When attempting to execute an Ajax call from a MVC Razor view that is not the Index.cshtml file,

I am facing a dilemma with my Ajax call - it succeeds when invoked from an Index view but fails when called from a different view. The scenario is within an ASP .NET MVC 4 project where I utilize Javascript for Ajax requests. To keep my code organized, I have segregated the complex Javascript/JQuery functions into separate files. Here's a snippet from one of these JS files where I initiate an Ajax request:

//to be executed in the JQuery page load function
function initialize(){
    $.ajax({ url: MyController/GetData, async: false })
        .done(function(returnedData) {
            doStuff(returnedData);
        });
}

In my Home controller, I crafted a new View named Index.cshtml. Within this view, I linked the external Javascript file containing the aforementioned function. Upon accessing my /Home page (routed to Home/Index due to default routing setup), the initialize() function executes and the Ajax call is successful.

Subsequently, I designed another view titled Details.cshtml and similarly referenced the same Javascript file. However, upon navigating to /Home/Details, the initialize() function is triggered but the Ajax call fails. An error message indicates that it sought

/Home/Details/MyController/GetData
, which does not exist.

The perplexing aspect is the inconsistency, where the same call thrives on one page and falters on another. This leads to my queries:

  1. What could possibly explain this disparity?
  2. Is there a potential solution to rectify this issue?

It's worth noting that suggestions to use Url.Action(...) for constructing URLs are typically advised in similar scenarios, however, I've deliberately separated my Javascript from Razor Views. Furthermore, the puzzling part remains why it functions flawlessly only on the Index page.

Thanks for your assistance.

UPDATE: Below is the RouteConfig file defined:

public class RouteConfig
{
    public static void RegisterRoutes(RouteCollection routes)
    {
        routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
        routes.IgnoreRoute("favicon.ico");

        routes.MapRoute(
            name: "Default", 
            url: "{controller}/{action}/{id}",
            defaults:new { controller = "Home", action = "Index", id = UrlParameter.Optional }
            );
    }
}

Note: This peculiar behavior is not confined to just Home/Index or Home/Details. It has been observed that the Ajax call performs well from AnyController/Index but malfunctions when summoned from AnyController/AnyOtherPage.

Answer №1

When determining the effectiveness of your routing, consider implementing the following adjustment (add a slash before MyController):

function initialize(){
    $.ajax({ url: /MyController/GetData, async: false })
        .done(function(returnedData) {
            doStuff(returnedData);
        });
}

To enhance functionality, specify whether it is a get or post request, as well as the intended data type. Mvc works well with Json:

function initialize(){
    $.ajax({ url: /MyController/GetData, async: false, dataType:"json", type:"Get" })
        .done(function(returnedData) {
            doStuff(returnedData);
        });
}

The reason this solution may work on the index page is because details need to be displayed in the url for it to function properly. However, the index does not require this. Therefore, while Home/Index functions correctly, Home/ should also suffice. On the other hand, for displaying details, the url must be formatted as Home/Details.

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