# Elasticsearch.net help with mapping - C#

**URL:** <https://discuss.elastic.co/t/elasticsearch-net-help-with-mapping-c/194973>\
**Category:** Elasticsearch\
**Created:** [August 13, 2019, 7:43am UTC](https://discuss.elastic.co/t/elasticsearch-net-help-with-mapping-c/194973 "2019-08-13T07:43:44Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![Bluesky](https://avatars.discourse-cdn.com/v4/letter/b/e47c2d/32.png) [@Bluesky](https://discuss.elastic.co/u/Bluesky)\
**Post date:** [August 13, 2019, 7:43am UTC](https://discuss.elastic.co/t/elasticsearch-net-help-with-mapping-c/194973/1 "2019-08-13T07:43:44Z")

</div>

Hey there.

I've a problem when i'm trying to mapping the following DSL query, in Visual Studio using [Elasticsearch.net](http://Elasticsearch.net)

```
{
"_source": {
"includes": [
"Vrvirksomhed.cvrNummer",
"Vrvirksomhed.virksomhedMetadata.nyesteNavn.navn",
"Vrvirksomhed.virksomhedMetadata.nyesteBeliggenhedsadresse"
]
},
"query":{
  "multi_match" : {
     "query": "a",
     "fields": ["Vrvirksomhed.cvrNummer", "Vrvirksomhed.virksomhedMetadata.nyesteNavn.navn"]
   }
  },
  "size":2
}

```

Here are its results:

```
"hits": {
    "total": 30018,
    "max_score": 7.6565695,
    "hits": [
        {
            "_index": "cvr-v-20181028",
            "_type": "_doc",
            "_id": "4001731906",
            "_score": 7.6565695,
            "_source": {
                "Vrvirksomhed": {
                    "cvrNummer": 31903394,
                    "virksomhedMetadata": {
                        "nyesteNavn": {
                            "navn": "A//A"
                        },
                        "nyesteBeliggenhedsadresse": {
                            "vejkode": 6378,
                            "fritekst": null,
                            "adresseId": "0a3f509d-13a3-32b8-e044-0003ba298018",
                            "vejnavn": "Sigynsgade",
                            "bogstavTil": null,
                            "conavn": "Anders Andersen",
                            "bogstavFra": null,
                            "periode": {
                                "gyldigFra": "2016-02-02",
                                "gyldigTil": "2019-03-31"
                            },
                            "kommune": {
                                "sidstOpdateret": "2006-11-13T00:00:00.000+01:00",
                                "kommuneNavn": "KØBENHAVN",
                                "kommuneKode": 101,
                                "periode": {
                                    "gyldigFra": "2007-01-01",
                                    "gyldigTil": null
                                }
                            },
                            "husnummerFra": 41,
                            "postboks": null,
                            "sidstOpdateret": "2019-03-31T15:10:25.000+02:00",
                            "postnummer": 2200,
                            "etage": "4",
                            "bynavn": null,
                            "husnummerTil": null,
                            "sidedoer": "th",
                            "landekode": "DK",
                            "sidstValideret": "2017-09-16T13:13:58.703+02:00",
                            "postdistrikt": "København N"
                        }
                    }
                }
            }
        }

```

Here is my code in C#:

Mapping classes

```
public class Vrvirksomhed
{
    public string cvrNummer { get; set; }
    public VirksomhedMetadata virksomhedMetadata { get; set; }
}

public class VirksomhedMetadata
{
    public NyesteNavn nyesteNavn { get; set; }
    public NyesteBeliggenhedsadresse nyesteBeliggenhedsadresse { get; set; }
}

public class NyesteNavn
{
    public string navn { get; set; }
}

```

and so on...

Client response script:

```
var searchResponse1 = client.Search<Vrvirksomhed>(s => s
            .Source(src => src
                .Includes(i => i
                    .Fields(
                        f => f.cvrNummer,
                        f => f.virksomhedMetadata.nyesteNavn.navn,
                        f => f.virksomhedMetadata.nyesteBeliggenhedsadresse
                     )
                )
            )
            .Query(q => q
                .MultiMatch(mm => mm
                    .Fields(mf => mf
                        .Field(mv => mv.cvrNummer)
                        .Field(mv => mv.virksomhedMetadata.nyesteNavn.navn)
                    )
                    .Query(searchInput)
                )
            )
            .Size(takeItems)
        );

```

It returns 0 hits, but when i change the type to dynamic it gets the hits as expected.

```
        var searchResponse2 = client.Search<dynamic>(s => s
            .Source(src => src
                .Includes(i => i
                      .Fields(
                        "Vrvirksomhed.cvrNummer",
                        "Vrvirksomhed.virksomhedMetadata.nyesteNavn.navn",
                        "Vrvirksomhed.virksomhedMetadata.nyesteBeliggenhedsadresse"
                     )
                )
            )
            .Query(q => q
                .MultiMatch(mm => mm
                    .Fields(mf => mf
                        .Field("Vrvirksomhed.cvrNummer")
                        .Field("Vrvirksomhed.virksomhedMetadata.nyesteNavn.navn")
                    )
                    .Query(searchInput)
                )
            )
            .Size(takeItems)
        );

```

Any idea what i'm doing wrong here?

Thanks for your help.

---

<div class="post-metadata">

**Author:** ![forloop](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/forloop/32/9021_2.png) [@forloop](https://discuss.elastic.co/u/forloop)\
**Post date:** [August 15, 2019, 8:35am UTC](https://discuss.elastic.co/t/elasticsearch-net-help-with-mapping-c/194973/2 "2019-08-15T08:35:44Z")

</div>

If you [capture the request to Elasticsearch](https://www.elastic.co/guide/en/elasticsearch/client/net-api/current/logging.html), do the query JSON and the API endpoint **match exactly** what you expect, and are the same as in the case where you use `dynamic`?

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [September 12, 2019, 8:35am UTC](https://discuss.elastic.co/t/elasticsearch-net-help-with-mapping-c/194973/3 "2019-09-12T08:35:52Z")

</div>

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