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  • NHibernate Pitfalls: Cascades

    - by Ricardo Peres
    This is part of a series of posts about NHibernate Pitfalls. See the entire collection here. For entities that have associations – one-to-one, one-to-many, many-to-one or many-to-many –, NHibernate needs to know what to do with their related entities, in three particular moments: when saving, updating or deleting. In particular, there are two possible behaviors: either ignore these related entities or cascade changes to them. NHibernate allows setting the cascade behavior for each association, and the default behavior is not to cascade (ignore). The possible cascade options are: None Ignore, this is the default Save-Update If the entity is being saved or updated, also save any related entities that are either not saved or have been modified and associate these related entities to the root entity. Generally safe Delete If the entity is being deleted, also delete the related entities. This is only useful for parent-child relations Delete-Orphan Identical to Delete, with the addition that if once related entity is removed from the association – orphaned –, also delete it. Also only for parent-child All Combination of Save-Update and Delete, usually that’s what we want (for parent-child relations, of course) All-Delete-Orphan Same as All plus delete any related entities who lose their relationship In summary, Save-Update is generally what you want in most cases. As for the Delete variations, they should only be used if the related entities depend on the root entity (parent-child), so that deleting the root entity and not their related entities would result in a constraint violation on the database.

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  • NHibernate Pitfalls: Private Setter on Id Property

    - by Ricardo Peres
    Having a private setter on an entity’s id property may seem tempting: in most cases, unless you are using id generators assigned or foreign, you never have to set its value directly. However, keep this in mind: If your entity is lazy and you want to prevent people from setting its value, make the setter protected instead of private, because it will need to be accessed from subclasses of your entity (generated by NHibernate); If you use stateless sessions, you can perform some operations which, on regular sessions, require you to load an entity, without doing so, for example: 1: using (IStatelessSession session = factory.OpenStatelessSession()) 2: { 3: //delete without first loading 4: session.Delete(new Customer { Id = 1 }); 5:  6: //insert without first loading 7: session.Insert(new Order { Customer = new Customer { Id = 1 }, Product = new Product { Id = 1 } }); 8:  9: //update without first loading 10: session.Update(new Order{ Id = 1, Product = new Product{ Id = 2 }}) 11: }

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  • Know more about Assembly

    - by Ralax
    If you want to know what an assembly does, you can use Reflector to refactor the assembly and check the codes. If you want to know why binding assembly failed, you can use Assembly Binding Log Viewer to check it. Also you should set HKLM\Software\Microsoft\Fusion\ForceLog registry value to 1 . When the assembly is used, you want to know what the assembly uses, you can use Process Explorer ....(read more)

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  • Team Foundation Service–now for everyone

    - by nmarun
    I heard an announcement regarding TFS being opened for all. I’ve been wanting to have a source control for my personal projects. The set up was an unbelievably simple 3 step process. Signup at http://tfs.visualstudio.com/en-us/ using an account name of your preference Your source control server is something like https://[account name].visualstudio.com. Create your team project choosing a process template of your preference You now have a source control for all your projects. You can connect to this...(read more)

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  • SQL Server 2008 R2 Launch Event - Montreal

    - by guybarrette
    If you’re into SQL Server, you may want to attend the free 2008 R2 launch event that will take place on May 26th, 2010 in Montreal. Agenda: 8:00 - 9:00am : Registration and Breakfast 9:00 – 9:15am:  Welcome and Introductions 9:15 – 10:00am:  Keynote Presentation 10:00 - 10:15am: Morning break 10:15 – 11:45am: SQL Server Presentation 11:45 – 12:45pm: Lunch 12:45 – 1:45pm: Track Session 1 1:45 – 2:45pm: Track Session 2 2:45 – 3:00pm: Afternoon break 3:00 - 4:00pm: Track Session 3 Track Descriptions DBA TRACK Session 1: Ensure Business Continuity with SQL Server 2008 R2,  Windows Server 2008 & Hyper-V Live Migration Session 2: Simplify management of your SQL Server data platform with Multi-server Management Session 3: Deliver unprecedented access to business-critical data at a lower TCO with SQL Server 2008 R2 Parallel Data Warehouse BI TRACK Session1: Enable Managed Self-service BI with Power Pivot for Excel and SharePoint 2010 Session 2: Achieve Rapid Reporting with Reporting Services and Report Builder 3.0 Session 3: Importance of Master Data Management Dev - Visual Studio TRACK Session 1: Developing SQL Applications with Visual Studio 2010 Session 2:Managing Change for SQL Server applications using Team Foundation Server  Session 3: Targeting SQL Azure using Visual Studio   Register here var addthis_pub="guybarrette";

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  • The Web Weekly Newsletter

    - by dwahlin
    Several months ago I created a few FlipBoard magazines that a ton of developers (over 50,000!) have used to access content on JavaScript, HTML5, AngularJS, Azure, XAML, Web API, and more. While the feedback on the magazines has been super positive, several people have asked about having the content pushed to them. I’m generally too busy to remember to go check a particular link on a regular basis so I definitely understood and agree with the comments. I’m happy to announce a new newsletter I’m calling the Web Weekly. It’ll highlight content across the different FlipBoard magazines plus other sources and go out to subscribers a few times a month (weekly when possible). The first issue is ready to go and includes a “video highlights” segment I created to show some of my favorite content in the first issue. If you’re interested in staying on top of all the cutting edge Web technologies feel free to subscribe below!   Here’s a sample of some of the articles included:     Here’s the video from the first edition of the newsletter:   Subscribe to the newsletter below….

