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  • Implementing the MVC Design Pattern in ASP.NET...

    Design patterns can help solve complex design problems if they are properly used. The main advantage of using the Model-View-Control (MVC) pattern is decoupling the business and the presentation layers....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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  • Implementing the MVC Design Pattern in ASP.NET...

    Design patterns can help solve complex design problems if they are properly used. The main advantage of using the Model-View-Control (MVC) pattern is decoupling the business and the presentation layers....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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  • Graphic Design for Impressive Website Look

    Graphic design can be a boon for your website or curse if done wrongly. Visual pleasure is the strongest asset and quality of any website which makes them a visitor attracting medium. No matter how g... [Author: Alan Smith - Web Design and Development - May 13, 2010]

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  • Importance of Corporate Logo Design

    You need to bind to certain basic principles that ensure that corporate logo design is professional and easy to remember and creates a great impact on viewers while successfully expressing the nature... [Author: Alan Smith - Web Design and Development - May 13, 2010]

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  • Alternatives to the Singleton Design Pattern

    The Singleton Design Pattern is one of the simplest and most widely known design patterns in use in software development. However, despite its simplicity, it is very easy to get wrong and the consequences of its use even when properly implemented can outweigh its benefits. It turns out there are other ways to achieve the goals of the Singleton pattern which will often prove to be simpler, safer, and more maintainable.

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  • Keeping the meshes "thickness" the same when scaling an object

    - by user1806687
    I've been bashing my head for the past couple of weeks trying to find a way to help me accomplish, on first look very easy task. So, I got this one object currently made out of 5 cuboids (2 sides, 1 top, 1 bottom, 1 back), this is just for an example, later on there will be whole range of different set ups. Now, the thing is when the user chooses to scale the whole object this is what should happen: X scale: top and bottom cuboids should get scaled by a scale factor, sides should get moved so they are positioned just like they were before(in this case at both ends of top and bottom cuboids), back should get scaled so it fits like before(if I simply scale it by a scale factor it will leave gaps on each side). Y scale: sides should get scaled by a scale factor, top and bottom cuboid should get moved, and back should also get scaled. Z scale: sides, top and bottom cuboids should get scaled, back should get moved. Hope you can help, EDIT: So, I've decided to explain the situation once more, this time more detailed(hopefully). I've also made some pictures of how the scaling should look like, where is the problem and the wrong way of scaling. I this example I will be using a thick walled box, with one face missing, where each wall is made by a cuboid(but later on there will be diffrent shapes of objects, where a one of the face might be roundish, or triangle or even under some angle), scaling will be 2x on X axis. 1.This is how the default object without any scaling applied looks like: http://img856.imageshack.us/img856/4293/defaulttz.png 2.If I scale the whole object(all of the meshes) by some scale factor, the problem becomes that the "thickness" of the object walls also change(which I do not want): http://img822.imageshack.us/img822/9073/wrongwaytoscale.png 3.This is how the correct scaling should look like. Appropriate faces gets caled in this case where the scale is on X axis(top, bottom, back): http://imageshack.us/photo/my-images/163/rightwayxscale1.png/ 4.But the scale factor might not be the same for all object all of the times. In this case the back has to get scaled a bit more or it leaves gaps: http://imageshack.us/photo/my-images/9/problemwhenscaling.png/ 5.If everything goes well this is how the final object should look like: http://imageshack.us/photo/my-images/856/rightwayxscale2.png/ So, as you have might noticed there are quite a bit of things to look out when scaling. I am asking you, if any of you have any idea on how to accomplish this scaling. I have tried whole bunch of things, from scaling all of the object by the same scale factor, to subtracting and adding sizes to get the right size. But nothing I tried worked, if one mesh got scaled correctly then others didnt. Donwload the example object. English is not my first language, so I am really sorry if its hard to understand what I am saying.

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  • Revamp Websites With Custom Design

    The concept of web design encompasses the task of developing hypertext or hypermedia content which a user can access through the World Wide Web. Through web design websites are created. The concept entails more on designing rather than development, i.e. taking care of the graphic elements, look and feel and other aesthetic feature. It is different from professional web development which often concentrates on the technical aspect of the website.

