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  • How to get around the Circular Reference issue with JSON and Entity

    - by DanScan
    I have been experimenting with creating a website that leverages MVC with JSON for my presentation layer and Entity framework for data model/database. My Issue comes into play with serializing my Model objects into JSON. I am using the code first method to create my database. When doing the code first method a one to many relationship (parent/child) requires the child to have a reference back to the parent. (Example code my be a typo but you get the picture) class parent { public List<child> Children{get;set;} public int Id{get;set;} } class child { public int ParentId{get;set;} [ForeignKey("ParentId")] public parent MyParent{get;set;} public string name{get;set;} } When returning a "parent" object via a JsonResult a circular reference error is thrown because "child" has a property of class parent. I have tried the ScriptIgnore attribute but I lose the ability to look at the child objects. I will need to display information in a parent child view at some point. I have tried to make base classes for both parent and child that do not have a circular reference. Unfortunately when I attempt to send the baseParent and baseChild these are read by the JSON Parser as their derived classes (I am pretty sure this concept is escaping me). Base.baseParent basep = (Base.baseParent)parent; return Json(basep, JsonRequestBehavior.AllowGet); The one solution I have come up with is to create "View" Models. I create simple versions of the database models that do not include the reference to the parent class. These view models each have method to return the Database Version and a constructor that takes the database model as a parameter (viewmodel.name = databasemodel.name). This method seems forced although it works. NOTE:I am posting here because I think this is more discussion worthy. I could leverage a different design pattern to over come this issue or it could be as simple as using a different attribute on my model. In my searching I have not seen a good method to overcome this problem. My end goal would be to have a nice MVC application that heavily leverages JSON for communicating with the server and displaying data. While maintaining a consistant model across layers (or as best as I can come up with).

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  • correct pattern to handle a lot of entities in a game

    - by lezebulon
    In my game I usually have every NPC / items etc being derived from a base class "entity". Then they all basically have a virtual method called "update" that I would class for each entity in my game at every frame. I am assuming that this is a pattern that has a lot of downsides. What are some other ways to manage different "game objects" throughout the game? Are there other well-known patterns for this? My game is a RPG if that changes anything

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  • C# 4.0 New Features

    New features on c# 4.0 1. Dynamic Typed Objects 2. Optional and Named Parameters 3. Improved COM Interoperability 4. Co- and Contra-Variance

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  • SQL 2012 - MySemanticSearch Demo with Tag Clouds

    - by sqlartist
    Excellent demonstration of the new SQL Server 2012 Semantic Search feature available at http://mysemanticsearch.codeplex.com Just tried it out on a large Business Intelligence related Microsoft Word collection and also the health related DMOZ collection of html files discussed in my previous posts. I have included some screenshots below of each document collection. I have realised that the Tag Cloud may need to be a bit more configurable based on the results of any search term. Business Intelligence...(read more)

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  • Latest Fusion DOO White Paper - Overcoming Order Management Complexity in Global Organizations

    - by Pam Petropoulos
    Check out this latest Fusion Distributed Order Orchestration white paper entitled “Overcoming Order Management Complexity in Global Organizations”.  Discover how Oracle Fusion DOO enables large, complex organizations to streamline their order management processes and take advantage of lower costs, higher margins, and improved customer service. Click here to read the whitepaper.

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  • Separating logic and data in browser game

    - by Tesserex
    I've been thinking this over for days and I'm still not sure what to do. I'm trying to refactor a combat system in PHP (...sorry.) Here's what exists so far: There are two (so far) types of entities that can participate in combat. Let's just call them players and NPCs. Their data is already written pretty well. When involved in combat, these entities are wrapped with another object in the DB called a Combatant, which gives them information about the particular fight. They can be involved in multiple combats at once. I'm trying to write the logic engine for combat by having combatants injected into it. I want to be able to mock everything for testing. In order to separate logic and data, I want to have two interfaces / base classes, one being ICombatantData and the other ICombatantLogic. The two implementers of data will be one for the real objects stored in the database, and the other for my mock objects. I'm now running into uncertainties with designing the logic side of things. I can have one implementer for each of players and NPCs, but then I have an issue. A combatant needs to be able to return the entity that it wraps. Should this getter method be part of logic or data? I feel strongly that it should be in data, because the logic part is used for executing combat, and won't be available if someone is just looking up information about an upcoming fight. But the data classes only separate mock from DB, not player from NPC. If I try having two child classes of the DB data implementer, one for each entity type, then how do I architect that while keeping my mocks in the loop? Do I need some third interface like IEntityProvider that I inject into the data classes? Also with some of the ideas I've been considering, I feel like I'll have to put checks in place to make sure you don't mismatch things, like making the logic for an NPC accidentally wrap the data for a player. Does that make any sense? Is that a situation that would even be possible if the architecture is correct, or would the right design prohibit that completely so I don't need to check for it? If someone could help me just layout a class diagram or something for this it would help me a lot. Thanks. edit Also useful to note, the mock data class doesn't really need the Entity, since I'll just be specifying all the parameters like combat stats directly instead. So maybe that will affect the correct design.

