Architecture :: Use A C# Class Or A Interface?

Feb 3, 2011

I have a block of SQL statements that I like to use as a sort of function.

I was thinking that I could make a class and inherit all of the master function, then add the parts that I need for other sections of the program in a sub class.

The problem is, up to this point I've been programming ASP .Net through visual studio, and it's kind of just programming behind controls. I'm not sure where to put the class/function/method/interface, or whatever we call it.

Of course you probably know that visual studio creates a bunch of partial classes when you do an ASP. Net application... so.. to get access to a function like object, across classes.. use an Interface?

View 7 Replies


Similar Messages:

Architecture :: Creating Each Class Library Project For Interface?

Jan 11, 2010

weather to create each class libaray project for Interface, Service, Model, DTO, Repository ?

View 1 Replies

Architecture :: Interface, Abstract Or Inheritance?

Oct 7, 2010

I have a table which houses two entities. StaticProgram and DynamicProgram. There is one column in that table called ProgramType which determines if a program is of Type static or Dynamic. Though these two entities are stored in one table (I am guessing because the primitive fields for Static and Dynamic programs are exactly the same) but from a business point of view these are two VERY different entities.

So, I created two Classes StaticProgram and DynamicProgram. However, I donot want to create two seperate Data Access Classes because it is going to be the exact same code replicated twice. I tried creating a "Program" class as base class and inherited StaticProgram and DynamicProgram classes but down casting is not supported so I can't return a "Program" object from the data access class and cast it to "StaticProgram" class.So, what are my options? Can I create an IProgram interface and have StaticProgram and DynamicProgram implement that interface and have my Data Access class return IProgram?

View 1 Replies

Use Abstract Class And Interface Class?

Jan 29, 2010

When to use Abstract class and when to use Interface class.

View 10 Replies

Architecture :: What's The Advantages / Disadvantages Of Explicit Interface Implementation

Jul 19, 2010

I am searching for the advantages and disadvantages of the explicit interface implementation

View 1 Replies

.net - Shorten Syntax When Using Class Interface In C# ?

Jan 23, 2011

I have created a Slider User Control which implements ISlider Interface.I have some methods like SetValue below which should accept both ISlider types and standard Slider control type.Am I'm obliged to use this heavy syntax is there any shortcut?

public void SetValue(Object slider, Double value)
ISlider ISlider;
ISlider = slider as ISlider;
if (ISlider != null)
ISlider.Value = value;
((Slider)slider).Value = value;

View 1 Replies

Set View Properties From Another Class / Interface?

Nov 16, 2010

There is a SearchPage which has a properties ErrorMessage, SuccessMessage etc. This is basically a MVP pattern so for each page(view) there is IView that contains definitions for all the properties

I am using decoratoe pattern to set these peoperties dependingon the message type. There is another Interface IBaseMessage which has a method DisplayMessage() and a class BaseMessage which implements the interface. This class has a definition of the view

Interface IbaseMessage
{
DisplayMessage()
}
baseMessage:IbaseMessage
{
public Iview _view{get; set;}
DisplayMessage()
{
_view.Warning ="<message>"
_view.error="<message>"
}

Here, I am not able to set the message to the view properties. I am getting the error as "Object reference not set to an instance of the object"

View 2 Replies

There Is No Interface Definition Of Rwuser Class?

Mar 5, 2010

I have a Class RWuser(base Class)it has diff methods agent is another class it is inherited the base classit has diff methodsfor the above classes i am writing interface definitions in the constructor of a classthe above in one project and i am creating one more project and add ref of the above to this one when i am calling Child Class(Agent)it giving error like there is no interface definition of rwuser class

[Code]...

View 4 Replies

MVC :: Cannot Create An Instance Of The Abstract Class Or Interface?

Dec 12, 2010

Error 1279 Cannot create an instance of the abstract class or interface 'System.Web.Mvc.FileResult'

[Code]....

I am using MVC 2. The same code works in my onather application. I have no idea about this error.

View 2 Replies

Create A Log Everytime When Methods In An Interface Class Are Called

Dec 30, 2010

I want to update a log file(txt) everytime when methods in a an interface class are called? Is there any way to do this other than writing code in every method to create log?

View 3 Replies

Expected Class, Delegate, Enum, Interface, Or Struct?

May 19, 2010

I am getting this build error on the following line of code, and do not find anyhting wrong there.

public partial class _Default : System.Web.UI.Page
{
}

[code]...

View 3 Replies

C# - Does Every User Defined Class Needs To Implement IDisposable Interface To Get Garbage Collected?

Aug 6, 2010

I am not sure how the user defined class objects are garbage collected. Do I need to implement IDisposable interface on every class and call the dispose() method on it to free the memory?

View 7 Replies

How To Make A Class Recognize That An Interface Found In A Separate File Exists

Mar 8, 2010

I've made an interface called ApprovalEvent in a separate file with the namespace myproject... I've also made a class called PurchaseOrder... it's also in the same namespace, just in a separate file. Whenever I try to make PurchaseOrder implement ApprovalEvent it always says that ApprovalEvent is undefined...

How can I make the class recognize that the interface exists but is in a different file?

Here's some code:

[Code]....

View 1 Replies

Alternative For Static Method In Interface - Enforce Implementing Class-level Methods

Oct 28, 2010

I have a hierarchy in my website project as below:

[CustomControl1 - folder]
- CustomControl1.ascx
- CustomControl1.css
- CustomControl1.js

I load css and js files dynamicaly based on which controls are used on particular page. I am doing it by using following code:

[code]....

where AddLinks method adds HtmlLink controls to Page.Header with href attribute set to coresponding css and/or js file.

