list浅析

1.list会不上线的增加,增加硬件内存,需要剔除数据:

  

List<int> erf = new List<int> {1,2,3,4,5 };
                if (erf.Count>3)
                {
                    erf.RemoveAt(0);
            //erf.RemoveRange(0,2); }

  

2.remove不能移除类或者数组等格式数据,否则会报错false、

static List<ZLGCANMessage> cANMessageAlls = new List<ZLGCANMessage>();

  

  public class ZLGCANMessage
    {
        /// <summary>
        /// CANID
        /// </summary>
        public uint CANID { get; set; }
        /// <summary>
        /// CAN长度
        /// </summary>
        public byte lenData { get; set; }
        /// <summary>
        /// CAN周期
        /// </summary>
        public int period { get; set; }
        /// <summary>
        /// CAN发送类型,0正常,1单词,2自发自收,3单次自发自收,默认固定0
        /// </summary>
        public byte sendType { get; set; }
        /// <summary>
        /// 0:data frame数据帧,1:remote frame远程帧
        /// </summary>
        public byte remoteFlag { get; set; }
        /// <summary>
        /// type帧类型,0:standard frame标准帧,1:extend frame扩展帧
        /// </summary>
        public byte externFlag { get; set; }
        /// <summary>
        /// 数据
        /// </summary>
        public byte[] Data { get; set; }
        public string DataString { get; set; }
        /// <summary>
        /// CAN发送协议,0CAN,1CANFD
        /// </summary>
        public byte protocol { get; set; }
        /// <summary>
        /// CANFD是否加速,0不加速,1加速
        /// </summary>
        public byte CANFDExp { get; set; }
    }

直接remove一样的类类型会false:cANMessageAlls.Remove(cANMessage);

原因是remove中是泛型T item

需要具体定义一下移除数据:

var whereRemove = cANMessageAlls.FirstOrDefault(t=>t.DataString== canMessage.DataString /*t => t.CANID == canMessage.CANID*/);
cANMessageAlls.Remove(whereRemove);

注意,如果其中的t定义的不是string类型,而是date数组这个参数时候,var为空

 

posted @ 2021-09-18 10:50  SHW03  阅读(33)  评论(0编辑  收藏  举报