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  • How to construct a build server if unable to build in one step in Delphi XE2 [migrated]

    - by Peter Turner
    There is a known bug in the last few versions of Delphi that causes memory leaks when compiling large projects and I don't think it has a work around, if it does I'd like to know. But, if this is just a problem that has no solution, how would one go about designing a build server for a this? I might need to have the build server restart itself between building and pick up where it left off, that seems cumbersome...

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  • What's on Azure right now?

    - by RobbieT
    If you speak to Microsoft, they'll give you a number of active accounts, but what are those accounts actually running? It could be a collection of Hello World ASP.NET sites, or perhaps small exciting web start-ups, or maybe even the beginnings of large corporate moves to the cloud! I guess what I really wanted to know was who is using Azure but that's a much harder question to answer, so we'll stick to what for now. My super awesome comrade Theo Spears attempted to answer this by trawling every...(read more)

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  • Conférence virtuelle Helios In Action à l'occasion de la sortie annuelle d'une version majeure d'Ecl

    Citation: On June 24, the Eclipse Foundation is presenting Helios In Action - a virtual conference where you can interact with project leads involved in the release and see demos of the new features. The annual simultaneous release has now grown to 39 projects with over 33 million lines of code, contributed by committers around the world. With such a large global community, Eclipse wants to bring Helios to you! Bonjour, La fondation Eclipse a planifié, comme l'an passé, une conférence virtuelle sous le nom de...

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  • Could I be going crazy with Event Handlers? Am I going the "wrong way" with my design?

    - by sensae
    I guess I've decided that I really like event handlers. I may be suffering a bit from analysis paralysis, but I'm concerned about making my design unwieldy or running into some other unforeseen consequence to my design decisions. My game engine currently does basic sprite-based rendering with a panning overhead camera. My design looks a bit like this: SceneHandler Contains a list of classes that implement the SceneListener interface (currently only Sprites). Calls render() once per tick, and sends onCameraUpdate(); messages to SceneListeners. InputHandler Polls the input once per tick, and sends a simple "onKeyPressed" message to InputListeners. I have a Camera InputListener which holds a SceneHandler instance and triggers updateCamera(); events based on what the input is. AgentHandler Calls default actions on any Agents (AI) once per tick, and will check a stack for any new events that are registered, dispatching them to specific Agents as needed. So I have basic sprite objects that can move around a scene and use rudimentary steering behaviors to travel. I've gotten onto collision detection, and this is where I'm not sure the direction my design is going is good. Is it a good practice to have many, small event handlers? I imagine going the way I am that I'd have to implement some kind of CollisionHandler. Would I be better off with a more consolidated EntityHandler which handles AI, collision updates, and other entity interactions in one class? Or will I be fine just implementing many different event handling subsystems which pass messages to each other based on what kind of event it is? Should I write an EntityHandler which is simply responsible for coordinating all these sub event handlers? I realize in some cases, such as my InputHandler and SceneHandler, those are very specific types of events. A large portion of my game code won't care about input, and a large portion won't care about updates that happen purely in the rendering of the scene. Thus I feel my isolation of those systems is justified. However, I'm asking this question specifically approaching game logic type events.

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  • FTP Logon Restrictions in IIS 8

    - by The Official Microsoft IIS Site
    One of the biggest asks from our customers over the years was to provide a way to prevent brute-force password attacks on the FTP service. On several of the FTP sites that I host, I used to see a large number of fraudulent logon requests from hackers that were trying to guess a username/password combination. My first step in trying to prevent these kinds of attacks, like most good administrators, was to implement strong password requirements and password lockout policies. This was a good first step...(read more)

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  • How Linux Saved A Fast Food Giant

    <b>Holy Crap My Hair is on Fire:</b> "Linux saved me and the company I sub contract to, a large fast food giant, from near-total disaster. Last month McAfee posted a virus definition update that flagged SVCHOST.EXE as a virus. This is my story of what happened."

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  • Event sourcing and persistence

    - by jgauffin
    I'm reading up on event sourcing and have a question regarding persistence. I can still have a DB with all entities, right? Or should the events be replayed every time the application is started to get the latest version of each entity in the memory? Seems like a waste on larger systems (as in large amount of data)? The point with event sourcing is that I can can replay the events to populate a data store if required? (or analyze the data)

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  • Why ASP.NET MVC is Preferable Today

    The marvelous technology inception from Microsoft, ASP.NET has for the past few years conquered the favoritism of a large section of the web application development community owing to its maturity and stability. The passage of time has rendered the ASP.NET not obsolete but a little behind the times maybe.

