Mongo DB $在c＃附近查询？

Question

var query ="{'Geo':{'$near': {'$geometry': {'type': 'Point' ,'coordinates':[]} }}}";
var parsing = BsonDocument.Parse(query);
var qwithcoor = parsing["Geo"]["$near"]["$geometry"]["coordinates"].AsBsonArray;
qwithcoor.AddRange(coordinates);
parsing["Geo"]["$near"].AsBsonDocument.Add("$maxDistance", radius);

var collection = database.GetCollection<BsonDocument>("mycollection");
var documents = await collection.Find(parsing).ToListAsync();

我想用Builders<BsonDocument>.Filter执行此操作。像这样：

var query=Builders<BsonDocument>.Filter.Near();
var documents=await collection.Find(query).ToListAsync();

我在过滤器后使用Near吗？什么是近参数？

Answer 1

我用

解决了这个问题

var gp =new GeoJsonPoint<GeoJson2DGeographicCoordinates>(new GeoJson2DGeographicCoordinates(coordinates[0], coordinates[1]));
var query=Builders<BsonDocument>.Filter.Near("Geo",gp,radius);
var result = await col.Find(query).ToListAsync();