MongoDB 地理空间搜索和官方 C# 驱动程序

使用 MongoDB 地理空间搜索和官方 C# 驱动程序

csharp
var collection = database.GetCollection("locations");
var indexKeysDefinition = Builders.IndexKeys.Geo2DSphere("loc");
collection.Indexes.CreateOne(indexKeysDefinition);

csharp
var filter = Builders.Filter;
var query = filter.Near("loc", new GeoJsonPoint(longitude, latitude), maxDistance);
var result = collection.Find(query).ToList();

csharp
using MongoDB.Bson;
using MongoDB.Driver;
using MongoDB.Driver.GeoJsonObjectModel;
using System;
namespace GeoSpatialSearchDemo
{
    class Program
    {
        static void Main(string[] args)
        {
            var client = new MongoClient("mongodb://localhost:27017");
            var database = client.GetDatabase("test");
            var collection = database.GetCollection("locations");
            var indexKeysDefinition = Builders.IndexKeys.Geo2DSphere("loc");
            collection.Indexes.CreateOne(indexKeysDefinition);
            var filter = Builders.Filter;
            var query = filter.Near("loc", new GeoJsonPoint(longitude, latitude), maxDistance);
            var result = collection.Find(query).ToList();
            foreach (var document in result)
            {
                Console.WriteLine(document);
            }
        }
    }
}