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  • Web Design Before The Style Sheet Language

    In today';s trends of website design, the use of style sheet languages such as CSS (Cascading Style Sheets) and XSL (Extensible StyleSheet Languages) are considered necessary to build a successful web... [Author: Margarette Mcbride - Web Design and Development - May 17, 2010]

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  • Web Design in Today's Economy

    Web Design in today's Economy In today's economy businesses are looking for cheaper ways to get their Web Design and Web Development needs met. This is not necessarily a bad thing, however with web sites you get what you pay for.

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  • CSS In The World Of Website Design

    Style sheet languages are computer languages which have now been heavily used in the Internet. It was introduced in the industry of website design when people sought many ways on how to avoid the use... [Author: Margarette Mcbride - Web Design and Development - May 06, 2010]

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  • SEO Web Design - A Worthwhile Investment?

    The last decade has seen an increased focus on SEO and SEO web design. With SEO a popular 'buzz' word amongst businesses of many different sizes some people may have begun to ask themselves how they could benefit from SEO web design.

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  • The Rise Of CSS In Web Design

    Style sheet languages were introduced in the market because of their capability to reduce the problems which are usually associated with the use of tables in website design. One of the most popular s... [Author: Margarette Mcbride - Web Design and Development - May 04, 2010]

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  • Factory pattern vs ease-of-use?

    - by Curtis White
    Background, I am extending the ASP.NET Membership with custom classes and extra tables. The ASP.NET MembershipUser has a protected constructor and a public method to read the data from the database. I have extended the database structure with custom tables and associated classes. Instead of using a static method to create a new member, as in the original API: I allow the code to instantiate a simple object and fill the data because there are several entities. Original Pattern #1 Protected constructor > static CreateUser(string mydata, string, mydata, ...) > User.Data = mydata; > User.Update() My Preferred Pattern #2 Public constructor > newUser = new MembershipUser(); > newUser.data = ... > newUser.ComplextObject.Data = ... > newUser.Insert() > newUser.Load(string key) I find pattern #2 to be easier and more natural to use. But method #1 is more atomic and ensured to contain proper data. I'd like to hear any opinions on pros/cons. The problem in my mind is that I prefer a simple CRUD/object but I am, also, trying to utilize the underlying API. These methods do not match completely. For example, the API has methods, like UnlockUser() and a readonly property for the IsLockedOut

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  • Uncaught TypeError: Object #<an Object> has no method 'fullCalendar'

    - by Lalit
    Hi, I have embed the fullcalender control in my asp.net mvc application. It is running fine locally. but when I uploads it to my domain server (third party) it showing me This Error: Uncaught TypeError: Object # has no method 'fullCalendar' in crome console (debugger). and not rendering the control. ** EDITED: My HTML code is this ** <%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage" % Index <% var serializer = new System.Web.Script.Serialization.JavaScriptSerializer(); % < style type='text/css' body { margin-top: 40px; text-align: center; font-size: 14px; font-family: "Lucida Grande",Helvetica,Arial,Verdana,sans-serif; } #calendar { width: 900px; margin: 0 auto; } < script type="text/javascript" $(document).ready(function() { var date = new Date(); var d = date.getDate(); var m = date.getMonth(); var y = date.getFullYear(); var officerid = document.getElementById('officerid').value; url = "/TasksToOfficer/Calender/" + officerid; var currenteventIden = <%= serializer.Serialize( ViewData["iden"] ) %> var calendar = $('#calendar').fullCalendar({ header: { left: 'prev,next today', center: 'title', right: 'month,agendaWeek,agendaDay', border: 0 }, eventClick: function(event, element) { var title = prompt('Event Title:', event.title, { buttons: { Ok: true, Cancel: false} }); var iden = event.id; if (title) { var st = event.start; var ed = event.end; var aldy = event.allDay; var dt = event.date; event.title = title; calendar.fullCalendar('updateEvent',event); var date = new Date(st); var NextMonth = date.getMonth() + 1; var dateString = (date.getDate()) + '/' + NextMonth + '/' + date.getFullYear(); var QueryStringForEdit=null; QueryStringForEdit="officerid=" + officerid + "&description=" + title + "&date=" + dateString + "&IsForUpdate=true&iden=" + iden; if (officerid) { $.ajax( { type: "POST", url: "/TasksToOfficer/Create", data: QueryStringForEdit, success: function(result) { if (result.success) $("#feedback input").attr("value", ""); // clear all the input fields on success }, error: function(req, status, error) { } }); } } }, selectable: true, selectHelper: true, select: function(start, end, allDay) { var title = prompt('Event Title:', { buttons: { Ok: true, Cancel: false } } ); if (title) { calendar.fullCalendar('renderEvent', { title: title, start: start, end: end, allDay: allDay }, false); // This is false , because do not show same event on same date after render from server side. var date = new Date(start); var NextMonth = date.getMonth() + 1; // Reason: it is bacause of month array it starts from 0 var dateString = (date.getDate()) + '/' + NextMonth + '/' + date.getFullYear(); if (officerid) { $.ajax({ type: "POST", url: "/TasksToOfficer/Create", data: "officerid=" + officerid + "&description=" + title + "&date=" + dateString + "&IsForUpdate=false", success: function(result) { if (result.success) $("#feedback input").attr("value", ""); //$("#feedback_status").slideDown(250).text(result.message); }, error: function(req, status, error) { } }); } } calendar.fullCalendar('unselect'); }, editable: true, events: url }); }); //--------------------------------------------------------------------------// </script > <h2> Index</h2> <div id="calendar"> </div> <input id="officerid" type="hidden" value="<%=ViewData["officerid"].ToString()%>" />

