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.

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.

The server will process the request sent by the browser and will send the data back to the browser with the requested detail.

The browser will process the data and update the content on the page.

Once the content is updated the user can view the data on the screen.

Here are some examples that are explained below:

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

<h2> Let’s take examples on buttons</h2>

<button type=”button” > Click on this button </button>

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.

<p>Let’s see what the user is typing.</p>

var obj = document.getElementById("textbox").value;

document.getElementById("text").innerHTML = "The letters you are typing: " + obj;

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

<button type="button" onclick="load('ajax_load_GET.asp', loadfunction)">Click on this button

xmlhttp.onreadystatechange = function() {

if (this.readyState == 4 && this.status == 200) {

document.getElementById("Demonstration").innerHTML =

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.

<h3> This example is for POST method </h3>

<button type="button" onclick="loadPOST()">Click on this button</button>

document.getElementById("Demonstration").innerHTML = this.responseText;

xmlhttp.open("POST", “ajax_load_POST.asp”, true);

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

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.

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.

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.

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.

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.

Ajax in ASP.NET

XMLHttpRequest is a JavaScript object that allows developers to send HTTP requests from a web page to a server. The GET request is one of the most commonly used HTTP requests, and it is used to retrieve data from a server. In this blog, we will discuss how to send data in a GET request of XMLHttpRequest in JavaScript.

Create an instance of the XMLHttpRequest object

In this example, we create an instance of the XMLHttpRequest object and assign it to the variable xhr.

Build the query string with the data to send

  .map(([key, value]) => `${encodeURIComponent(key)}=${encodeURIComponent(value)}`)

const url = `https://example.com/api?${queryString}`;

In this example, we create a JavaScript object data with two properties, name and age. We then use the Object.entries method to convert the object to an array of key-value pairs, which we map to an array of encoded key-value pairs. Finally, we join the array of encoded key-value pairs with the & symbol to create a query string. We append the query string to the API endpoint URL to create the full URL for the GET request.

In this example, we use the open method of the XMLHttpRequest object to open a GET request with the URL we created in step 2.

In this example, we use the send method of the XMLHttpRequest object to send the GET request to the server.

In this example, we use the onload method of the XMLHttpRequest object to handle the response from the server. We check the status property of the XMLHttpRequest object to ensure that the response was successful, and we log the response text to the console. If the response was not successful, we log an error message to the console.

By following these steps, you can send data in a GET request of XMLHttpRequest in JavaScript. This approach can be used in a variety of applications, such as retrieving data from an API or server, and can be customized to include additional headers, parameters, or data as needed.

Today we will discuss how to send data in a GET request of XMLHttpRequest in JavaScript, developers can create an instance of the XMLHttpRequest object.

How to send data in a 'GET' request of XMLHttpRequest in javascript?

The AjaxControlToolkit is an open-source project that provides a set of web controls and components that extend the functionality of the ASP.NET framework. It uses JQuery as its underlying JavaScript library to provide features like animations, effects, and DOM manipulation. In this blog, we will discuss how to update the AjaxControlToolkit to use the latest version of JQuery.

The first step is to download the latest version of JQuery from the official website. Extract the downloaded files and copy the jquery.js or jquery.min.js file to your project directory.

The next step is to replace the existing JQuery file used by the AjaxControlToolkit with the new version. Locate the existing jquery.js or jquery.min.js file in your project directory, and replace it with the new version of the file.

The AjaxControlToolkit uses the ScriptManager control to manage the client-side scripts, including the JQuery library. To update the AjaxControlToolkit to use the latest version of JQuery, add the following code to the web.config file:

In this example, we are referencing the new version of the JQuery library (jquery-3.6.0.min.js) in the <scriptReference> element. Make sure to update the path to match the location of the new JQuery file.

Once the updates have been made, test the AjaxControlToolkit to ensure that it is working as expected with the latest version of JQuery. Run your application and verify that all the functionalities and components are working as intended.

In conclusion, updating the AjaxControlToolkit to use the latest version of JQuery is a straightforward process. By following the steps outlined above, developers can ensure that their applications are using the most up-to-date version of JQuery and take advantage of its latest features and performance improvements.

Today we will learn how to update AjaxControlToolkit to use the latest version of JQuery by following these simple steps.

