Send nested objects to asp.net core Get method

Question

I have the following model objects

[DataContract]
public class Filter
{
    [DataMember (Name ="start")]
    public int Start { get; set; }

    [DataMember (Name="rows")]
    public int Rows { get; set; }

    [DataMember(Name = "geoloc")]
    public GeoLocationModel GeoLocation { get; set; }

}

[DataContract]
public class GeoLocationModel
{
    [DataMember(Name = "lat")]
    public double Latitude { get; set; }

    [DataMember(Name = "lng")]
    public double Longitude { get; set; }
}

and the following action

    [HttpGet]
    public async Task GetCities([FromQuery]Models.Filters.Filter filters)
    {
        //some code
    }

When I call my action with the following query (query generated by axios):

   /api/cities/?start=0&rows=5&geoloc=%7B%22lat%22:44,%22lng%22:3%7D

Parameters Start and Rows are filled correctly but GeoLoc is null.

How do I need to format my query to satisfy FromQuery Attribute?

I also would suggest post but as an add-on you could set a hidden field with the JSON value of your complex model and post it back as a string. On your controller action just have a string parameter, get the JSON and deserialize it. — TSungur
– TSungur, Commented Sep 12, 2019 at 18:07
Try /api/cities/?start=0&rows=5&geoloc.lat=44&geoloc.long=3 — Chetan
– Chetan, Commented Sep 13, 2019 at 2:55
@TonyNgo I know I could use a POST, but it's a query to retrieve objects without modify them so it should be a GET — Rémy
– Rémy, Commented Sep 13, 2019 at 6:40

Rena · Accepted Answer · 2019-09-13 07:46:31Z

3

You could try url like:/api/cities?start=4&rows=5&geoloc.Latitude=4&geoloc.Longitude=3

edited Sep 13, 2019 at 7:46

answered Sep 13, 2019 at 7:34

Rena

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5 Comments

Rémy Over a year ago

It doesn't work But it works if I use /api/cities?start=4&rows=5&geolocation.Latitude=4&geolocation.Longitude=3 It means that FromQueryAttribute doesn't take in account DataMember attributes :(

Rena Over a year ago

Yes.Did you change the model?Actually your property name is geoloc not geolocation in your question.

Rémy Over a year ago

oh sorry for the mistake, my property name is GeoLocation

Rena Over a year ago

So this thread seems to be resolved.If you really want to use DataMember attributes,I suggest that you could mark this thread to close it and ask a new thread with posting necessary code.

Rémy Over a year ago

This is not completly resolved because I would like to use my datamember names.

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