.NET type DevExtreme.AspNet.Data.Types.AnonType cannot be mapped to a BsonValue.

[alejackiu]

Hi,
I'm trying to use total summary in DataGrid using mongodb and it's throwing this error ".NET type DevExtreme.AspNet.Data.Types.AnonType cannot be mapped to a BsonValue.". I didnt find how to overcome this error.

[AlekseyMartynov]

Reproduced.

Internal notes:

• Use AllowEmpty = false for Mongo at
  

  DevExtreme.AspNet.Data/net/DevExtreme.AspNet.Data/DataSourceLoadContext.cs

  Line 47 in 4cfd796

  AllowEmpty = !_providerInfo.IsL2S,

• GroupSummary without Group and without TotalSummary should not perform any aggregation.
• Notify T900956 when fixed

[AlekseyMartynov]

Workaround:

BsonTypeMapper.RegisterCustomTypeMapper(
    Type.GetType("DevExtreme.AspNet.Data.Types.AnonType, DevExtreme.AspNet.Data"),
    new DevExtremeAspNetDataAnonTypeMapper()
);

class DevExtremeAspNetDataAnonTypeMapper : ICustomBsonTypeMapper {
    public bool TryMapToBsonValue(object value, out BsonValue bsonValue) {
        bsonValue = new BsonDocument();
        return true;
    }
}

[alejackiu]

Thanks, that works.