicate. Anyway, my situation is this: the company I work at manages a lot of sites (100+), and we've recently put them all into Google Webmaster Tools under my Google account, which was tedious enough. Now two coworkers are supposed to be added as users for each site, so they can see the data and manage stuff there as well. But I can only find an option to add users for a single site, not for all sites that are currently associated with my account. Do I really have to go through more than a hundred sites one by one and add the two users to each of them, or is there some way to add both users to all/multiple sites at once?

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  • Google domains. eNom vs Godaddy?

    - by JavaRocky
    Can someone help me understand the benefits and disadvantages of each domain registrar and using them with google apps? I have used godaddy before but not enom. I just don't want to buy a bunch of domains and then later regret not changing the domain registrar when i registered them. I will also be using google app engine and i would like to ultimately have a subdomain configured to use amazon cloud front.

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  • Turn Off Google Chrome Annoying Link Hover

    - by Volomike
    I like Google Chrome a lot, but there are two problems I have with it. The Address Bar search history feature that I want to turn off, and the feature where I hover over a hyperlink and in the bottom lefthand corner it shows a light blue hover tooltip about where that link goes. I really don't care where a given link goes and wish I could turn that feature off, even if I have to install a Google Chrome Extension. So, for these two reasons, I will not install Google Chrome as my primary browser and will remain with Firefox. So, is there a fix to turn the annoying link hover tooltip feature off?

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  • Have to enter google sites through second-level domain

    - by Anton Geraschenko
    I'm having the same problem as this guy. I own two domains hosted on google sites, mydomain.com and mydomain.net. When I go to mydomain.com, it redirects me to the site located at www.mydomain.com (this is the desired behavior). This used to also work on mydomain.net, but now when I go to mydomain.net, I get a Google 404. To see the content, I have to go to www.mydomain.net. As far as I can tell, the DNS settings and Google apps settings for both domains are identical. Does anybody have any idea about what could be happening?

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  • Removing bing from my google search bar when I open a new tab

    - by user329869
    Bing has rudely planted its self on my "open new tab" so above bing my regular google is there but below is the irritating bing search bar! I have tried everything I know of to get rid of it and it will not go! I can not find it listed under my settings, control panel and/or uninstall! This is the second time bing has made its unwelcome tush comfy in my google area! How frustrating! I miss my mac book pro! Removing bing from my google search bar when I open a new tab.

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  • Google Apps for Business on a separate infrastructure?

    - by dustin
    Does anyone know if Google Apps for Business edition hosts the apps (gmail, calendar, etc.) on a physically separate infrastructure than the Standard (free) infrastructure? We've been growing increasingly annoyed with the lost/severely delayed email messages, downtime, etc. of Google Apps (standard) over time, and we are wondering if moving to the paid version would bring any benefits. Specifically, if the Business edition is not in some way on a different physical infrastructure, and we are in essence paying for a few small perks but still run on the usual standard/free setup, then we would probably have the same (or just as many) issues with the Business version. I've emailed Google's sales team responsible for GApps, but haven't heard anything back in 4 days, which already doesn't speak well for the service. So, anyone have any insight into this? Thanks in advance for any and all help :)

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  • Import Google Voice Contacts Into iPhone

    - by Nalandial
    What I'd like to do is have my Google Voice contacts available on my iPhone, not the other way around. I recently had to restore the phone to factory defaults and it's a pain to manually enter all them all. When I make a new GMail e-mail account on my iPhone it won't let me import contacts from my Google account, but even if it did I don't want every single contact in my phone. Google for some reason adds every single person I've ever sent e-mails to into my contacts list, which as you can imagine is quite a large list by now. Does anyone have any suggestions for how to do this?

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  • How To: Transfer Categories in Outlook 2007 from One Installation to Another Using Google Sync

    - by nicorellius
    I use Outlook 2007 for email. I also happen to use the categories for organizing my mail. This function is cool, because you can use keyboard shortcuts that make categorizing mail quick and easy. The problem I am having is that, since I use Google Apps Sync at home and at work, I can't seem to figure out how to transfer the existing category assignments that I spent months creating at work. As my email comes and goes, I assign this and that, with thousands of messages all belonging to specific categories. When I finally installed and started using Google Apps Sync at home, the synchronization process works great, but all my messages are blank, i.e., don't have the color categories I assigned at work. What's worse, I actually changed computers at work, and now am facing the same problem on the new workstation. Using: Windows XP Pro, Outlook 2007, Google Apps. Anyone run into this and find a solution?

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  • Google docs spreadsheet not loading

    - by Pythonista's Apprentice
    I have a Google spreadsheet with a lot of very important data and some scripts that where working well. At some point, the brownser crash and I reload the page. After that, I can't acess that (only that!) spreadsheet any more! I try it from other Google accounts but it doesn't work. All I get is the "Loading..." message in the brownser tab and nothing more (the loading process never completes). I also can't: copy the file or download it! Ie, I can lose all the information in my spreadsheet and also lose all my scripts! (I never think something like this could hapen with a Google Product) How can I solve this problem? Thanks in advance for any help!

