我有一个包含以下属性的类：
public class SomeClass()
{
public Int32 ObjectId1 {get;set;}
public Int32 ObjectId2 {get;set;}
public Int32 ActiveThickeness {get;set;}
public Int32 ActiveFilterThickness {get;set;}
}
我还有 2 个清单：
List<SomeClass> A
List<SomeClass> B
列表A有数据：
| ObjectId1 | ObjectId2 | ActiveThickness | ActiveFilterThickness |
-------------------------------------------------------------------
| 1 | 3 | 50 | 0 |
------------------------------------------------------------------
| 1 | 2 | 400 | 0 |
-------------------------------------------------------------------
| 4 | 603 | 27 | 0 |
-------------------------------------------------------------------
列表B有数据：
| ObjectId1 | ObjectId2 | ActiveThickness | ActiveFilterThickness |
-------------------------------------------------------------------
| 1 | 3 | 0 | 13671 |
------------------------------------------------------------------
| 1 | 2 | 0 | 572 |
-------------------------------------------------------------------
| 29 | 11 | 0 | 4283 |
-------------------------------------------------------------------
我想将 A 和 B（如果可能的话使用 LINQ）合并到 SomeCalss 的列表 C 中，其中包含如下数据：
| ObjectId1 | ObjectId2 | ActiveThickness | ActiveFilterThickness |
-------------------------------------------------------------------
| 1 | 3 | 50 | 13671 |
------------------------------------------------------------------
| 1 | 2 | 400 | 572 |
-------------------------------------------------------------------
| 29 | 11 | 0 | 4283 |
-------------------------------------------------------------------
| 4 | 603 | 27 | 0 |
-------------------------------------------------------------------
我怎样才能做到这一点？
Use GroupBy对常见对象进行分组并Sum求和所需的属性
var ab = A.Concat(B).GroupBy(x => new
{
x.ObjectId1,
x.ObjectId2
});
var result = ab.Select(x => new SomeClass
{
ObjectId1 = x.Key.ObjectId1,
ObjectId2 = x.Key.ObjectId2,
ActiveFilterThickness = x.Sum(i => i.ActiveFilterThickness),
ActiveThickeness = x.Sum(i => i.ActiveThickeness)
});
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