c#中的?.Invoke,即問號點Invoke


轉自:https://hovertree.com/h/bjag/4dmf8x0u.htm

 

public delegate void OperateSuccessHanlder(string fileName); //創建委托
public event OperateSuccessHanlder OperateSuccess;
//UCPictureAdd.ascx.cs中的代碼
void OnOperateSuccess(string fileName)
        {
            OperateSuccess?.Invoke(fileName);
        }

  

上面代碼等價於:

public delegate void OperateSuccessHanlder(string fileName); //創建委托
public event OperateSuccessHanlder OperateSuccess;
//UCPictureAdd.ascx.cs中的代碼
void OnOperateSuccess(string fileName)
        {
           if(OperateSuccess!=null)
            {
                OperateSuccess(fileName);
            }
        }

  


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