Pass angular querystring to API controller as C# class by http.get

Question

I am sending request. And i want map parameters to C# class in Asp.Net Core Web.API controller. When i write to my method property name as parameter, it is working. But, i write class then it gave me error like "The input was not valid."

I am sending my request by Postman as "Get"request. My request is http://localhost:5002/api/user/GetUsers?PageFirstIndex=0&IsSortAscending=true&PageSize=10&SortBy=Id

When i wrote like this, it is working and all parameters came with value.

public async Task<ServiceResult> GetUsers(string SortBy, bool IsSortAscending, int Page, byte PageSize)
{...}

But when i wrote like this as class, gave me error "The input was not valid.".

[HttpGet("GetUsers")]
public async Task<ServiceResult> GetUsers(QueryObject queryFilter)
{...}


public class QueryObject
{
   public string SortBy { get; set; }
   public bool IsSortAscending { get; set; }
   public int PageFirstIndex { get; set; }
   public byte PageSize { get; set; }
}

GetUsers([FromUri] QueryObject queryFilter) ... This will work — Mithun Pattankar
– Mithun Pattankar, Commented Aug 17, 2018 at 13:09

Fred · Accepted Answer · 2018-08-17 13:09:31Z

1

You need to use the FromQuery attribute.

public async Task<ServiceResult> GetUsers([FromQuery]QueryObject queryFilter) {}

See the model binding documentation.

answered Aug 17, 2018 at 13:09

Fred

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3 Comments

realist Over a year ago

Fred, Is there any way get rid of all [FromQuery] and [FromBody]? For example all get request [FromQuery] and all post requests [FromBody] by Default. Otherwise, i have to write all get method [FromQuery] @Fred

Fred Over a year ago

If you decorate the controller with the [ApiController] attribute (new in 2.1) it will attempt automatic interference. learn.microsoft.com/en-us/aspnet/core/web-api/…

realist Over a year ago

Thanks a lot. But on the contrary, I remove [ApiController] attribute from my controller and then it worked. @Fred

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