The JavaScript invocation of a page method resulted in an error 500, with JSON response

I am utilizing an autocomplete control which can be found here:

After making some modifications, my code looks like this:

var json_options;
    json_options = {
        script:'ReportSearch.aspx/GetUserList?json=true&limit=6&',
        varname:'input',
        json:true,
        shownoresults:true,
        maxresults:16,
        callback: function (obj) { $('#json_info').html('you have selected: '+obj.id + ' ' + obj.value + ' (' + obj.info + ')'); }
    };

$('#ctl00_contentModule_txtJQuerySearch').autoComplete(json_options);

In the C# Code behind file (aspx.cs), I have the following method:

    [System.Web.Services.WebMethod]
[System.Web.Script.Services.ScriptMethod]
public static string[] GetUserList(string input)
{
    List<string> lUsers = new List<string>();

    Server.DAL.SQLServer2005.User user = new Server.DAL.SQLServer2005.User();
    Server.Info.AuthUser aUser = (Server.Info.AuthUser)HttpContext.Current.Session["AuthUser"];
    List<Server.Info.User.UserDetails> users = user.GetUserList(aUser, input, 16, true);
    users.ForEach(delegate(ReportBeam.Server.Info.User.UserDetails u)
    {
        lUsers.Add("(" + u.UserName + ")" + u.LastName + ", " + u.FirstName);
    });
    return lUsers.ToArray();
}

The error message I receive is:

Server Error in '/WebPortal4' Application. Unknown web method GetUserList. Parameter name: methodName

If I attempt to change any parameter names, I get an error indicating that they do not match. Despite ensuring everything is accurate, the error persists.

I would really appreciate any assistance on this matter.

Answer №1

If you have your code within a user control instead of directly in the aspx file, it could potentially lead to some issues. Personally, I've encountered difficulties when doing this in the past. While I can't recall the exact nature of the problems I faced, ultimately, I found success by moving my web methods to separate asmx files rather than keeping them within the aspx files. This approach has proven to be much more effective and reliable =)

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

What is the reason why sinon stub is unable to replace the actual exports.function?

I have a situation where my controller async function is calling another async exported function. I am looking to test specific results of the dependent function rather than testing the dependency itself. However, when I try to stub the function, it seems ...

Maximizing Efficiency with Selenium: Leveraging the Page Object Pattern and Page Factory

After spending a year developing my Project from scratch, I have reached a certain level of maintenance with my Framework and tests. However, as each day passes, I find myself questioning whether I am implementing good practices in my Project. It would gre ...

Using Javascript to convert numerical input in a text box into its corresponding letter grade

I have been working on this code, but I am facing some issues with displaying the result. My goal is to input a number, such as "75", click a button, and have the bottom textbox show the corresponding letter grade, starting with "C" for 70-80 range. Here i ...

Unable to install react-dom/test-utils using npm

I recently included two libraries in my package.json "devDependencies": { ... "react-dom/test-utils": "*", "react-test-renderer/shallow": "*" }, These were recommended by the React documentation to align with version 16 of the React ecosy ...

Issues arise with the functionality of CSS and JavaScript after successfully deploying a Next.js and React project to the server side

I need to deploy my React+Next and Node.js projects on the same port. To achieve this, I converted my TypeScript files to JavaScript and moved the .next folder to the backend side. Now, my API and frontend code are functioning on the same port thanks to Ex ...

What is the best way to create a React component that renders a class component as a functional component?

My Objective: At the moment, I am in the process of developing an AuthUserRole HOC component to manage user roles like Manager and Employee. However, I encountered a tutorial that uses a functional component to return a class component as referenced here. ...

Is there a way to prevent my smartchatbox from covering my fixed top navbar?

Click here for more information I am seeking assistance. Your help is greatly appreciated. The question's heading reveals all you need to know. All you have to do is resize your browser, scroll down, and the answer will become apparent. ...

The function `res.json()` is being called before the for loop has completed its execution

I am facing an issue with my application where the endpoint is supposed to fetch data from a MongoDb Database and return the results to the client. However, I am encountering a problem where an empty array is being sent before my for(){} loop finishes exec ...

Adjusting and arranging multiple thumbnail images within a container of specific width and height

I need a user-friendly method to achieve the following. The thumbnails will not be cropped, but their container will maintain a consistent height and width. The goal is for larger images to scale down responsively within the container, while smaller image ...

Using es6 map to deconstruct an array inside an object and returning it

I am looking to optimize my code by returning a deconstructed array that only contains individual elements instead of nested arrays. const data = [ { title: 'amsterdam', components: [ { id: 1, name: 'yanick&a ...

Although Request.IsAuthenticated is true, Membership.GetUser() returns null

There is an unusual occurrence in our .NET web application that happens very rarely. When repeatedly hitting F5 on a page, Membership.GetUser() will sometimes return NULL even though Request.IsAuthenticated is still true. if (Request.IsAuthenticated) { ...

Incorporating Firefox functionality within a .NET component

As a c# and .net programming beginner, I am curious whether it is possible to use Mozilla Firefox as the default browser for the webBrowser control instead of Internet Explorer. ...

What are some effective ways to utilize localstorage efficiently?

I've been working on creating a variable that stores its value across multiple pages using local storage. However, I've encountered an issue where the variable is not being saved, and there are no error messages to help diagnose the problem. Her ...

Is there a way for me to retrieve the information sent in a jQuery Ajax request?

I'm struggling to understand how to retrieve a value previously submitted to a PHP file using AJAX and jQuery. I'm still in the early stages of learning jQuery, so some concepts are challenging for me. Below is my jQuery code: $('#button2& ...

Automatically fill select dropdowns upon page load with data retrieved from arrays using a combination of jQuery, Ajax, and PHP

My goal is to populate three select boxes simultaneously when the page loads. Each box will contain data from a different array: $cpuArr, $motherboardsArr, and $videocardArr. PHP $cpuArr = file_get_contents('data/cpu.json'); $motherboardsArr = f ...

``Why Is the Northwind.sdf File Not Updating In My Basic Sample Application?

Currently, I am going through the "Demo: Binding Data with the SqlDataSource" module in a Pluralsight video about ASP.NET Webforms by Dan Wahlin. Despite successful database communication, I am facing an issue where updates are not reflected. The only modi ...

Cookie Request has not yet been removed

My webpage has a simple function where users can log in, and depending on whether the cookie exists or not, it will display either their name or a login button. However, I am encountering an issue with unsetting the cookie. I've tried troubleshooting ...

A guide to converting to a specific data type in C#

Seeking guidance on how to make this function properly function. I am supplying the type name and "t" is being populated accurately. However, I am struggling to cast objectToCast to type "t". Any assistance is welcomed. .... Type t = Type.GetType("castToT ...

Unable to retrieve a return value from an asynchronous waterfall function within a node module

A custom node module that utilizes async waterfall is working properly when run independently, but the AJAX callback does not receive the return value. //Node module var boilerplateFn = function(params){ async.waterfall([ function(callback){ ...

One-of-a-kind browser identification for users, no login required

I have an online boutique and I want to enable customers to make purchases without creating an account. To achieve this, I need a way to associate a selected list of items with a user. Initially, I considered using the IP address for this purpose but fou ...