What is the correct way to execute a JavaScript function during the page load event?

Currently, I am utilizing a currency conversion Web Service and I have implemented a Javascript function to display the result upon clicking a button. However, I would like this Javascript function to execute automatically when the page loads. Here is the code snippet that I attempted:

protected void Page_Load(object sender, EventArgs e)
{
    ScriptManager.RegisterClientScriptBlock(Page, this.GetType(), "Javascript", "function(data);", true);
}

Despite my efforts, the function still does not trigger on page load. Below is the Javascript code that I am using:

<script type="text/javascript">
    $(function () {
        $('#btnConvert').click(function () {
            var amount = $('#txtAmount').val();
            var from = $('#ddlfrom').val();
            var to = $('#ddlto').val();
            $.ajax({ type: "POST",
                url: "WebService.asmx/CurrencyConversion",
                data: "{amount:" + amount + ",fromCurrency:'" + from + "',toCurrency:'" + to + "'}",
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                success: function (data) {
                    var dot = data.d.indexOf(".");
                    var eg = data.d.substring(0, dot + 2);
                    var eg1 =data.d.substring(11, 50);
                    $('#currency_converter_result').html(eg + eg1);
              }
            });
        });
    });
</script>

Answer №1

To clarify your query, you are looking to trigger the click event upon loading. You can achieve this by removing the pageload section and simply adding click() to the binding.

<script type="text/javascript>
    $(function () {
        $('#btnConvert').click(function () {
            var amount = $('#txtAmount').val();
            var from = $('#ddlfrom').val();
            var to = $('#ddlto').val();
            $.ajax({ type: "POST",
                url: "WebService.asmx/CurrencyConversion",
                data: "{amount:" + amount + ",fromCurrency:'" + from + "',toCurrency:'" + to + "'}",
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                success: function (data) {
                    var dot = data.d.indexOf(".");
                    var eg = data.d.substring(0, dot + 2);
                    var eg1 =data.d.substring(11, 50);
                                        $('#currency_converter_result').html(eg + eg1);
              }
            });
        }).click();
    });
</script>

Answer №2

Your code appears to be functional, but the JS function(); you are using doesn't have any meaningful effect.

The $(function(){}); syntax is essentially a shorter version of $(document).ready(function(){});

Reference

Answer №3

No coding required for this task

$(function () { });

This is the same as

$( document ).ready(function() {  });

Any code inside $(function() { }); will run automatically upon page load

Answer №4

  $( document ).ready(function() {
 $('#btnConvert').click(function () {
// add your code here

});});

Avoid calling javascript functions from the code behind

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

Issue with fullPage.js - Unable to scroll to footer on the last section of the page

I'm currently working with the fullPage.js plugin () and encountering some issues. While sliding through each section, everything functions as expected. However, when I reach the last section and try to scroll down to the footer below it, I encounter ...

Node.js: Obtain the type of file

Hey everyone, I am currently working on a project in Node.js where I need to extract the file type. This is necessary as I have to rename the file before uploading it for version control and then perform some processing tasks on it. Although I know that c ...

Angular - Clear the selection of <select><option> if I opt out of accepting the change

I have created a dropdown menu using HTML <select> and <option> tags, along with a JavaScript function that triggers a confirmation dialogue when an option is selected. The confirmation offers a simple choice between "yes" or "no." If the user ...

Displaying nested object properties in HTML through iteration

What is the correct way to access them if item.NestObj.textpropertyVal is showing incorrect? success: function(data){ var html = ""; $.each(data.mainOutterObj, function (index, item) { html += "<ul&g ...

Tips on efficiently adding and removing elements in an array at specific positions, all the while adjusting the positions accordingly

My challenge involves an array of objects each containing a position property, as well as other properties. It looks something like this: [{position: 1, ...otherProperties}, ...otherObjects] On the frontend, these objects are displayed and sorted based on ...

