最近在看书时看到一段VB.Net的代码.
           Select Case itemType
                Case ListItemType.Header
                    cell.Text = HeaderText
                Case ListItemType.Item, ListItemType.AlternatingItem
                    AddHandler cell.DataBinding, AddressOf ItemDataBinding
                Case ListItemType.EditItem
                    AddHandler cell.DataBinding, AddressOf EditItemDataBinding
                    Dim DDL As New DropDownList
                    cell.Controls.Add(DDL)
            End Select
想把这段代码翻译成C#,碰到了两个问题.一,当使用开关语句时,符合两种情况执行相同的代码,VB.net中用个逗号分隔就OK了( Case ListItemType.Item, ListItemType.AlternatingItem),而C#中似乎没有这种写法.今天偶然看到一段代码,发现连写连个case中间不加break就OK了.二,关于AddHandler cell.DataBinding, AddressOf ItemDataBinding的含义,在查找资料后发现是VB中关联事件和方法的写法,类似C#中的事件订阅.翻译后的C#代码如下:
  switch (itemType)
   {
    case ListItemType.Header:
    {
     cell.Text=HeaderText;
     break;
    }
    case (ListItemType.Item):
    case(ListItemType.AlternatingItem):
    {
     cell.DataBinding += new System.EventHandler(ItemDataBinding);
     break;
    }
//    case(ListItemType.AlternatingItem):
//    {
//     cell.DataBinding += new System.EventHandler(ItemDataBinding);
//     break;
//    }
    case(ListItemType.EditItem):
    {
     cell.DataBinding += new System.EventHandler(EditItemDataBinding);
     DropDownList ddl=new DropDownList();
     cell.Controls.Add(ddl);
     break;
    }

   }
不知道大家有没有更好的写法,