从mongodb C＃获取密码

Question

我正在尝试创建一种登录方法，我需要从相应的用户那里获取密码。 这是我的数据库层代码：

public int loginUser(string userName, string pass)
    {
        int result = 0;
        var credentials = MongoCredential.CreateMongoCRCredential("SearchForKnowledge", userName, pass);
        var settings = new MongoClientSettings
        {
            Credentials = new[] { credentials }
        };
        try
        {
            var mongoClient = new MongoClient(settings);
            var database = mongoClient.GetDatabase("SearchForKnowledge");
            var coll = database.GetCollection<BsonDocument>("Users");

            var filter = Builders<BsonDocument>.Filter.Eq("userName", userName);
            var query = coll.Find(filter);
            //??????????
        }
        catch (Exception ex) {
            result = 0;
        }
        return result;
    }

如您所见，如果登录成功，则尝试返回1；如果失败，则返回0（用于重定向）。 我正在努力检查用户名是否与设置的密码匹配。 此刻，我刚刚创建了一个过滤器，并将其传递给了Find方法，并且此时此刻，我死定了。 如何从mongodb返回该用户的密码，并将其与作为参数传递的密码进行比较？

Answer 1

尝试这样的事情：

public int loginUser(string userName, string pass)
    {
        int result = 0;
        //Here you use credentials for the connection, not the one passed
        //to the method:
        var credentials = MongoCredential.CreateMongoCRCredential("SearchForKnowledge", connectionUsername, connectionPass);
        var settings = new MongoClientSettings
        {
            Credentials = new[] { credentials }
        };
        try
        {
            var mongoClient = new MongoClient(settings);
            var database = mongoClient.GetDatabase("SearchForKnowledge");
            var coll = database.GetCollection<BsonDocument>("Users");

            var filter = Builders<BsonDocument>.Filter.Eq("userName", userName);
            var result = await coll.Find(filter).ToListAsync().First();
            if(result["Password"] == pass)
            {
               result = 1;
            }
        }
        catch (Exception ex) {
            result = 0;
        }
        return result;