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  • Is It Incorrect to Make Domain Objects Aware of The Data Access Layer?

    - by Noah Goodrich
    I am currently working on rewriting an application to use Data Mappers that completely abstract the database from the Domain layer. However, I am now wondering which is the better approach to handling relationships between Domain objects: Call the necessary find() method from the related data mapper directly within the domain object Write the relationship logic into the native data mapper (which is what the examples tend to do in PoEAA) and then call the native data mapper function within the domain object. Either it seems to me that in order to preserve the 'Fat Model, Skinny Controller' mantra, the domain objects have to be aware of the data mappers (whether it be their own or that they have access to the other mappers in the system). Additionally it seems that Option 2 unnecessarily complicates the data access layer as it creates table access logic across multiple data mappers instead of confining it to a single data mapper. So, is it incorrect to make the domain objects aware of the related data mappers and to call data mapper functions directly from the domain objects? Update: These are the only two solutions that I can envision to handle the issue of relations between domain objects. Any example showing a better method would be welcome.

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  • Parametrized Strategy Pattern

    - by ott
    I have several Java classes which implement the strategy pattern. Each class has variable number parameters of different types: interface Strategy { public data execute(data); } class StrategyA implements Strategy { public data execute(data); } class StrategyB implements Strategy { public StrategyB(int paramA, int paramB); public data execute(data); } class StrategyB implements Strategy { public StrategyB(int paramA, String paramB, double paramC); public data execute(data); } Now I want that the user can enter the parameters in some kind of UI. The UI should be chosen at runtime, i.e. the strategies should be independent of it. The parameter dialog should not be monolithic and there should be the possibility to make it behave and look different for each strategy and UI (e.g. console or Swing). How would you solve this problem?

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  • Difference between Singleton implemention using pointer and using static object

    - by Anon
    EDIT: Sorry my question was not clear, why do books/articles prefer implementation#1 over implementation#2? What is the actual advantage of using pointer in implementation of Singleton class vs using a static object? Why do most books prefer this class Singleton { private: static Singleton *p_inst; Singleton(); public: static Singleton * instance() { if (!p_inst) { p_inst = new Singleton(); } return p_inst; } }; over this class Singleton { public: static Singleton& Instance() { static Singleton inst; return inst; } protected: Singleton(); // Prevent construction Singleton(const Singleton&); // Prevent construction by copying Singleton& operator=(const Singleton&); // Prevent assignment ~Singleton(); // Prevent unwanted destruction };

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  • Modeling a Generic Relationship in a Database