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  • Building services with .Net Part 1

    - by Allan Rwakatungu
    On the 26th of May 2010 , I made a presentation to the .NET user group meeting (thanks to Malisa Ncube for organizing this event every month … ). If you missed my presentation , we talked about why we should all be building services … better still using the .NET framework. This blog post is an introduction to services , why you would want to build services and how you can build services using the .NET framework. What is a service? OASIS defines service as "a mechanism to enable access to one or more capabilities, where the access is provided using a prescribed interface and is exercised consistent with constraints and policies as specified by the service description." [1]. If the above definition sounds to academic , you can also define a service as loosely coupled units of functionality that have no calls to each other embedded in the. Instead of services embedding calls to each other in their service code they use defined protocols that describe how services pass and parse messages. This is a good way to think about services if you’re from an objected oriented background. While in object oriented programming functions make calls to each other, in service oriented programming, functions pass messages between each other. Why would you want to use services? 1. If your enterprise architecture looks like this   Services are the building blocks for SOA . With SOA you can move away from the sphaggetti infrastructure that is common in most enterprises. The complexity or lack of visibility of the integration points in your enterprises makes it difficult and costly to implement new initiatives and changes into the business - and even impossible in some cases - as it is not possible to identify the impact a change in one system might have to other systems. With services you can move to an architecture like this Your building blocks from Spaghetti infrastructure to something that is more well-defined and manageable to achieve cost efficiency and not least business agility - enabling you to react to changes in the market with speed and achieve operational efficiency and control are services. 2. If you want to become the Gates or Zuckerburger. Have you heard about Web 2.0 ? Mashups? Software as a service (SAAS) ? Cloud computing ?   They all offer you the opportunity to have scalable but low cost business models and they built using services.  Some of my favorite companies that leverage services for their business models include  https://www.salesforce.com/ (cloud CRM) http://www. twitter.com (more people use twitter clients built by 3rd parties than their official clients) http://www.kayak.com/ (compares data from other travel sites to give information to users in one location) Services with the .NET framework      If you are a .NET developer and you want to develop services, Windows Communication Framework (WCF) is the tool for you. WCF is Microsoft’s unified programming model (service model) for building service oriented applications. ( Before .NET 3.0 you had several models for programming services in .NET including .NET remoting, Web services (ASMX), COM +, Microsoft Messaging queuing (MSMQ) etc, after .NET 3.0 the programming model was unified into one i.e. WCF ). Windows Communication Framework (WCF) provides you 1. An Software Development Kit (SDK) for creating SOA applications 2. A runtime for running services on the Windows platform Why should you use Windows Communication Foundation if you’re programming services?   1. It supports interoperable and open standards e.g. WS* protocols for programming SOAP services 2. It has a unified programming model. Whether you use TCP or Http or Pipes or transmitting using Messaging Queues, programmers need to learn just one way to program. Previously you had .NET remoting, MSMQ, Web services, COM+ and they were all done differently 3. Productive programming model You don’t have to worry about all the plumbing involved to write services. You have a rich declarative programming model to add stuff like logging, transactions, and reliable messages in-built in the Windows Communication Framework. Understanding services in WCF The basic principles of WCF are as easy as ABC A – Address This is where the service is located B- Binding This describes how you communicate with the service e.g. Use TCP, HTTP or both. How to exchange security information with the service etc. C – Contract This defines what the service can do. E.g. Pay water bill, Make a phone call A - Addresses In WCF, an address is a combination of transport, server name, port and path Example addresses may include http://localhost:8001 net.tcp://localhost:8002/MyService net.pipe://localhost/MyPipe net.msmq://localhost/private/MyService net.msmq://localhost/MyService B- Binding   There are numerous ways to communicate with services , different ways that a message can be formatted/sent/secured, that allows you to tailor your service for the compatibility/performance you require for your solution. Transport You can use HTTP TCP MSMQ , Named pipes, Your own custom transport etc Message You  can send a plain text binary, Message Transmission Optimization Mechanism (MTOM) message Communication security No security Transport security Message security Authenticating and authorizing callers etc Behaviour You service can support Transactions Be reliable Use queues Support ajax etc C - Contract You define what your service can do using Service contracts :- Define operations that your service can do, communications and behaviours Data contracts :- Define the messages that are passed from and into your service and how they are formatted Fault contracts :- Defines errors types in your service   As an example, suppose your service service shows money. You define your service contract using a interface [ServiceContract] public interface IShowMeTheMoney {   [OperationContract]    Money Show(); } You define the data contract by annotating a class it with the Data Contract attribute and fields you want to pass in the message as Data Members. (Note:- In the latest versions of WCF you dont have to use attributes if you passing all the objects properties in the message) [DataContract] public Money {   [DataMember]   public string Currency { get; set; }   [DataMember]   public Decimal Amount { get; set; }   public string Comment { get; set; } } Features of Windows Communication Foundation Windows Communication Foundation is not only simple but feature rich , offering you several options to tweak your service to fit your business requirements. Some of the features of WCF include 1. Workflow services You can combine WCF with Windows WorkFlow Foundation (WWF) to write workflow type services 2. Control how your data (messages) are transferred and serialized e.g. you can serialize your business objects as XML or binary 3. control over session management , instance creation and concurrency management without writing code if you like 4. Queues and reliable sessions. You can store messages from the sending client and later forward them to the receiving application. You can also guarantee that messages will arrive at their destincation. 5.Transactions:  You can have different services participate in a transaction operations that can be rolled back if needed 6. Security. WCF has rich features for authorization and authentication  as well as keep audit trails 7. Web programming model. WCF allows developers to expose services as non SOAP endpoints 8. Inbuilt features that you can use to write JSON and services that support AJAX applications And lots more In my next blog I will show you how you can use WCF features to write a real world business service.               Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 ]] /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}

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