Posting array of objects with MVC Web API

Question

I have a basic post operation that works on a single object of RecordIem. What I would like to do is do the same action but in bulk by posting an array of requests using the same format.

For instance:

public HttpResponseMessage Post(RecordItem request)
{
    var recordItems = _recorder.RecordItem(request);
    return Request.CreateResponse(HttpStatusCode.OK, recordItems);
}

And when I post the Json:

{
    Id : "7UP24fVkGOxSjrcclghe_mP2-po",
    System : 1,
    Environment : "Production"
}

everything works fine. I would like to post Json similar to:

{
    Id : "7UP24fVkGOxSjrcclghe_mP2-po",
    System : 1,
    Environment : "Production"
},
{
    Id : "ClPE188H4TeD2LbQPeV_EzCsKVM",
    System : 1,
    Environment : "Production",
    Label : "RestTest1"
},
{
    Id : "SAWTMJzm-_AFqoNw70-gLeUzB4k",
    System : 1,
    Environment : "Production"
}

And have a method similar to below pick this up:

public HttpResponseMessage Post(RecordItem[] request)
{
    var recordItems = _recorder.RecordItems(request);
    return Request.CreateResponse(HttpStatusCode.OK, recordItems);
}

I've tried using both the [FromBody] and [ModelBinding] attributes on the array and tried using different types (List, IList, IEnumerable) but to no avail. When using [FromBody] the request parameter is null and when using [ModelBinding] the list is empty. I've tried using both and that doesn't work either.

I'd rather not have to having to resort to looping single posts in my client.

Thanks

Oliver Kötter · Accepted Answer · 2014-10-01 11:52:06Z

24

For all that just get an empty array whatever they try, try this:

var request = $.ajax({
  dataType: "json",
  url: "/api/users",
  method: "POST",
  data: { '': postData}
});

The data must be a single anonymous object instead of a raw array.

Info was found here.

answered Oct 1, 2014 at 11:52

Oliver Kötter

1,00611 silver badges30 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

cscott530 Over a year ago

Still an issue as of today for me. Great fix!

Maggie Ying · Accepted Answer · 2013-04-16 17:46:56Z

21

Since your Post expects an RecordItem[], your JSON content in your request body should be in an array as well.

What you have is pretty close -- try adding a pair of square bracket [] around your data:

[{
    Id : "7UP24fVkGOxSjrcclghe_mP2-po",
    System : 1,
    Environment : "Production"
},
{
    Id : "ClPE188H4TeD2LbQPeV_EzCsKVM",
    System : 1,
    Environment : "Production",
    Label : "RestTest1"
},
{
    Id : "SAWTMJzm-_AFqoNw70-gLeUzB4k",
    System : 1,
    Environment : "Production"
}]

answered Apr 16, 2013 at 17:46

Maggie Ying

10.2k2 gold badges37 silver badges37 bronze badges

1 Comment

Mark Pieszak - Trilon.io Over a year ago

This still comes in with a count of 0, not sure how / why it worked for him but looks like this was from over 2 years ago...

Rob · Accepted Answer · 2013-04-16 17:02:48Z

2

It's important that your json contains the request parameter name. A other note: you have to post it as an array.

Your json would look like this:

{
    "request": [
        {
            "Id": "...",
            "System": 1,
            ...
        },
        { ... }
    ]
}

answered Apr 16, 2013 at 17:02

Rob

4,94712 gold badges53 silver badges57 bronze badges

Collectives™ on Stack Overflow

Posting array of objects with MVC Web API

3 Answers 3

1 Comment

1 Comment

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

1 Comment

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related