c# - 如何在c#中自动更新属性

Question

我有一个 Json 对象。每当任何其他属性设置(更改)时，我想更新其lastUpdate属性。

如何在不从调用函数调用 lastUpdate 属性的情况下解决此问题？

public class TickerData
{
    public string symbol { get; set; }
    public string exchange { get; set; }
    public SecurityType securityType { get; set; }
    public string  Currency { get; set; } // convert to enum later

    public strategy  entryStrategy { get; set; }
    public OHLCV ohlcv { get; set; }
    public HistoricalDataEventArgs[] historicalData { get; set; }
    public DateTime date { get; set; }
    public decimal open { get; set; }
    public decimal high { get; set; }
    public decimal low { get; set; }

    public decimal close { get; set; }
    public DateTime lastUpdate { get; set; }
}

Answer 1

一种选择是:

1. 添加tickerChanged event到你的类(class)
2. 为您的属性提供您读取/写入的支持字段
3. 每次设置 lastUpdate 以外的支持字段时，调用 tickerChanged()

4. 向 tickerChanged 添加一个事件处理程序，用于更新 lastUpdate 属性

   public class TickerData
   {
       private event Action tickerChanged;
   
       private string _symbol;
       public string symbol
       {
           get
           {
               return _symbol;
           }
           set
           {
               _symbol = value;
               tickerChanged();
           }
       }
   
       private string _exchange;
       public string exchange
       {
           get
           {
               return _exchange;
           }
           set
           {
               _exchange= value;
               tickerChanged();
           }
       }
   
       // ... continue the pattern ...
   
       public DateTime lastUpdate { get; private set; }
   
       public TickerData()
       {
           // register an event handler that
           // updates the lastUpdate property
           tickerChanged += () => lastUpdate = DateTime.Now;
       }
   }