Obtaining an IEnumerable from HttpPost - json

Question

I am trying to create an IEnumerable from an HttpPost request.
The JSON in the body reads as follows:
[{"id":15496,"order":0},{"id":15500,"order":1},{"id":15503,"order":2}]
The post request is like so:
[HttpPost("[action]")]
public IActionResult SendReorderRows([FromBody] IEnumerable<ReorderRow> rows){
foreach(var row in rows){
Debug.WriteLine(row.id);
}
}
The referenced class is here:
public class ReorderRow
{
public int id;
public int order;
}
However when I run this example it gives me the
Object reference not set to an instance of an object
error for "rows".
I'm having difficulty finding a basic way to parse JSON and convert it to an IEnumerable for use in the API. Am I missing something straightforward?

Answer 1

Use an array instead.
[HttpPost("[action]")]
public IActionResult SendReorderRows([FromBody] ReorderRow[] rows) {
foreach(var row in rows){
Debug.WriteLine(row.id);
}
}
It will bind to the JSON array.
You also need public properties in the object model in order for them to be properly populated when binding the objects.
public class ReorderRow {
public int id { get; set; }
public int order { get; set; }
}
Reference Model Binding in ASP.NET Core : How model binding works