Explain the distinction between a traditional HTTP request and an Ajax request

My current project involves working with ASP.NET WebApi and Angularjs.

Within the WebApi, there is a method defined as follows:

 [System.Web.Http.AcceptVerbs("POST")]
        [System.Web.Http.HttpPost]
        public HttpResponseMessage SearchAddress(SearchDetails searchDetail)
        {
            //13.03993,80.231867
            try
            {
                if (!WebSecurity.IsAuthenticated)
                {
                    HttpResponseMessage response = Request.CreateResponse(HttpStatusCode.NotAcceptable);
                    return response;
                }
                List<CollegeAddress> CollegeAddress = addressService.GetAddressFromDistance(17.380498, 78.4864948, 2000);
                HttpResponseMessage responseData = Request.CreateResponse(HttpStatusCode.Accepted, CollegeAddress);
                return responseData;
            }
            catch (Exception e)
            {
                HttpResponseMessage response = Request.CreateResponse(HttpStatusCode.NotFound);
                return response;
            }
        }

I need to make calls to this method from the client side.

However, when attempting to call this method using Ajax, I encountered an issue where the method parameter searchDetail was always null:

$.ajax({
            method: 'POST',
            url: rootUrl + '/api/Address/SearchAddress',
            async: false,
            data: searchDetail,
            type: "json",
            headers: {
                'Content-Type': "application/json; charset=utf-8"
            }
        }).success(function (response) {
            return response;

        }).error(function () {
            toastr.error('Something is wrong', 'Error');
        })

In contrast, calling the method via an HTTP request proved successful:

 $http({
            method: 'POST',
            url: rootUrl + '/api/Address/SearchAddress',
            data: searchDetail,
            headers: {
                'Content-Type': "application/json; charset=utf-8"
            }
        }).success(function (response) {
            toastr.success('Account Created successfully!', 'Account Created');
            return response;
        }).error(function () {
            toastr.error('Something is wrong', 'Error');
        })

Why? What is the difference between them? Why is Ajax not working and HTTP is?

Answer №1

When using jQuery's ajax(), the data is sent with Content-type: x-www-form-urlencoded.
On the other hand, Angular's $http sends the data with Content-type: application/json

If your server expects JSON, but you set up the $.ajax() call incorrectly for that.

According to the documentation:

  • The method property does not seem to exist.
  • The type property should determine the type of the request (e.g. 'GET', 'POST', etc.).
  • To change the default content-type to application/json, use the contentType property.

Although I have not personally tested it, a method like this should work:

$.ajax({
  type: 'POST',
  url: rootUrl + '/api/Address/SearchAddress',
  async: false,
  data: searchDetail,
  contentType: 'application/json; charset=utf-8'
});

Answer №2

$.ajax({
        method: 'POST',
        url: rootUrl + '/api/Address/SearchAddress',
        async: false,
        data: searchDetail,

It seems that the searchDetail variable is an object. According to the documentation, the data property needs to be converted into a query string if it's not already a string:

... It is converted to a query string, if not already a string.

If the server requires JSON data, then you must convert it to JSON format before sending:

data: JSON.stringify(searchDetail),

Additionally, as highlighted by @ExpertSystem, remember to change method to type.

Answer №3

To avoid duplication, only include the second HttpPost method and remove the namespace from it. For the search detail to be retrieved from the body, make sure to use the [FromBody] attribute.

    [HttpPost]
    public HttpResponseMessage GetAddressInfo([FromBody]SearchDetails addressDetail)
    {

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

Requirements for using Angular JS and Node JS

With upcoming projects involving AngularJS and Node.js, I'm a bit apprehensive as I don't have much experience with JavaScript. Should I start by picking up a book on each technology, or is it essential to learn more about JavaScript first before ...

Assistance needed to integrate vaccine center data with the administration, MongoDB, and MEAN stack project

Hey there, I'm a beginner in developing a MEAN stack project. Currently, I am facing an issue with two collections: one for users who are admins and another for healthcare centers providing vaccines. My task involves registering an admin to a healthca ...

Guide to efficiently populating a self-referential Mongoose model

My goal is to populate data across multiple levels using the fields from an Article model: comments: [ { type: Schema.Types.ObjectId, ref: "Comment" } ] and also from ...

