Mongodb、linq 驱动程序。如何用变量或语句构造Contains

使用MongoDB和LINQ驱动程序构造Contains查询

Install-Package MongoDB.Driver
Install-Package MongoDB.Driver.Linq

csharp
var builder = Builders.Filter;
var filter = builder.In(x => x.PropertyName, new[] { "value1", "value2", "value3" });
var result = collection.Find(filter).ToList();

csharp
using MongoDB.Driver;
using MongoDB.Driver.Linq;
using System;
using System.Collections.Generic;
namespace MongoDBContainsExample
{
    class Program
    {
        static void Main(string[] args)
        {
            // 创建MongoDB客户端
            var client = new MongoClient("mongodb://localhost:27017");
            // 获取数据库
            var database = client.GetDatabase("test");
            // 获取集合
            var collection = database.GetCollection("mycollection");
            // 构造Contains查询
            var builder = Builders.Filter;
            var filter = builder.In(x => x.PropertyName, new[] { "value1", "value2", "value3" });
            // 执行查询
            var result = collection.Find(filter).ToList();
            // 输出结果
            foreach (var item in result)
            {
                Console.WriteLine(item);
            }
        }
    }
    // 定义实体类
    public class MyClass
    {
        public string PropertyName { get; set; }
    }
}