/// <summary>
/// 构造函数
/// </summary>
/// <param name="host">MongoDB 数据库连接主机地址</param>
/// <param name="port">MongoDB 数据库连接端口号</param>
/// <param name="timeout">MongoDB 数据库连接超时时间</param>
/// <param name="dbName">MongoDB 数据库名称</param>
/// <returns>MongoDatabase 实例对象</returns>
public MongoDBHandler(string host, int port, int timeout, string dbName)
{
this.MongoConnectionHost = host;
this.MongoConnectionPort = port;
this.MongoConnectionTimeout = timeout;
this.MongoDatabaseName = dbName;
MongoClientSettings mongoSetting = new MongoClientSettings();
mongoSetting.ConnectTimeout = new TimeSpan(this.MongoConnectionTimeout * TimeSpan.TicksPerSecond);
mongoSetting.Server = new MongoServerAddress(this.MongoConnectionHost, this.MongoConnectionPort);
this.FClient = new MongoClient(mongoSetting);
this.FDatabase = FClient.GetServer().GetDatabase(dbName);
}