DataGridCommandEventArgs类提供的几个关键属性:1、Item 代表被单击的按钮相关联的命令;2、CommandName 代表被引发的按钮相关联的命令名;3、CommandSource代表引发单击事件的按钮对象;
如在OnItemCommand事件里的函数调用: void ItemCommandHandler(Object sender,DataGridCommandEventArgs e)
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