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  • Experiments in Big Data Visualization on Maps

    Experiments in Big Data Visualization on Maps Brendan Kenny and Mano Marks continue their series on using the CanvasLayer library and HTML5 APIs to visualize large amounts of data on top of Google maps. This week they look at loading Shapefiles and KML directly in the browser and using WebGL to render their content over a map. From: GoogleDevelopers Views: 0 1 ratings Time: 00:00 More in Science & Technology

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  • The Internet – Then and Now (1996 versus 2011) [Infographic]

    - by Asian Angel
    Use the link below to view the entire infographic. Keep in mind that it may take a few moments for it to load due to its large size. True Hollywood Story: Bipeds and the World Wide Web [infographic] [via TinyHacker] 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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  • ubuntu image size 732 mb - too big for cd

    - by memius
    i have an old pc that can't handle a boot stick install, so i have to create an actual, old fashioned boot cd. however, the image size for ubuntu 12.04 is 732mb, which is too large for cds, which can hold only 700mb. the maintainers of ubuntu 12.04 say the image size will never go over 700mb, and indeed, the download size seemed to be 689mb. Brasero says it won't burn the cd because the file is too big what's going on?

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  • LXR plugin for Trac for custom C++ based projects

    - by user1542093
    I am currently trying to look at the possibility of an LXR or LXR type extension for Trac for cross referencing and indexing of large C++ projects. I had been looking at what LXR had been doing with the Linux kernel source code and was fascinated by the cross referencing and the amount of detail offered. Is there a way I could set up such an LXR system for my own C++ based source code, preferably using trac.

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  • À la découverte d'ASP.NET Web API, un article de Hinault Romaric

    Bonjour, Je suis heureux de vous annoncer la publication de mon nouvel article qui présente ASP.NET Web API, la nouveauté sans doute la plus passionnante d'ASP.NET MVC 4. Citation: Au vu des besoins d'interaction de plus en plus croissants entre une application Web et un ensemble très large de clients (réseaux sociaux, navigateurs, terminaux mobiles, applications natives, etc.), il était indispensable de fournir aux développeurs un moyen de communiquer dans leurs applications avec ces différents types de clients. Web AP...

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  • What is the recommended library for using Lua from C++?

    - by DevilWithin
    I am currently planning how to integrate Lua scripting in my 2D Game Engine, and i would like to go straight to the most adequate solution for having C++ classes and objects exposed. I've read this (if it helps you help): http://lua-users.org/wiki/BindingCodeToLua If you have a better scripting language to recomend, go for it ;D All help is welcome, i need to pickup the best solution to start implementing Thanks

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  • Evolving Architectures Part II but Design is emergent

    This is part II of a series on agile architecture. You can read part I here.In the previous installment I provided a definition for software architecture and raised the apparent friction between the up front design implied by software architecture and the YAGNI approach and deferred requirements prompted by agile development in the large. This [...]...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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  • MySQL Workbench 6.2.1 BETA has been released

    - by user12602715
    The MySQL Workbench team is announcing availability of the first beta release of its upcoming major product update, MySQL  Workbench 6.2. MySQL Workbench 6.2 focuses on support for innovations released in MySQL 5.6 and MySQL 5.7 DMR (Development Release) as well as MySQL Fabric 1.5, with features such as: A new spatial data viewer, allowing graphical views of result sets containing GEOMETRY data and taking advantage of the new GIS capabilities in MySQL 5.7. Support for new MySQL 5.7.4 SQL syntax and configuration options. Metadata Locks View shows the locks connections are blocked or waiting on. MySQL Fabric cluster connectivity - Browsing, view status, and connect to any MySQL instance in a Fabric Cluster. MS Access migration Wizard - easily move to MySQL Databases. Other significant usability improvements were made, aiming to raise productivity for advanced and new users: Direct shortcut buttons to commonly used features in the schema tree. Improved results handling. Columns have better auto-sizing and their widths are saved. Fonts can also be customized. Results "pinned" to persist viewing data. A convenient Run SQL Script command to directly execute SQL scripts, without loading them first. Database Modeling has been updated to allow changes to the formatting of note objects and attached SQL scripts can now be included in forward engineering and synchronization scripts. Integrated Visual Explain within the result set panel. Visual Explain drill down for large to very large explain plans. Shared SQL snippets in the SQL Editor, allowing multiple users to share SQL code by storing it within a MySQL instance. And much more. The list of provided binaries was updated and MySQL Workbench binaries now available for: Windows 7 or newer Mac OS X Lion or newer Ubuntu 12.04 LTS and Ubuntu 14.04 Fedora 20 Oracle Linux 6.5 Oracle Linux 7 Sources for building in other Linux distributions For the full list of changes in this revision, visit http://dev.mysql.com/doc/relnotes/workbench/en/changes-6-2.html For discussion, join the MySQL Workbench Forums: http://forums.mysql.com/index.php?151 Download MySQL Workbench 6.2.1 now, for Windows, Mac OS X 10.7+, Oracle Linux 6 and 7, Fedora 20, Ubuntu 12.04 and Ubuntu 14.04 or sources, from: http://dev.mysql.com/downloads/tools/workbench/ On behalf of the MySQL Workbench and the MySQL/ORACLE RE Team.

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