DataList/Gridview/Repetor控件属性(例如Item.ItemType，ListItemType)，程序中的以下语句是否多余? [英] DataList / Gridview / Repetor control properties (e.Item.ItemType, the ListItemType of),Is the following sentence in the program redundant?

问题描述

 if((e.Item.ItemType == ListItemType.Item) || (e.Item.ItemType == ListItemType.AlternatingItem))

{
   LinkButton lbnupdate=(LinkButton)e.Item.FindControl("lbnupdate");
   LinkButton lbndel=(LinkButton)e.Item.FindControl("lbndel");
   lbnupdate.Visible=false;
   lbndel.Visible=false;
   if(Session["username"]!=null)
   {
     if (Session["flag"].ToString()=="admin")
     {
      lbnupdate.Visible=true;
      lbndel.Visible=true;
     }
    }
}

上面的代码if((e.Item.ItemType == ListItemType.Item)| |(e.Item.ItemType == ListItemType.AlternatingItem))可以替换为if((e.Item.ItemType == ListItemType.AlternatingItem)).项目)，结果是否相同?为什么我会看到很多示例的书面判断，例如上面的代码?

The code above if ((e.Item.ItemType == ListItemType.Item) | | (e.Item.ItemType == ListItemType.AlternatingItem)) can substitute into if ((e.Item.ItemType == the ListItemType of.the Item),is the result the same? why I see a lot of examples written judgment, such as the above code?

推荐答案

是的，这是多余的. AlternatingItem的类型也为ListItemType.Item.

Yes, it is redundant. A an AlternatingItem is also of type ListItemType.Item.

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