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  • Implementing Ads on any page in your Windows 8 XAML app–part 2

    - by nmarun
    In my previous article , you saw how you can start implementing ads on some of the page templates. In this one, we’ll see how we can add something called ‘interstitial ads’ – ads that appear as part of the content in your app. I have added a Grouped Items page to my project. My data model is set to show a few appliances. I have a BaseModel class and the ApplianceModel that inherits the BaseModel class has two properties to represent an appliance. The ProductHolder acts as a container for a list of...(read more)

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  • IEnumerator.Current property and IEnumerator.MoveNext method

    - by nmarun
    Here’s a question: What happens to the Current property of an IEnumerator before and after the MoveNext() call? When I say ‘after the MoveNext() call’, I mean after MoveNext() returns a false indicating an end of the collection. I was going through the MSDN for IEnumerator.Current and the first paragraph basically boils down to: If MoveNext() method has never been called on an IEnumerator, the Current property is undefined. I wanted to know what ‘undefined’ means – is it null? If so, what if the...(read more)

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  • My apps in the Windows 8 Store

    - by nmarun
    I have four apps in the Windows 8 store now. Logo Name Available since Description Knight’s Tour Nov 7 2012 Game – How many moves you can make with your Knight on a board alternatives To Oct 9 2012 App – Alternatives to a specified software on various platforms with different licenses Cows N Bulls Sept 7 2012 Game – Guess the four-letter word chosen by the computer Howzzat Book Aug 27 2012 App – Get ratings for a book from various sites all in one place...(read more)

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  • Implementing Ads on any page in your Windows 8 XAML app–part 1

    - by nmarun
    Let’s look at how you can implements ads on any page in your win 8 app. Before you get to your application, you need to create Ad Units in the MS Pubcenter site. Once you have set up your account with payout and tax details, go to the Setup tab and you’ll see something like below. There are a few options for the sizes of the ad units as shown on the Pubcenter site. Remember that these screenshots are just to give you some reference. The actual positioning of the ads in your apps is decided by you...(read more)

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  • How can i bring pace to my Learning Graph?

    - by MSU
    I have been learning programming, mostly C# and .net stuff. And i have target to become a fulltime .NET developer. But i am feeling that learning Graph is very slow, i have been learning C# programming, doing some codes everyday, but how i can learn very fast and increase my skills rapidly. I know there should be a balace of coding and reading, as without reading i can't code and without coding i can't increase my skills. SO, I am requesting here suggestiong from experts on how i bring more pace to my learning graph, i intend to give 4-6 hours daily for this and on weekends 10+ hours ..

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  • Gave a talk at SoCal Code Camp at USC today titled “Linq to Objects A-Z”

    - by dotneteer
    I gave a talk at SoCal Code Camp on Linq to Objects. With careful categorization of Linq functions, I was able to cover the entire set of Linq functions in only 35 minutes. I was able to spend the rest time on demos. In my first demo, I show I was able to write a top 20 URL type of query using 4 lines of library code and 9 line of Linq code without tools like Log Parser. I also demonstrated that I only need to change 2 lines of code from querying a single log file to a whole directory of log files. It would be as simple to run the query against multiple servers in parallel. In my second demo, I discussed how to turn into graph depth-first-search (DFS) and breath-first-search (BFS) in the a Linq queryable problem. The class LingToGraph contains the only DFS and BFS code I ever have to write; the rest could be done the the lambda passed to the DFS or BFS calls. In future blogs, I will provide more details explanation of code. Links: Link to Powerpoint slides. Link to demos.

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  • Installing Visual Studio 2010 SP1 or Windows Phone tools in your VM (danger!)

    - by Jeff
    If you've read my blog for any amount of time, you probably know that I tend to develop stuff in a Parallels VM on a Mac. It's how I roll. I like VM's because I can trash them and do really stupid things with beta software. That said, there is a pain point that doesn't seem that well documented when it comes to installing stuff in this scenario.The WP7 tools, and SP1 for Visual Studio 2010 (perhaps only if you already have the WP7 tools installed, I'm not sure), do something strange on install. As if it weren't already a long and slow installation, for reasons I don't understand, the installer fires up an instance of Windows Phone Emulator. As you may already know, the emulator doesn't run in a VM, because it is itself a VM, apparently. What it will do is fire up your CPU, make your comprooder hot and make the fans blow harder.I found this out accidentally, as I started the (slow) phone tool installation once, and walked away. An hour and a half later, I came back to find it hadn't finished. But it was hot and the CPU was pegged, so I fired up the task manager to find XDE.exe, the phone emulator, cranking away. I had to kill it several times, and eventually the install finished. It fired up just once in the SP1 install, but it still had the same hanging effect.I can't for the life of me figure out why it does this. In a VM, I can connect the phone to it and use that, so I don't need the emulator. But this install, firing up the emulator, will make it choke until you kill the XDE.exe process. Watch out!