Mini-navigation bar scrolling

I am trying to create a menu where I want to hide elements if the length of either class a or class b is larger than the entire container. I want to achieve a similar effect to what Facebook has. How can I make this happen? I have thought about one approac ...

Activate Button upon Textbox/Combobox/RadDatePicker Modification through JavaScript

On my ASP.NET form, I have various input elements including textboxes, dropdowns, date pickers, and update buttons. My goal is to enable the update button whenever a user makes a change in any of these fields. To achieve this, I applied a specific CSS cla ...

Vuex was unable to locate the required dependency

Currently, I'm following an instructional video that incorporates Vuex. As shown in my package.json dependencies, I have installed Vuex: { "name": "blabla", "version": "1.0.0", "description": "blablaa", "author": "blabla", "private": true, ...

Angular directive ng-template serves as a component type

In the code snippet below, <!DOCTYPE html> <html> <head> ..... </head> <body ng-app="app"> <script type="text/ng-template" id="my-info-msg.html"> <s ...

Exploring the enhanced capabilities of FeathersJS by integrating express-babelify-middleware

Attempting to integrate express-babelify-middleware with FeathersJS, an error message appears in the browser console: The error reads: ReferenceError: main_run is not defined This indicates that babelify may not be functioning correctly or I might be u ...

Refreshing select2 dropdown options dynamically with AJAX updates

I have a select dropdown for locations that is initialized using select2 on page load. I am looking to dynamically update the data in the dropdown at regular intervals using ajax calls. However, when I attempt to update the data in select2, the dropdown ...

Navigating through the React components using react-router and accessing the props can

Is there a way to access this.props from the <Router>'s onUpdate function? I need to know the current route and access this.props.route in order to identify the page (name). Unfortunately, I haven't found any resources on how to achieve thi ...

Incorporate the feedback received from the user in the previous trial as a prompt for the next

I am currently working on developing an experiment using the JSPsych JavaScript package. The main goal of my experiment is for participants to input a letter in a survey-text trial, and then have that same letter presented back to them as a stimulus in the ...

When I attempt to press the shift + tab keys together, Shiftkey is activated

Shiftkey occurs when attempting to press the shift + tab keys simultaneously $("#buttonZZ").on("keydown",function (eve) { if (eve.keyCode == 9 && eve.shiftKey) { eve.preventDefault(); $("#cancelbtn").focus(); } if (eve. ...

Interactive web page with dynamic JQuery functionality and navigable page links

I am working on the project/index.html page <html> <head> <title>Index</title> <scripts...> </head> <body> Hello <div id="content"></div> <button id="page1" value="page1"/> <but ...

Error authorizing AJAX call to Gmail API

I'm just getting started with the GMail API and I'm attempting to use AJAX to fetch emails. This is my code: $.ajax({ beforeSend: function (request) { request.setRequestHeader("authorization", "Bearer xxxxxxxxxxxxxxxxx.a ...

What is the best way to organize a massive file over 10Gb filled with words?

I've been presented with this interview query: You have an input file containing words (which could be a jumble of letters) separated by commas, and the file size is 10 GB or more. Can you devise an algorithm to sort all these words? Keep in min ...

Send a value to several PHP pages simultaneously using JQuery

I find myself asking this question due to my lack of experience. Is it possible to send a value to multiple PHP pages using JQuery? Let me illustrate what I am attempting to achieve. $(function() { $("#account").change(function() { $("#facilities" ...

What is the best way to extract basic body content using AJAX?

How do I simply parse the string 1399508637585,2252? When I open the desired page, the response above is displayed in the browser. I also tested it with hurl.it: HEADERS Content-Length: 18 Content-Type: text/html; charset=utf-8 Date: Thu, 08 May 2014 00 ...

What could be causing the template UI to not display the Vue data?

As someone new to Vue, I have defined my Vue code in the following way: import Vue from "vue"; export default Vue.extend({ data: () => { message: "show message"; }, }); <script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js ...