The following errors were detected during validation.\r\n - model is null

            var data = { 'Id': ctrl.id };
            $http.delete('../api/Provider', data)

…

        [HttpDelete]
        public IHttpActionResult DeleteProvider(Identificator model)
        {

…

    public class Identificator
    {
        public long Id { get; set; }

return mentioned error

                var data = { 'Id': ctrl.id, 'Name': ctrl.name, 'Email': ctrl.email, 'Guid': ctrl.guid };
                $http.put('../api/Provider', data)

works

[hikalkan]

Please check logs to see the error.

[dsalodki]

hikalkan Thank you for advise. Solution was

                $http({
                    method: 'DELETE',
                    url: '../api/Provider',
                    headers: {
                        'Content-Type': 'application/json'
                    },
                    data: { Id: ctrl.id }
                })

I have added header and [DisableValidation] [HttpDelete] public IHttpActionResult DeleteProvider([FromBody]ProviderListDto data) {