C# not getting data from Ajax

I have a problem sending ajax data from my javascript file to my c# controller. I get a "bad request error" in my c# program, and the reason i get that is because the data parameter "result" which i am sending with ajax is not getting received by c# and the c# variable stays null. I know Ajax is routing to the correct controller since it is calling the method, but the variable "result" is not getting received by c# for some reason.

Here is my ajax request.

$.ajax({
   type: 'POST',
   contentType: 'application/x-www-form-urlencoded; charset=UTF-8',
   data: { 'result' : result },
   url: "https://localhost:44374/api/task",
   cache: false,
   success: function (data) {
   // Process the received data.
   }
});

Here is my c# controller

    [HttpPost]
    public ActionResult<string> Get(string result)
    {
        string id = result;
        getTaskContent(id);
        return id;
    }

After changing Ajax to GET, the program works and the output is:

Microsoft.AspNetCore.Hosting.Internal.WebHost:Information: Request starting HTTP/1.1 GET http://localhost:44374/api/task/1108164994166723?_=1549876832637 application/x-www-form-urlencoded; charset=UTF-8 
Microsoft.AspNetCore.Hosting.Internal.WebHost:Information: Request finished in 17.8526ms 404 

But for some reason the C# Actionresult method is not getting executed.

See that the URL is localhost:44374/api/task/1108164994166723?_=1549876832637, where the result variable is 1108164994166723, what I have no idea about is how the ?_=1549876832637 part is coming. If I alert the result variable in the window it is only 1108164994166723

Solution

The combination of changing to GET instead of POST and the changing URL in Ajax to url: "localhost:44374/api/task?result=" + result, did the job.

Correct Ajax code is:

$.ajax({
   type: 'GET',
   contentType: 'application/x-www-form-urlencoded; charset=UTF-8',
   url: "https://localhost:44374/api/task?result=" + result
});

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Link to original article：https://stackoverflow.com/questions/54626819/c-sharp-not-getting-data-from-ajax