使用Linq在List上的Aggregete函数 [英] Aggregete function on List using Linq

问题描述

我有一个列表包含

list< cls> Objlist =新列表< cls>（）;



Obj1.Name =earth;

obj1.code =1

Obj1.Value = 10;

objlist.add（Obj1）;



Obj2.Name =sun ;

obj1.code =2

Obj2.value = 15;

objlist.add（Obj2）;



Obj3.Name =earth;

obj1.code =1

Obj3.Value = 25;

objlist.add（Obj3）;



Obj4.Name =earth;

obj1.code = 1

Obj4.Value = 35;

objlist.add（Obj4）;



Obj5。名字=太阳;

obj1.code =2

Obj5.value = 50;

objlist.add（Obj5）;



现在我想找到一个包含linq的子列表，即sum字段包含id的值组合总和。

Obj1。姓名=地球;

obj1.code =1

Obj1.sum = 70;

和

Obj5.Name =sun;

obj1.code =2

Obj5.sum = 65;

tks in advanc e

I have a list containg
list<cls> Objlist = new list<cls>();

Obj1.Name="earth";
obj1.code="1"
Obj1.Value = 10;
objlist.add(Obj1);

Obj2.Name="sun";
obj1.code="2"
Obj2.value = 15;
objlist.add(Obj2);

Obj3.Name = "earth";
obj1.code="1"
Obj3.Value = 25;
objlist.add(Obj3);

Obj4.Name = "earth";
obj1.code="1"
Obj4.Value = 35;
objlist.add(Obj4);

Obj5.Name="sun";
obj1.code="2"
Obj5.value = 50;
objlist.add(Obj5);

Now i want to find a sub list using linq which contain,ie sum field contain sum of value group by id.
Obj1.Name="earth";
obj1.code="1"
Obj1.sum= 70;
and
Obj5.Name="sun";
obj1.code="2"
Obj5.sum= 65;
tks in advance

推荐答案

请参阅 <你好这个 [ ^ ]类似用例的示例。



/ ravi

See this[^] example for a similar use case.

/ravi

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