Transmit JavaScript code from ASP.NET

Trying to transfer JavaScript code built using String Builder on the server-side (ASP.NET) to the HTML page's JavaScript. Here is my approach:

Utilizing a Master Page and an ASPX page structured like this:

<asp:Content ID="BodyContent" ContentPlaceHolderID="MainContent" runat="server">
<script  type="text/javascript>
// Initial JavaScript code
// Then a Literal tag, intended to be replaced by 
// JavaScript code from the server-side
<asp:Literal runat="server" ID="SomeID"></asp:Literal>

// Additional JavaScript.
</script>
</asp:Content>

In the code-behind ASPX.CS file:

protected void Page_Load(object sender, EventArgs e)
{
  Literal ID = (Literal)this.Page.FindControl("SomeID");
  ID.Text = SomeStuff();
}
private string SomeStuff()
{
  string javascript = "";
  StringBuilder sb = new StringBuilder();
  sb.Append("JavaScript Code");
  sb.Append("generated dynamically on the server-side");
}

Encountering an issue where this.Page.FindContol("SomeID") returns NULL. The Literal ID seems inaccessible when within script tags. Unable to wrap div or span tags around the Literal control inside the script tags as it would create extra markup in the JavaScript code. Any assistance is welcomed.

Thank you!

Answer №1

Do you have a master page in use? If so, consider using Master.FindControl(). If not, could you explain the reason for wanting to append? I recommend utilizing either the RegisterStartupScriptBlock() method or the RegisterClientScriptBlock() method instead.

Answer №2

It appears that you are attempting to link a script to a literal control from the code behind.

In this scenario, the literal control needs to be placed in the .aspx page. Create the necessary string builder in the code behind and then assign it to the literal control once the string builder is prepared.

this.AnotherID.Text = BuildContent();

Answer №3

Did you give this a shot:

public void Page_Load(object sender, EventArgs e)
{  
    var literals = Page.Master.FindControl("SomeID").Controls.OfType<Literal>();
    // Literal ID = (Literal)this.Page.FindControl("SomeID");
     this.literals.Text = GenerateText();
}

private string GenerateText()
{
    string javascript = "";
    StringBuilder codeBuilder = new StringBuilder();
    codeBuilder.Append("Some JavaScript Code");
    codeBuilder.Append("generated dynamically on the server side");
    return codeBuilder;
}

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

Issues with resetting AngularJS form---"The AngularJS form

I have been putting in a lot of effort to make this work. Despite my knowledge about child scopes, prototypal inheritance, and the use of dot notation for the model, I am facing an issue with resetting the form. You can access the hosted form here. The rel ...

Retrieve information from an API and assign the corresponding data points to the graph using Material UI and React

I have 4 different APIs that I need to interact with in order to fetch specific details and visualize them on a bar graph. The data should be organized based on the name, where the x-axis represents the names and the y-axis represents the details (with 4 b ...

Adjusting the height of content in Angular Material 2 md-tab

I've recently started working with angular material and I'm facing an issue while trying to implement md-tab into my application. The problem is that I can't seem to style my tab content to take up the remaining height of the screen. Could s ...

What are some reasons why the XMLHttpRequest ProgressEvent.lengthComputable property could return a value of

I've been struggling to implement an upload progress bar using the XMLHttpRequest level 2 support for progress events in HTML5. Most examples I come across show adding an event listener to the progress event like this: req.addEventListener("progress ...

JavaScript function encountered an error due to an expected object

Currently, I am in the process of developing an application using VS2015, JavaScript, Angular, and MVC 5. Here is an excerpt of my JavaScript code: var myApp = angular.module('QuizApp', []); myApp.controller('QuizController', [&apos ...

What is the best method for incorporating a JavaScript redirect into an Android WebView?

My issue involves loading a page into a webview. Typically, when I use the code webview.loadUrl(url); it functions as expected. The url contains a javascript code that redirects the page. Here is the javascript code: <script type="text/javascript"> ...

Delay the execution using Javascript/jQuery, remove the last element from the DOM

Within a jQuery AJAX call, I am using a $.each() loop. Each element in the response data triggers the addition of a portion of HTML to a container class in my index.html file. To view the code and ensure proper formatting, visit the codepen here as the pa ...

Encountering problem with rendering the header in the footer within a customized package built on react

I am currently working on creating a node package that consists of simple HTML elements. The package is named fmg_test_header. These are the files included in the package: header.jsx index.js package.json header.js function Header() { return "< ...

Guide to setting up value observation in React Context for optimal functionality

Imagine a scenario where there is a Parent Component that provides a Context containing a Store Object. This Store holds a value and a function to update this value. class Store { // value // function updateValue() {} } const Parent = () => { const ...

Trigger an immediate Primefaces update using a JavaScript function

Having an issue where: upon page load, I attach a 'keypress' event listener to every input field on the page. The goal is to check for special characters in the input and remove them. Below is the function that executes on page load: function ...

Protractor encounters an "Error starting WebDriver session" message

After starting a server with webdriver-manager start, encountering an error when attempting to run protractor: Using the selenium server at http://127.0.0.1:4444/wd/hub [launcher] Running 1 instance of WebDriver ERROR - Unable to initiate a WebDriver sess ...

What is the method for checking the pathname condition?

Hello, I am attempting to create an if statement for the pathname, but I am having trouble getting it to work properly. if (pathname == "/") { category = 'home'; pagetype = 'homepage'; } If the pathname matches "/", the script ...

The React getTime() method does not properly update the state

I am attempting to update the state of the component Demoss using an external function called getTime(). My goal is to start updating the time in the state time when the page loads. In order to achieve this, I have called it in the componentDidMount meth ...

Utilizing Jquery to enhance table filtering functionality

I created a table listing various places, along with buttons to filter the list. The first filter is based on location (north, east, central, south, west) determined by postcode. The other filter is for "impress" which only displays places with a rating of ...

struggling with responseText functionality in javascript

I am encountering an issue with passing variables from PHP to JavaScript using JSON. The problem lies in the fact that I am able to debug and view the items in the responseText within my JavaScript, but I am unable to assign them to a variable or properly ...

An issue arises when trying to import the modal popup

Hey there! I'm currently trying to implement a modal popup in react-bootstrap, but I keep running into an error that says "Props not defined". I followed the instructions from the react-bootstrap documentation, but I can't seem to figure out what ...

Iterate through a collection of files in an asynchronous manner by leveraging promises and defer statements

I have a specific objective to navigate through a directory of files, perform certain operations on each file, and then produce a JSON object with a portion of the directory. Initially, I managed to achieve this using the synchronous functions in Node&apo ...

ClickOnce deployment software

Our software requires an updater functionality. While considering using "ClickOnce", I discovered that the ClickOnce deployer restricts writing information to the registry. Is it possible to utilize ClickOnce solely for the updater tool without the deploym ...

jQuery can be utilized to generate repeated fields

$(document).ready(function(){ $('#more_finance').click(function(){ var add_new ='<div class="form-group finance-contact" id="finance_3"><div class="col-sm-9"><label for="firstName" class="contro ...

Animate specifically new items in a list rendered via ngFor in Angular animation

I am working with a list of array items in an ngFor loop. I have a basic button that adds an item to the array. My goal is to apply an animation only to the newly added items, but currently all the existing list items also receive the animation upon page l ...