Ajax in ASP.NET

Ajax in ASP.NET
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Written by Sagar RabidasJanuary 24, 2022
8 min read
ASP .Net
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Sagar Rabidas

Software Developer

Let's start with Ajax in ASP.NET

Ajax in ASP.NET

AJAX in ASP.NET is known as Asynchronous JavaScript and XML. It is all about updating the functions of a web page, without loading it every time we open the webpage. It is a technique used to create very fast and dynamic web pages.

Ajax in ASP.NET is majorly used when the user is having dynamic content and has to be reloaded multiple times after the changes have been done. This technology also speeds up the response time of the page. It also has a user-friendly interface and interactive web pages.

Working of Ajax in ASP.NET

AJAX is the advanced version of the static pages that were used for a long time. AJAX is built for dynamic nature and a user-friendly environment. AJAX in ASP.NET works like the below-listed points.

The XMLHTTPRequest object is created from the browser and sent to the server-side.

  1. The server will process the request sent by the browser and will send the data back to the browser with the requested detail.
  2. The browser will process the data and update the content on the page.
  3. Once the content is updated the user can view the data on the screen.

Examples of Ajax in ASP.NET

Here are some examples that are explained below:

Example #1

In this example, the button is created but the action will not be performed when we click the button.

Code:

<html>
<body>
<div id= “Demonstration”>
<h1> Example of AJAX </h1>
<h2> Let’s take examples on buttons</h2>
<button type=”button” > Click on this button </button>
</div>

Example #2

In this example, by clicking on the button you need to redirect it to some other page, we can see how we can take action.

Code:

<!DOCTYPE html>
<html>
<body>
<p>Let’s see what the user is typing.</p>
<input type="text" id="textbox" oninput="textfunction()">
<p id="text"></p>
<script>
function textfunction() {
var obj = document.getElementById("textbox").value;
document.getElementById("text").innerHTML = "The letters you are typing: " + obj;
}
</script>
</body>
</html>

Example #3

In this example, we will discuss how to perform the load function in ajax.

Code:

<html>
<body>
<div id="Demonstration">
<h3>AJAX EXAMPLE ON LOAD</h3>
<button type="button" onclick="load('ajax_load_GET.asp', loadfunction)">Click on this button
</button>
</div>
<script>
function load(url, copy_function) {
var xhttp;
xmlhttp=new XMLHttpRequest();
xmlhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
copy_function(this);
}
};
xmlhttp.open("GET", url, true);
xmlhttp.send();
}
function loadfunction(xmlhttp) {
document.getElementById("Demonstration").innerHTML =
xmlhttp.responseText;
}
</script>
</body>
</html>

Example #4

After clicking on the button the content of the asp file will get printed on the screen. There are two methods to retrieve the information i.e. GET and POST methods.

Code:

<!DOCTYPE html>
<html>
<body>
<h3>AJAX EXAMPLE ON LOAD</h3>
<h3> This example is for POST method </h3>
<button type="button" onclick="loadPOST()">Click on this button</button>
<p id="Demonstration"></p>
<script>
function loadPOST() {
var xmlhttp = new XMLHttpRequest();
xmlhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
document.getElementById("Demonstration").innerHTML = this.responseText;
}
};
xmlhttp.open("POST", “ajax_load_POST.asp”, true);
xmlhttp.send();
}
</script>
</body>
</html>

Features of Ajax in ASP.NET

Below listed are a few important features of AJAX in ASP.NET

blogpost
  1. User-Friendly: This is one of the main features in Ajax where the user interface of the webpage is so flexible and comfortable for the user to use the page as he must have to fill in all the details required.
  2. Web page faster: This feature in AJAX is the primary one as it has been built for the same. This feature allows the webpage to create the request and the server response time within seconds. These features also make the webpage reload faster than the usual ones. We don’t have to reload the whole page all the time only the specific part has to be reloaded if it has been changed.
  3. Server Independent technology: AJAX in asp.net can be used irrespective of any programming language like JavaScript, PHP, etc. Many languages support AJAX and its characteristics and features.
  4. Performance: It is mainly used for the performance and speed of a webpage. The time taken from creating the XMLHTTP request to getting the data response back from the server is quick while using AJAX. So one of the major factors is used for performance basis on a webpage.
  5. Support Browsers: AJAX is primarily used because it supports almost all the browsers used in the market. Apart from the concept that creates the XMLHTTP object, the processing will be the same for all the web browsers because JavaScript language is used in most web applications.
  6. Interactive Applications: Using ajax it is very easy for the developer or programmer to create more interactive and user-friendly web applications. As we know in today’s world everything is a two-way process where you have to put as well as get the data, so it is helpful in the two-way process where the client can interact with the server to fetch as well as write the data.

asp net
Ajax
Ajax in ASP NET
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Sagar Rabidas
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