The SDK that does all the Gets, Puts, Posts etc... is a PCL. As such, I can't install Entity Framework.
A basic get using Postman returns the following data in regards to DbGeography.
"GeoLocation": {
"$id": "6",
"Geography": {
"$id": "7",
"CoordinateSystemId": 4326,
"WellKnownText": "POINT (-98.7687222 32.8494985)"
}
},
Since I can't install Entity Framework, I've attempted to create my own DbGeography and DbGeographyWellKnownValue.
The API call I'm making from the app should return 4 complete records. Instead once the Json is deserialized, it returns 1 complete record and 3 null records. I assume this has something to do with the DbGeography field. I've tried adding [JsonIgnore], but this still doesn't get 4 complete records. Here are my Location, DbGeography, DbGeographyWellKnownValue and DbGeographyConverter classes.
Location
[JsonProperty("GeoLocation")]
[JsonConverter(typeof(DbGeographyConverter))]
public DbGeography GeoLocation { get; set; }
DbGeography
public class DbGeography
{
public DbGeographyWellKnownValue Geography { get; set; }
/// <summary>
/// Custom FromText method
/// </summary>
/// <param name="wellKnownText"></param>
/// <param name="coordinateSystemId"></param>
/// <returns></returns>
public static DbGeography FromText(string wellKnownText, int coordinateSystemId)
{
DbGeography Geography = new DbGeography()
{
Geography = new DbGeographyWellKnownValue()
{
WellKnownText = wellKnownText,
CoordinateSystemId = coordinateSystemId,
}
};
return Geography;
}
}
DbGeographyWellKnownValue
public class DbGeographyWellKnownValue
{
/// <summary>
/// The coordinate ID
/// </summary>
public int? CoordinateSystemId { get; set; }
/// <summary>
/// Optional.
/// </summary>
//public string WellKnownBinary { get; set; }
/// <summary>
/// The WellKnownText value
/// </summary>
public string WellKnownText { get; set; }
}
And finally, I have a DbGeographyConverter class.
public class DbGeographyConverter : JsonConverter
{
public override bool CanConvert(Type objectType)
{
//return objectType.IsAssignableFrom(typeof(string));
return objectType.Equals(typeof(DbGeography));
//return objectType.Equals(typeof(string));
}
public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
//Handles issue with null DbGeography values
if (reader.TokenType == JsonToken.Null)
return default(DbGeography);
JObject location = JObject.Load(reader);
JToken token = location["Geography"]["WellKnownText"];
JToken token2 = location["Geography"]["CoordinateSystemId"];
string point = token.ToString();
int coordinateId = Convert.ToInt32(token2.ToString());
//If value is null lets return the default
if (point == null)
return default(DbGeography);
//If we get to here lets convert
var converted = DbGeography.FromText(point, coordinateId);
return converted;
//Can't convert, return NULL
//return default(DbGeography);
}
public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
{
// Base serialization is fine
serializer.Serialize(writer, value);
//Handle null values
//var dbGeography = value as DbGeography;
//serializer.Serialize(writer, dbGeography == null || dbGeography.IsEmpty ? null : value);
//serializer.Serialize(writer, dbGeography == null ? null : value);
}
}
This all works perfectly in my MVC 5 Web App and works with the same API, so I know it has something to do with the DbGeography field.
Any help is much appreciated. Thanks!