    - by StevenH
    This is most likely one for all you sexy DBAs out there: How would I effieciently model a relational database whereby I have a field in an "Event" table which defines a "SportType". This "SportsType" field can hold a link to different sports tables E.g. "FootballEvent", "RubgyEvent", "CricketEvent" and "F1 Event". Each of these Sports tables have different fields specific to that sport. My goal is to be able to genericly add sports types in the future as required, yet hold sport specific event data (fields) as part of my Event Entity. Is it possible to use an ORM such as NHibernate / Entity framework which would reflect such a relationship? I have thrown together a quick C# example to express my intent at a higher level: public class Event<T> where T : new() { public T Fields { get; set; } public Event() { EventType = new T(); } } public class FootballEvent { public Team CompetitorA { get; set; } public Team CompetitorB { get; set; } } public class TennisEvent { public Player CompetitorA { get; set; } public Player CompetitorB { get; set; } } public class F1RacingEvent { public List<Player> Drivers { get; set; } public List<Team> Teams { get; set; } } public class Team { public IEnumerable<Player> Squad { get; set; } } public class Player { public string Name { get; set; } public DateTime DOB { get; set;} }

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  • Example with Visitor Pattern

    - by devoured elysium
    public class Song { public string Genre { get; protected set; } public string Name { get; protected set; } public string Band { get; protected set; } public Song(string name, string band, string genre) { Name = name; Genre = genre; Band = band; } } public interface IMusicVisistor { void Visit(List<Song> items); } public class MusicLibrary { List<Song> _songs = new List<Song> { ...songs ... }; public void Accept(IMusicVisitor visitor) { visitor.Visit(_songs); } } and now here's one Visitor I made: public class RockMusicVisitor : IMusicVisitor { public List<Song> Songs { get; protected set; } public void Visit(List<Song> items) { Songs = items.Where(x => x.Genre == "Rock").ToList(); } } Why is this any better than just putting a public property Songs and then letting any kind of class do with it anything that it wants to? This example comes from this post.

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  • Entity framework (1): implement 1 foreign key to multiple tables

    - by Michel
    Hi, i've modeled this: i have an import table, and an import steps table import 1 .. N importsteps Now i have a table importparams, which hold key/value pairs to register all kind of info about the import or the importsteps. So i have modeled a FK in SqlServer which points to the PK of the import table and to the PK of the importsteps table (the ID's for both the import as the importsteps table are guids, so i can query the importparams with either the id from import or from importsteps and get the right importparams). Makes sense a bit? But how can i model this in the EF? I can see it's a bit hard for the EF to model this, because one realtion can point to multiple classes, but is there a way? The workaround normally is just to get all importparams where FK is the ID, but as you know the FK is not available in the EF version 1. I hope you can help me out, michel

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  • Designing a state machine in C++

    - by skyeagle
    I have a little problem that involves modelling a state machine. I have managed to do a little bit of knowledge engineering and 'reverse engineer' a set of primitive deterministic rules that determine state as well as state transitions. I would like to know what the best practises are regarding: How to rigorously test my states and state transitions to make sure that the system cannot end up in an undeetermined state. How to enforce state transition requirements (for example, it should be impossible to go directly from stateFoo to StateFooBar, i.e. to embue each state with 'knowlege' about the states it can transition to. Ideally, I would like to use clean, pattern based design, with templates wherever possible. I do need somewhere to start though and I would be grateful for any pointers (no pun intended), that are sent my way.

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  • Modeling a Generic Relationship (expressed in C#) in a Database

    - by StevenH
    This is most likely one for all you sexy DBAs out there: How would I effieciently model a relational database whereby I have a field in an "Event" table which defines a "SportType"? This "SportsType" field can hold a link to different sports tables E.g. "FootballEvent", "RubgyEvent", "CricketEvent" and "F1 Event". Each of these Sports tables have different fields specific to that sport. My goal is to be able to genericly add sports types in the future as required, yet hold sport specific event data (fields) as part of my Event Entity. Is it possible to use an ORM such as NHibernate / Entity framework / DataObjects.NET which would reflect such a relationship? I have thrown together a quick C# example to express my intent at a higher level: public class Event<T> where T : new() { public T Fields { get; set; } public Event() { EventType = new T(); } } public class FootballEvent { public Team CompetitorA { get; set; } public Team CompetitorB { get; set; } } public class TennisEvent { public Player CompetitorA { get; set; } public Player CompetitorB { get; set; } } public class F1RacingEvent { public List<Player> Drivers { get; set; } public List<Team> Teams { get; set; } } public class Team { public IEnumerable<Player> Squad { get; set; } } public class Player { public string Name { get; set; } public DateTime DOB { get; set;} }

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