Web Development in ASP.NET

ASP.NET

ASP.NET is a web application framework developed by Microsoft. It is used for building dynamic, interactive and robust web applications, websites, and services. It enables developers to create powerful web applications using various programming languages like C#, Visual Basic, and F#.

• ASP.NET is a Server-Side Technology that operates on the server-side.
• It allows developers to build web applications that run on web servers before sending the content to users' web clients or browsers.
• ASP.NET applications are executed on the Common Language Runtime (CLR)
• It provides a consistent and manageable environment for code execution, memory management, and security.
• It provides robust security features and mechanisms, including authentication, authorization, and encryption, to help developers build secure web applications.
• ASP.NET applications are designed to be scalable and performant, capable of handling high traffic and demanding applications.
• ASP.NET is widely used in enterprise-level applications and supports the development of various types of web solutions, ranging from small-scale websites to large-scale enterprise applications.

Visual Studio:

ASP.NET integrates seamlessly with Visual Studio, Microsoft's integrated development environment (IDE), offering powerful tools for building, debugging, and deploying web applications. 

A dynamic and an interactive website is developed using ASP.NET and C#.NET. The idea is to demonstrate how a web application is developed using Visual Studio.NET as the IDE (Integrated Development Environment). ASP.NET allows developers to build web applications that run on web servers before sending the content to users' web clients or browsers. The developed website allows user to enter a number which is validated at the client-side and when button is clicked, the page is posted back to IIS Web Server. The code for button click is executed on server and the updated page HTML is sent back to the client browser. The browser interprets the HTML code and displays the output in the browser window.

ASP.NET Web Controls:

ASP.NET Web Controls are elements used in ASP.NET web applications to create interactive and dynamic user interfaces. These controls are server-side objects. It encapsulate HTML and programmatic logic, offering an abstraction layer to simplify web development. These are objects of their corresponding classes. The field of these classes are termed as properties that decides the look and feel of the component on the web page. The methods of these classes are used to manipulate the properties of the class. In addition, the class object has events which is executed on Server when the user browsing the website interacts with these controls on web page in browser window.

Basic Controls: 

TextBox, Label, Button, CheckBox, RadioButton, and others, which resemble their HTML counterparts but offer enhanced functionality and ease of use. In the demonstration video, following basic controls Label, TextBox and Button are used to create the dynamic and interactive Web form.

The Text property of Label is used to display the caption against the label. The font property is set the look and feel of the label. The name property is name a component to used in code.

The Text property of Textbox is used to set or get the text in the TextBox.  Here it is used to accept a number from user. The Text property to used in code to get the entered number to generate the table. 

The Text property of Button control displays it as a caption on the button. It indicates the functionality when button is clicked.

Validation Controls: 

Validation controls such as RequiredFieldValidator, RangeValidator, CompareValidator, and RegularExpressionValidator help validate user input on the client or server side, ensuring data integrity.

In the demonstration video, The RequiredFieldValidator is used to ensure that the user has entered the number whose table is to be displayed. The ErrorMessage property is used to set the message to be displayed to user when validation fails. The ControlToValidate is used the specify the name of the control whose contents is to be validated.

ASP.NET Web Controls provide an abstraction that simplifies web development by reducing manual HTML coding and offering functionalities that streamline common tasks, validation, data presentation, and user interaction. They enable developers to create dynamic, feature-rich web applications more efficiently.

Web forms in ASP.NET:

A web form in ASP.NET refers to a page or a section within a web application that allows users to input and submit data to the server. It acts as an interactive interface where users can enter information like text, selections, checkboxes, or file uploads. Web forms in ASP.NET are created using the <form> element and are facilitated by ASP.NET server controls.

Web forms allow developers to define server-side event handlers that respond to user interactions or actions on the form elements, enabling dynamic behavior based on user input.

Overall, ASP.NET web forms facilitate the creation of interactive and user-friendly interfaces by providing a structured way to collect and process user input in web applications.