Lambda与LINQ

Lambda与LINQ写法对比：

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上为Lambda

下为LINQ

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• 显示指定列
• Students.select(u=>(new {Name=u.Sname,Address=u.Saddress}))
• from s in Students Select new {s.Sname,s.Saddress}

 

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• 有条件显示指定列
• Students.Where(s=>((s.SID<10)&&(s.Sname.Length<10)))

　　.Select(s=> new{Name = s.Sname,Sdd = s.Saddress})

• From s in Students

　　Where s.SID<10&& s.Sname.Length<10

　　Select new{Name = s.Sname,Sdd = s.Saddress}

 

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• 排序为升序
• Students.OrderBy(s=>s.SID)
• From s in Students

　　Orderby s.SID

　　Select s

 

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• 排序为降序
• Students.OrderByDescending(s=>SID).Select(s=>s)