三、用MongoDB的文档结构描述数据关系

<code>public class UserBLL
{
    public string connectionString = "mongodb://localhost";
    public string databaseName = "myDatabase";
    private Mongo mongo;
    private MongoDatabase mongoDatabase;
    //注意这里泛型类型为“UserInfo”
    private MongoCollection<UserInfo> mongoCollection;
    public UserBLL()
    {
        mongo = GetMongo();
        mongoDatabase = mongo.GetDatabase(databaseName) as MongoDatabase;
        mongoCollection = mongoDatabase.GetCollection<UserInfo>() as MongoCollection<UserInfo>;
        mongo.Connect();
    }
    ~UserBLL()
    {
        mongo.Disconnect();
    }
    /// <summary>
    /// 配置Mongo,将类UserInfo映射到集合
    /// </summary>
    private Mongo GetMongo()
    {
        var config = new MongoConfigurationBuilder();
        config.Mapping(mapping =>
        {
            mapping.DefaultProfile(profile =>
            {
                profile.SubClassesAre(t => t.IsSubclassOf(typeof(UserInfo)));
            });
            mapping.Map<UserInfo>();
        });
        config.ConnectionString(connectionString);
        return new Mongo(config.BuildConfiguration());
    }
}</code>

三、用MongoDB的文档结构描述数据关系

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