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  • Facebook C# SDK submitted to the Outercurve Foundation

    - by The Official Microsoft IIS Site
    I am pleased to announce another open source milestone as we continue to deliver on our commitment to Interoperability: today, the Facebook C# SDK was submitted to the Outercurve Foundation’s Data, Languages, and Systems Interoperability gallery. This project is a set of libraries that enables developers of all Microsoft platforms, as well as Mono, to build applications that integrate with Facebook. The project contains core libraries for authentication and calling Facebook APIs. Additionally...(read more)

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  • Getting Started With Knockout.js

    - by Pawan_Mishra
    Client side template binding in web applications is getting popular with every passing day. More and more libraries are coming up with enhanced support for client side binding. jQuery templates is one very popular mechanism for client side template bindings. The idea with client side template binding is simple. Define the html mark-up with appropriate place holder for data. User template engines like jQuery template to bind the data(JSON formatted data) with the previously defined mark-up.In this...(read more)

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  • How can I lower my C# learning curve? [closed]

    - by MSU
    I have been learning programming, mostly C# and .net stuff. And I have target to become a fulltime .NET developer. But I am feeling that learning Graph is very slow, I have been learning C# programming, doing some coding everyday, but how I can learn very fast and increase my skills rapidly? I know there should be a balance of coding and reading, as without reading I can't code and without coding I can't increase my skills. SO, I am requesting here suggesting from experts on how I bring more pace to my learning curve? I intend to give 4-6 hours daily for this and on weekends 10+ hours.

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  • Event handler generation in Visual Studio 2012

    - by Jalpesh P. Vadgama
    This post will be a part of Visual Studio 2012 feature series There are lots of new features there in visual studio 2012. Event handler generation is one of them. In earlier version of visual studio there was no way to create event handler from source view directly.  Now visual studio 2012 have event handler generation functionality. So if you are editing an event view in source view intellisense will display add new event handler template and once you click on it. It will create a new event handler in the cs file. It will also put a eventhandler name against event name so you don’t need to write that. So, let’s take a simple example of button click event so once I write onclick attribute their smart intellisense will pop up . Now once you click on <Create New Event> It will create event handler in .cs file like following. It will also put submitButton_Click on onClick attribute. Hope you liked it. Stay tuned for more. Till then happy programming..

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  • Upgrading a hard disk – To repave or to migrate, that is the question

    - by guybarrette
    I recently changed my laptop hard disk from the stock 250GB 5400 drive to a 320GB 7200 drive.  And no, I didn’t bought a SSD drive because the cost is way too much right now.  At $70, my upgrade was a lot cheaper than a SSD drive.  Maybe next year. When changing a system main hard drive, one must ask himself: To repave or to migrate, that is the question.  I choose to migrate so I went to the Acronis Website to take a look at their product line.  They have a few products that could do the job.  One being Acronis Migrate Easy 7.0 and the other being Acronis True Image Home 2010.  Since True Image was just $10 more then Migrate Easy, I bought True Image. I inserted my new hard drive in a 2.5” USB enclosure, and started the migration process.  Once the data copied, I switched the drives.  The process went very smoothly and without hiccups.  Highly recommended. BTW, Acronis offers free trials so I guess that nothing can stop you from “testing” a migration  ;-) var addthis_pub="guybarrette";

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  • Extension methods on a null object instance – something you did not know

    - by nmarun
    Extension methods gave developers with a lot of bandwidth to do interesting (read ‘cool’) things. But there are a couple of things that we need to be aware of while using these extension methods. I have a StringUtil class that defines two extension methods: 1: public static class StringUtils 2: { 3: public static string Left( this string arg, int leftCharCount) 4: { 5: if (arg == null ) 6: { 7: throw new ArgumentNullException( "arg" ); 8: } 9: return arg.Substring(0, leftCharCount); 10...(read more)

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  • Alert user when their session is about to expire

    - by budugu
    Note: Cross posted from Vijay Kodali's Blog. Permalink Here is a quick and dirty trick to alert users on session timeout. This is not a perfect solution. But it will give reader an idea to work on... Some facts before we start: Session doesn't end When the user closes his browser When the user navigates away from your page When user connection lost. Session ends, when the server hasn't gotten a request from the user in a specific time (Session timeout value)....Permalink

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  • Which license can I use for my open source AWS project [closed]

    - by mafue
    I'm creating a project on codeplex that uses Amazon Web Services and the AWS SDK for .NET Which licenses can I use? The SDK is released under Apache 2.0 license, so I assume my project can or should use the same. If I add another open source library released under a different license, do I need to find a license that is 'compatible' with both ie. one that has the same requirements for derivative works? My requirement is for a license that allows me to publish a derivative work from the AWS .NET SDK. I can use any of the licenses that codeplex supports, which includes: Apache 2.0 GNU GPLv2 MIT Mozilla Public License 2.0 Microsoft Public License

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