MongoDb .net Official Driver 一些用法

BsonClassMap.RegisterClassMap<NetWorth>(cm =>
{
cm.AutoMap();
cm.MapIdField(n => n.TradingDay);
});

var b = Builders<NetWorth>.Filter;
var filter = b.Gte("_id", begin) & b.Lte("_id", end);
var sort = Builders<NetWorth>.Sort.Ascending("_id");
vt = col.Find(filter).Sort(sort).ToList();

var b = Builders<NetWorth>.Filter;
var filter = b.Gte("_id", begin) & b.Lte("_id", end);
var sort = Builders<NetWorth>.Sort.Ascending("_id");
var p = Builders<NetWorth>.Projection.Include("_id");
vtBsonDocument = col.Find(filter).Project(p).Sort(sort).ToList();
vtId = col.Find(filter).Project(x=>x._id).Sort(sort).Limit(1).ToList()