Ng-file-upload: Sending array to Web Api

Question

Using angularjs 1.3 and C# .net core web api

I have a ng-file-upload which being used to upload file. When the upload method is called I want to pass in an extra array of some data to the upload method which is then received by the method at my web api. Here is my ng-file-upload

factory.upload = function (file, myArray) {
    var url = '{0}upload'.format(apiPath)
    return Upload.upload({
        url: url,
        arrayKey: '',
        data: { file: file, myArray: myArray}
    }).then(function (res) {

        return res;
    });
};

Below is my webapi:

  [HttpPost("upload")]
   public async Task<IActionResult> FileUpload(IFormFile file, List<string> myArray)
   {
        //code
   }

And finally here is the array which I am trying to pass along with upload to my webapi:

  [
   {
     id: "1",
     name: "steve"
   },
   {
     id: "2",
     name: "adam"
   }
  ]

The issue is in my webapi, the myArray parameter which is to accept the array from the UI is always null. I searched online and its mentioned to add

 arrayKey: '' 

But still doesnt works. Any inputs?

---Updated---

I created a string array as :

var cars = ["steve", "adam", "ronnie"];

And updated my api as:

List<ArrayItem> myArray

The above code works. So looks like there is issue with array being passed. I am passing the following array by creating like this:

  var myArray= [];
  for (var i = 0; i < myJson.length; i++) {
   myArray.push({
    id: myJson[i].id,
    name: myJson[i].name,
  });                                        
 }  

The result of above as seen in console:

Array(2)
0:{id: "1", name: "steve"}
1:{id: "2", name: "adam"}

Whats missing here?

Answer 1

For passing object array, you need to define the list object to accept the parameters.

1. ArrayItem with Id/Name properties.

   public class ArrayItem
   {
   public int Id { get; set; }
   public string Name { get; set; }
   }
   

2. Change action

       public async Task<IActionResult> FileUpload(IFormFile file, List<ArrayItem> myArray)
   {
       return Ok();
   }          
   

Update

You need to remove arrayKey: '[]', try code below:

app.service('crudService', function ($http, Upload) {

var baseUrl = 'http://localhost:50829';

this.uploadFile = function (file, array) {

    return Upload.upload({
        url: baseUrl + "/api/books/file/upload",
        //arrayKey: '[]',
        data: { file: file, array: array },
        headers: { 'Content-Type': 'application/x-www-form-urlencoded' }
    }).then(function (res) {

        return res;
    }, function (err) {

        throw err;
    });
}; 
});