設置並獲得來自課程

Question

的值

擁有內部具有多個channels的課程。對於每個通道，我們可以讀取或寫入相同的值。

int channel = 2; 
var value = obj.GetValue(channel); 
obj.SetValue(channel, value + 1); 

實現這一切Getters和Setters混淆了我自認爲C#允許有properties。有沒有更好的方法來做到這一點？

Answer 1

語義上「更好」的方式可能是實施indexer。

舉個例子，使用您有內部Channel對象的事實：

partial class MyClass 
{ 
    public Channel this[int channel] 
    { 
     get 
     { 
      return this.GetChannelObject(channel); 
     } 

     /* 
     * You probably don't want consumers to be able to change the underlying 
     * object, so I've commented this out. You could also use a private 
     * setter instead if you want to internally make use of the indexing 
     * semantic, but since you're most likely just wrapping an IList<Channel> 
     * anyway, you probably don't need it. 
     * 
     * set 
     * { 
     *  this.SetChannelObject(channel); 
     * } 
     */ 
    } 
} 

然後，你可以簡單地做：

int channel = 2; 
var value = obj[channel].ValueA; 
obj[channel].ValueA = value + 1;