accessing c# web assembly from javascript in .net MVC [duplicate]

Question

I need to access some c# code from javascript in MVC ,NET (not blazor). I have the below. This is very specific to .NET and MVC stack and not a generic ajax question like another one in stack overfow. I get no error message it just continues to the next statement after the ajax call. There could be 2 possible issues i think. My url: '/Home/CreatePostcodeFromCoordinates', is wrong. Or my C# assemply is not part of the assembly? or something similar. I am not that experienced with Web techs, I come from a DB background but can't be that difficult to get this link working right? Can't see anything else wrong. Also does the return value from C# need to be some special format or a string (as per now) is ok? this could be another reason? Thank you!

console.log("just before /Home/CreatePostcodeFromCoordinates"); $.ajax({ type: "POST", url: '/Home/CreatePostcodeFromCoordinates', data: { param1: longitude, param2: latitude }, success: function (response) { console.log('success'); console.log(response); }, error: function (error) { console.error(error); } }); 

Answer 1

Finally this is how I managed to fix it:

I am a calling a C# method here in MVC. Make sure your C# method is not declared as static. Just like this. Also I spend probably 8 hours day trying to understand why I could not get any results back. You need the async:false option. Otherwise you will spend similar amount of time if not more!

C#

public string CreateCoordinatesFromPostcode(string postcode) { string result = "XXXXXX" // your logic return result; } 

JavaScript

 let result = ''; $.ajax({ type: "POST", url: '/clib/CreateCoordinatesFromPostcode', async: false, data: { postcode: postcode }, success: function (response) { result = response; }, error: function (error) { console.error(error); } }); console.log("just after /clib/createCoordinatesFromPostcode"); return result;