How to update AjaxControlToolkit to use the latest version of JQuery?

I am developing a Website with django. Now, let's say I have a database where values can change at any time. Every time the DB changes, I want to execute a function (no problem with that) and update some data I passed to a template without a page refresh.

At first, I thought about AJAX, but as it seems an AJAX-Request must be started from the frontend, right?

Long story short: What I want specifically is to update some CSS depending on some data changes in the backend without any page refresh.

Django: Sending data from backend to frontend without page refresh

Is it possible that using jQuery, I cancel/abort an Ajax request that I have not yet received the response from? 

Abort Ajax requests using jQuery

I've been using WebSockets for a while now, I have chosen to create an Agile project management tool for my final year project at University utilizing Node server and WebSockets. I found using WebSockets provided a 624% increase in the number of requests per second my application could process.

However since starting the project I've read of security loopholes, and some browsers choosing to disable WebSockets by default..

Why use AJAX when WebSockets seems to do such a great job of lowering latency and resource overhead, is there anything that AJAX does better than WebSockets?

Why use AJAX when WebSockets is available?

Is there any way to disable the Same-origin policy on Google's Chrome browser? 

Disable same origin policy in Chrome

I have a search Input box and I want display 5 similar phrases every time a user searches for a phrase?

for Example : If the user searched for "ram" ... Return the following word system to me and display it ram 4 ram 8 ram 16 rampal ...

Asp.Net Core 3.1-Search for a phrase and suggest 5 similar phrases with Ajax?

From what I've found, Facebook does not use a $jquery refresh to get get the updated newsfeed, the feedback/likes are separate query's to the database - this makes me suppose they are separate jquery loads, however, those appear almost instantly?

Facebook, how does it use ajax and only update on the users side when called?

The flask utility underneath makes ajax calls indefinitely to a back-cease index characteristic which queries an information base and injects results into the template.

I'm waiting for that, after ajax is finished, the injected information may be refreshed hence updating the plot but it's now not.

The way to replace ajax in a manner that refreshes the injected records into 'index.Html' (subsequently updating plot which consumes those records)?

                contentType: 'application/json;charset=UTF-8',

                success: function (data) {

                  ??? perhaps something here???

    setInterval(ajaxCall, 2000); // repeatedly calls ajaxCall()

    var graphs = {{graphJSON | safe}}; // saves injected data to variable

    Plotly.plot('load',graphs,{}); // passes saved variable to Python function for plotting which then appears in div with 'load' id above.

from flask import render_template, Blueprint,  

from App.functions.reddit_streamer import AWS_RDB

@core.route('/', methods = ['GET', 'POST'])

    fig = px.line(df.loc[1:,:], x = 'date' , y = '# of comments')

    graphJSON = json.dumps(fig, cls = plotly.utils.PlotlyJSONEncoder)

    return render_template('index.html', graphJSON = graphJSON)

Passing ajax-requested data into Python function

please someone tell me about this and give an example.

Ajax is a client-side technology. In simpler terms, Ajax is mostly used for updating or modifying the webpage contents without having to refresh it.

NaN :-"Not-a-Number". In JavaScript, NaN is a number that is not a legal number

New keyword in JavaScript is used to create an instance of an object that has a constructor function. On calling the constructor function with ‘new’ operator

const fruit1 = new Fruit('Yellow', 'Sweet', 1);

A falsy value is something which evaluates to FALSE, for instance when checking a variable. There are only six falsey values in JavaScript: undefined, null, NaN, 0, "" (empty string), and false of course.

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Trending Blogposts on ajax

Ajax in ASP.NET

How to send data in a 'GET' request of XMLHttpRequest in javascript?

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Popular Discussions on ajax

openDjango: Sending data from backend to frontend without page refresh

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openAbort Ajax requests using jQuery

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openWhy use AJAX when WebSockets is available?

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openDisable same origin policy in Chrome

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openAsp.Net Core 3.1-Search for a phrase and suggest 5 similar phrases with Ajax?

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openFacebook, how does it use ajax and only update on the users side when called?

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openPassing ajax-requested data into Python function

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open What is AJAX, NaN, a new keyword, the falsy value in Javascript ?

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