In other applications, you don't care about exact results, but you are interested in having an answer that is correct to a certain number of significant digits. This is the case in experimental physics, for example. When you make a measurement of something, you can only measure it as accurately as your equipment will allow you. Therefore, you have an inherent error in that value already, which is going to cascade through any calculations you do with it. This means that while your computed answer may be 5.1826, you may know that the values this answer was calculated from were only accurate to three significant digits, and so the last two digits in this result (the 0.0026) don't matter. If there is a computational error in them, so be it - it's not going to hurt us.

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Date Added: Mar 23, 2008 Hits: 30 Rating: 0.00 Votes: 0

REST is short for Representational State Transfer. I'd place that into the category of names that makes more sense once you understand what REST is, but isn't quite so helpful in terms of explaining it. REST is often heard in the context of web services. When it was suggested as a topic for me to write about it was described to me as a web service but doing "the query string thing" to pass it parameters. That's not really what it's about, though.

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Date Added: Mar 23, 2008 Hits: 1 Rating: 0.00 Votes: 0

Forms Authentication is a system in which unauthenticated requests are redirected to a Web form where users are required to provide their credentials. Upon submitting the form, and being properly verified by your application, an authorization ticket is issued by Web application, in the form of a cookie. This authorization cookie contains the user's credentials or a key for reacquiring the user's identity (therefore making the user's identity persistent). In essence, Forms Authentication is a means for wrapping your Web application with a thin security layer, allowing you to have your own custom login interface and verification functionality.

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Date Added: Apr 18, 2008 Hits: 1 Rating: 0.00 Votes: 0

Validation server controls are set of controls that enable you to work with the information your end users inputs into application. Application should always ensure that valid data is recorded. To ensure valid data is collected, we apply set of validations to data we collect. Validation is a set of rules that you apply to the data you collect. In this way, we can bring certain degree of discipline in end user.

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Date Added: Apr 18, 2008 Hits: 1 Rating: 0.00 Votes: 0

This article discuss about the Web Parts, new feature introduced in ASP.NET 2.0. You can see many websites that are modular in nature today. Many websites often organize their content into modules that allows for personalization. Information is broken down into manageable parts which end users can rearrange or move around the parts to suit their preferences. User has also the flexibility to save his preferences for future browser sessions. This way, end user can be empowered to personalize site dynamically.

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Date Added: Apr 18, 2008 Hits: 28 Rating: 0.00 Votes: 0

Keyboard shortcuts are well known facility in Windows desktop applications. Shortcuts can increase efficiency and usability of your user interface. Although beginners like to use a mouse, that habit usually disappear after some time when user becomes more experienced, because keyboard shortcuts enables faster work. Many Windows applications, including Visual Studio .NET have so called "Expert Mode" when all tool bars and other visuals aids become invisible and user uses keyboard only.

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Date Added: Apr 18, 2008 Hits: 9 Rating: 0.00 Votes: 0

ASP.NET web applications are based on stateless HTTP protocol. New instance of the web page class is created each time the page is requested from the server. So, this would mean that all data on the page will be lost when page is posted to server. Then how do we create pages with controls which can preserve data across page postbacks.

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Date Added: Apr 18, 2008 Hits: 2 Rating: 0.00 Votes: 0

Client-Server architecture is 2-Tier architecture because the client does not distinguish between Presentation layer and business layer. The increasing demands on GUI controls caused difficulty to manage the mixture of source code from GUI and Business Logic (Spaghetti Code). Further, Client Server Architecture does not support enough the Change Management. Let suppose that the government increases the Entertainment tax rate from 4% to 8 %, then in the Client-Server case, we have to send an update to each clients and they must update synchronously on a specific time otherwise we may store invalid or wrong information. The Client-Server Architecture is also a burden to network traffic and resources. Let us assume that about five hundred clients are working on a data server then we will have five hundred ODBC connections and several ruffian record sets, which must be transported from the server to the clients (because the Business layer is stayed in the client side). The fact that Client-Server does not have any caching facilities like in ASP.NET, caused additional traffic in the network. Normally, a server has a better hardware than client therefore it is able compute algorithms faster than a client, so this fact is also an additional pro argument for the 3.Tier Architecture. This categorization of the application makes the function more reusable easily and it becomes too easy to find the functions which have been written previously. If programmer wants to make further update in the application then he easily can understand the previous written code and can update easily.

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Date Added: May 3, 2008 Hits: 4 Rating: 0.00 Votes: 0

ASP.NET 2.0 solved this problem by introducing master pages. A master page is a template for other pages, with shared layout and functionality. The master page defines placeholders for content pages. The result page is a combination (merge) of the master page and the content page. More about master pages read in Master Pages in ASP.NET 2.0 tutorial

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Date Added: May 3, 2008 Hits: 0 Rating: 0.00 Votes: 0

A cookie is a small amount of data which is either stored at client side in text file or in memory of the client browser session. Cookies are always sent with the request to the web server and information can be retrieved from the cookies at the web server. In ASP.Net, HttpRequest object contains cookies collection which is nothing but list of HttpCookie objects. Cookies are generally used for tracking the user/request in ASP.Net for example, ASP.Net internally uses cookie to store session identifier to know whether request is coming from same client or not. We can also store some information like user identifier (UserName/Nick Name etc) in the cookies and retrieve them when any request is made to the web server as described in following example. It should be noted that cookies are generally used for storing only small amount of data(i.e 1-10 KB)

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Date Added: May 3, 2008 Hits: 7 Rating: 0.00 Votes: 0