Use jQuery to extract content from a markup string in order to acquire text

Below is the code snippet I am working with: <span> Some text blalablalalbal<br/><br/> "You are Amazing" <br/><br/> ----What can I do for you?<br/><br/> </span> I would like to hide the first line and custo ...

Showing a restricted number of rows in the JSP page

<table class="grid_alt" cellspacing="0" rules="all" border="1" id="id1" style="width:720px;border-collapse:collapse;"> <tbody> <tr align="left"> <th scope="col"><%=partner %></th><th scope="col"><%=item %>< ...

Ensure that the pattern meets the regular expression criteria

Must consist of at least 3 characters in lowercase, with a maximum of 2 numbers and no special characters allowed. I attempted to use ^[a-zA-Z0-9]*$ but I couldn't restrict the number of numbers used. Could someone provide assistance, please? ...

Is it possible to integrate a collection of libraries along with external dependencies into Vite?

Currently, I am in the process of packaging a library for npm that uses type: "module". To accomplish this, I have configured vite's library mode with the following settings: export default defineConfig({ css: { postcss: { plugin ...

Conceal the div element if the screen size drops below a certain threshold

Is it possible to hide a div element when the browser width is less than or equal to 1026px using CSS, like this: @media only screen and (min-width: 1140px) {}? If not, what are some alternative solutions? Additional information: When hiding the div eleme ...

What is the best way to retrieve the updated value following a mutation in Vuex?

In my Vuex module, I have a simple setup for managing a global date object: import moment from 'moment'; const state = { date: moment() } // getters const getters = { date: state => state.date, daysInMonth: state => state.dat ...

The height of the textarea remains constant even when prepopulated with text

I am facing a little problem. Currently, I am working on a project where I need to display a form after the user clicks on a call to action. Everything seems fine until this point. The issue arises when the user clicks the button to show the form, as the ...

Are you experiencing issues with modal contents extending beyond the modal on smaller screens?

I recently installed a modal plugin called blockUI for my image uploading needs. Although I have styled and positioned everything accordingly, I am facing an issue: Whenever I resize the browser screen, switch to my iPhone, or use another screen, some con ...

Preventing grid-collection from iterating within a for loop in Liquid on Shopify

I am trying to find a solution to prevent the grid-collection div from iteratig inside a for loop. Below is a snippet of my code in liquid: {% for block in section.blocks %} {% if block.settings.download_title %} <div class="title& ...

Form comments in Bootstrap are causing rows to shift

Currently, I am working on an Angular-powered horizontal form that utilizes various bootstrap components. However, I have encountered an issue with a "Comment field" that is causing the adjacent columns to shift downwards. I initially suspected the problem ...

Tips for dividing the elements of an array by 4 using Javascript or ReactJS

I have a large array of items that I need to organize into 4 sections in order to improve the display on my user interface. The array contains up to 20 objects, and my objective is to create 4 separate arrays each containing 5 objects. let attributes = [ ...

Links that have dropdown menus are not visible on the webpage, whereas links without dropdown menus are still functional

For some reason, the links that have dropdown menus no longer display the dropdown when you hover over them. The links without dropdowns are working fine. This issue is occurring on this website, specifically on the green navbar. I am unsure of what coul ...

Fine-tuning Table Filter Javascript

I need help modifying some JavaScript code that currently searches for user input in the first column of a table and hides rows that do not contain that text. I want to update it so that it searches both columns 1 and 2: HTML: <input type="text" id="m ...

Include a spinner to add class before proceeding

As I work on coding a solution that triggers certain actions when the user presses enter, I've encountered an issue where it sometimes takes a while to process. To let the user know that the program is working, I have decided to display a spinner in t ...

I'm having trouble showing the concealed list with JavaScript

I am new to javascript and facing a challenge. Whenever I update the list items in an HTML example from engineer, pilot, technician, if I select engineer, there should be an onchange event calling a function in JavaScript that shows a hidden select list co ...

There is an issue with Nuxt 3 layers not functioning properly when trying to access a project page from a different

Is there a way to make a project function independently while still being accessible through layers and able to run smoothly? The current project structure is as follows: ...

The trio of Javascript, Ajax, and FormData are

I'm struggling with sending form values to a PHP file. Here's the code I have: <form role="form" id="upload_form" method="post" enctype="multipart/form-data"> <div class="form-group"> <label for="formlabel">Title< ...