ASP.net MVC Controller receiving null array when sending from Ajax

Question

I've been at this for what seems like days now. This should be so simple. Why isn't this working? My URL looks like this:

https://example.com/photos/gallery/c15905d7-8216-4e81-ac15-2fafd10b49e8/80515cad-070a-4d61-a7e3-f2dbb1968c9d

I want to send c15905d7-8216-4e81-ac15-2fafd10b49e8 & 80515cad-070a-4d61-a7e3-f2dbb1968c9d to my controller.

Here is the last thing I've tried (of 20748 attempts):

function setViewed() {
    var pathArray = window.location.pathname.split('/');

    $.ajax({
        type: "PUT",
        url: '/api/Customers/',
        data: { 'pathArray': pathArray },
        dataType: "json",
        traditional: true,
        success: function (response) {
            alert(response.msg);
        }
    });
}

Controller:

[HttpPut]
public IHttpActionResult SeenIt(List<String> pathArray)
{

    // Don't update if it's the client looking at a customer's gallery:
    if (pathArray[3] == User.Identity.GetUserId()){
        return Json(new
        {
            msg = String.Format("ClientID: {0} | CustomerID: {1}", pathArray[3], pathArray[4])
        });
    }

    var customer = db.Customers.FirstOrDefault(c => c.CustomerID == Guid.Parse(pathArray[4]));
    customer.Accessed = true;

    db.SaveChanges();
    return Json(new
    {
        msg = String.Format("ClientID: {0} | CustomerID: {1}", pathArray[3], pathArray[4])
    });
}

My array is always null. Is there a better/easier/more efficient way to do this? One that works? Thanks!

Jerdine Sabio · Accepted Answer · 2020-04-03 15:56:52Z

1

Option 1

In your ajax call, no need to wrap the list string with {}. Simply use;

data:pathArray

Option 2

Make a class that would serve as the model where the properties would be bound.

public class ReceiveModel{
   public List<string> pathArray {get;set;}
}

Then in your controller

public IHttpActionResult SeenIt(ReceiveModel model)
{
   ...
}

answered Apr 3, 2020 at 15:56

Jerdine Sabio

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4 Comments

flashsplat Over a year ago

Thanks. I just tried both and got the same result. the model and/or array arrive null :(.

flashsplat Over a year ago

Oh wait, i switched the jquery back to ` { 'pathArray': pathArray }` and I think it's working! By Golly..

Jerdine Sabio Over a year ago

@flashsplat haha! is that option 2 where it's working?

flashsplat Over a year ago

Yesir! I've got other problems now but i'll sort that out. Atleast ive got the data in the controller now. Thank you very much!

General Grievance · Accepted Answer · 2023-05-01 12:40:47Z

0

I know this is an old post but for anyone using ajax to post versus straight JS I found that adding this helped:

contentType: "application/json; charset=utf-8",

edited May 1, 2023 at 12:40

General Grievance

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answered Apr 24, 2023 at 17:15

Yaniv

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