API Action - The value '1,2' is not valid

Question

Using Asp.Net Core 2.2 I am calling an API using:

products?productsIds=1,2&offset=10&limit=4

But I get the error on model binding for productsIds:

The value '1,2' is not valid.

I tried with productsIds=1 and in that case it works.

And Offset and Limit also get the correct values ...

The API model and action are:

public class Request {
  public IList<Int32> ProductsIds { get; set; }
  public Int32 Limit { get; set; }
  public Int32 Offset { get; set; }
}

[ApiController]
public class ProductController : ControllerBase {

  [HttpGet("products")]
  public async Task<IActionResult> Get([FromQuery]Request request) {
    // Action code
  }

}

What am I missing?

Update

This is not similar to this Question as the solution proposed in that question uses [FromUri].

The attribute [FromUri] is not available in ASP.NET Core 2.2 ApiController (Microsoft Docs).

You mean other parameters? Yes there is and they assume the correct values. I added some more information to may question. In fact if I use `productsIds=1` then it works. — Miguel Moura, May 17 '19 at 09:55
Can you try HttpContext.Request.Query["ProductsIds"] to see if work ? — Tony Ngo, May 17 '19 at 10:03
Try this link https://stackoverflow.com/questions/41577376/how-to-read-values-from-the-querystring-with-asp-net-core — Tony Ngo, May 17 '19 at 10:11

score 1 · Answer 1 · answered May 17 '19 at 10:12

1

Try this you can use HttpContext.Request.Query to get a params

like this

HttpContext.Request.Query["ProductsIds"]

answered May 17 '19 at 10:12

Tony Ngo

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But I do not wan to use HttpContext.Request.Query["ProductsIds"] ... I want the binding to be done automatically and I don't understand why ASP.NET core don't bind a simple List of Ints. – Miguel Moura May 17 '19 at 10:15
I understand but as I know the FromQuery can't get the array so you have to use this way – Tony Ngo May 17 '19 at 10:15

score 1 · Answer 2 · answered May 17 '19 at 10:15

1

If you want to pass List as GET param use the following query

products?productsIds=1&productsIds=2

answered May 17 '19 at 10:15

Bohdan Stupak

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API Action - The value '1,2' is not valid

2 Answers2