I would like to add Interface that would force new controls to have AddLinks method but it is impossible since it is a static method. Because my custom controls inherit from Control class I cannot use abstract class and/or virtual methods either. How can I achieve my goal?

View 1 Replies

Web Forms :: Error In Form--expected Class, Delegate, Enum, Interface, Or Struct?

Aug 11, 2010

I am getting the same error (as this post: http://forums.asp.net/p/1346731/4020966.aspx) as expected class,delegate,enum,interface or struct and also type or namespace definition or end of file expected.Below is the code:

public
partial
class

[code]...

View 1 Replies

Architecture :: Handling Asynchronous Server To Server Interface?

Mar 11, 2010

So this interface allows one server to request data from another server. The catch is that all xml for the interface is transmitted entirely over http posts followed by an empty status code 200 response. No data is sent in a response. So if my application wants to requests data, we send an http post with the xml request and receive a blank 200. Then, shortly after our request, we'll receive an http post to a predetermined URL with the xml data which we then send a blank 200. This data will then be stored in a SQL database. This interface cannot be altered.

The reason this is problematic is because our server is handling requests from clients that need that data in the response. If a user requests for data that isn't available in our database, it needs to be requested from the interface and then returned in the response. I'm just not sure how to get this to work out. I've thought about polling the database, but I'm worried about thread pool issues. I've also looked into using ManualResetEvent.WaitOne to halt the processing of the client request and then calling Set when the interface sends the data (as a request). I've read that wait threads are shared, but just don't know if this will scale well. Does anyone have any insight or I'm pretty much stumped on this one...

View 4 Replies

Custom Server Controls :: Implementing An Interface From A Class Library In A Custom Control?

Jul 8, 2010

I'm building an n-tier application, with the web client and the class library separate. I'm also using the factory pattern of development, using interfaces to act as containers for different objects they are associated with. The problem I'm expreriencing is that I declared a public interface class in the class library and I can create an instance of it in in my aspx pages but whenever I declare it in my custom control code-side, i get an error, like so:

Error 20 The type or namespace name 'IContentMaker' could not be found (are you missing a using directive or an assembly reference?)

notge that I have inherited the class library namespace using the 'using' keyword just in case you are wondering. My code is like so:

using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using TQO_Classes ; //importing the class library project
public partial class PageContentMgr : System.Web.UI.UserControl
{
private IContentMaker _data; //this line throws the error, it works fine on aspx pages

View 1 Replies

Architecture :: How To Make The Class Libraries

Jan 22, 2010

Task is to develop class libraries that can be re-use in projects but assambies should be copy righted. By this I mean developer will not give the code of class libraries to the clients yet they will provide the code of there sites/ applications, these libraries will be used just as internal development libraries. I want to make Business Logic Layer, DAL, Business Objects as class libraries

Q1. How I can control unathorised use of libraries ?

Q2. How to make assamlies non extendable ?

Q3. What security measurs I should take on this.

View 6 Replies

Architecture :: Key, Value Pairs Implementation In Class?

Feb 16, 2010

In a project im working on there are many sql tables containing different ID, Name pairs. Those are represented as Enums in classes that need them however that requires casting since tables contain ID only.Also when serialize the Enum contains the ID not value.

View 3 Replies

Architecture :: What Is The Function Of Abstract Class

Oct 24, 2010

what is the function of abstract class, why design pattern need to build BLL and DAL

anyone give an example for my reference as I am getting strat to build my web-based project

View 3 Replies

Architecture :: Creating A DB Connection In My DAL Class File?

Feb 17, 2010

Below is my class file.

[Code]....

View 1 Replies

Architecture :: Singleton Pattern And Abstract Class?

Aug 19, 2010

I know what Singleton Pattern means and Abstract class means.What I wanted to know was how would this apply to real world.Could anyone give me any good example or simple explanation.Say I have a simple website, why would I use any of the above if any.Why would it simplify my architechture.

View 3 Replies

Architecture :: Advantage Of Singleton Class Over Static?

Mar 30, 2010

See in below I have writtine a

1. Singleton class Emp1 with Display Method and
2. Static Class with Static Method Display.

What is the advantage of singleton class over Static Class with Static members?

[Code]....

View 9 Replies

Architecture :: Singleton Class Could Be Inherited And Derived?

Oct 25, 2010

Just wanted to know if a singleton class could be inherited and derived.

View 2 Replies

Architecture :: Design A Class For Product Searching?

Oct 21, 2010

I'm refactoring an old website that has product search code littered throught the codebehind. I'm trying to encapsulate the search logic into its own class so I've created a Product class with a Search() method. I would like some suggestions about OO best practices so that the class is reusable and maintainable. The questions I have are:

- Should I make the search() method an instance method or make it static? For now the class is just really there to encapsulate my search logic

- If I make it an instance method should it return a list of products or should it populate a member property that I can access like p.Search(); var x = p.ProductList;

- The search method requires upward of 7 parameters of different types, what's the best way to provide them?
- pass them all i.e. p.Search (param1, param2, ..., param7)
- create a SearchParams structure in the class, populate it and pass that i.e. p.Search(searchParams)
- Instantiate a Product object and set properties on it that are used by the Search method i.e. p.ID = 123; etc.... p.Search();

I've used variations of the above before but would like to know what's the best way.

View 1 Replies







Copyrights 2005-15 www.BigResource.com, All rights reserved