從mongodb C＃獲取密碼

Question

我正在嘗試創建一種登錄方法，我需要從相應的用戶那里獲取密碼。 這是我的數據庫層代碼：

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;
    }

如您所見，如果登錄成功，則嘗試返回1；如果失敗，則返回0（用於重定向）。 我正在努力檢查用戶名是否與設置的密碼匹配。 此刻，我剛剛創建了一個過濾器，並將其傳遞給了Find方法，並且此時此刻，我死定了。 如何從mongodb返回該用戶的密碼，並將其與作為參數傳遞的密碼進行比較？

Answer 1

嘗試這樣的事情：

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;