{
     name: "MongoDB",
     type: "database",
     count: 1,
     info: {
         x: 203,
         y: 102
     }
}

show dbs

db

use {數(shù)據(jù)庫名稱}

show collections
# 或
show tables

# MyCollection 是集合名稱
db.getCollection("MyCollection").find()
db.getCollection("MyCollection").find().limit(1000).skip(0)

{
     name: "MongoDB",
     type: "database",
     count: 1,
     info: {
         x: 203,
         y: 102
     }
}

{
     name: "MongoDB",
     typeName: "database",
     dataCount: 1,
     dataInfo: {
         m: 203,
         n: 102
     }
}

            var client = new MongoClient("mongodb://{MongoDB}:27017");
            IMongoDatabase database = client.GetDatabase("Test");

await database.CreateCollectionAsync("Test");

IMongoCollection<TDocument> GetCollection<TDocument>()

    public class Test1
    {
        public string Name { get; set; }
    }

    public class Test2
    {
        public string DataType { get; set; }
    }

            var collection1 = database.GetCollection<Test1>("Test");
            var collection2 = database.GetCollection<Test2>("Test");

            collection1.InsertOne(new Test1 { Name = "Test1" });
            collection2.InsertOne(new Test2 { DataType = "Test2" });
			// await collection.InsertOneAsync(object);

            Test1[] datas = new Test1[]
            {
                new Test1 { Name = "Test1" }
            };
            collection1.InsertMany(datas);

collection1.CountDocuments(new BsonDocument())
// await collection1.CountDocumentsAsync(new BsonDocument());

            var collection1 = database.GetCollection<Test1>("Test");
            collection1.CountDocuments(new BsonDocument())

        public ObjectId _id { get; set; }

Console.WriteLine(JsonSerializer.Serialize(document));

var document = collection1.Find(new BsonDocument()).FirstOrDefault();

            var documents = await collection1.Find(new BsonDocument()).ToListAsync();
            foreach(var item in documents)
            {
                Console.WriteLine(JsonSerializer.Serialize(item));
            }

var documents = collection1.Find(new BsonDocument()).ToList();
var documents = await collection1.Find(new BsonDocument()).ToListAsync();

            List<Test1> tests = new List<Test1>();
            Action<Test1> action = item =>
            {
                tests.Add(item);
                Console.WriteLine(JsonSerializer.Serialize(item));
            };

            await collection1.Find(new BsonDocument()).ForEachAsync(action);

var list = collection1.Find(new BsonDocument()).ToCursor().ToEnumerable();

5f8bdf88e63d14cb5f01dd85	小明	19
5f8bdf88e63d14cb5f01dd86	小紅	20
5f8bdf88e63d14cb5f01dd87	小張	16
5f8bdf88e63d14cb5f01dd88	小小	17
    
# -----插入數(shù)據(jù)的代碼-----
    public class Test
    {
        public ObjectId _id { get; set; }
        public string Name { get; set; }
        public int Age { get; set; }
    }

            var datas = new Test[]
            {
                new Test{ Name="小明",Age=19},
                new Test{ Name="小紅",Age=20},
                new Test{ Name="小張",Age=16},
                new Test{ Name="小小",Age=17}
            };

            collection.InsertMany(datas);

FilterDefinition<Test> filter = Builders<Test>.Filter

FilterDefinition<Test> filter = filterBuilder.Where(item => item.Age >= 18);

Test[] documents = collection.Find(filter).ToEnumerable<Test>().ToArray();

		// 條件過濾
        public static FilterDefinitionBuilder<TDocument> Filter { get; }

		// 索引過濾
        public static IndexKeysDefinitionBuilder<TDocument> IndexKeys { get; }

		// 映射器，相當(dāng)于使用 Linq 的 .Select() 查詢自己只需要的字段
        public static ProjectionDefinitionBuilder<TDocument> Projection { get; }

		// 排序，創(chuàng)建排序規(guī)則，如工具年齡排序
        public static SortDefinitionBuilder<TDocument> Sort { get; }

		// 更新，更新某些字段的值等
        public static UpdateDefinitionBuilder<TDocument> Update { get; }

class Person
{
    [BsonElement("fn")]
    public string FirstName { get; set; }

    [BsonElement("ln")]
    public string LastName { get; set; }
}